All Subject MCQ
All Subject MCQ
The mass per unit volume of a liquid at a standard temperature and pressure is called
A.specific weight B. mass density✓
C. specific gravity D.none of these
The weight per unit volume of a liquid at a standard temperature and pressure is called
A.specific weight✓ B. mass density
C. specific gravity D.none of these
The specific weight of water in S.I. units is taken as
A.9.81 kN/m3 B. 9.81 x 103 N/m3
C. 9.81 x 10-6 N/mm3 D.any of these✓
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is
called
A.density of liquid B. specific gravity of liquid✓
C. compressibility of liquid D.surface tension of liquid
The specific gravity of water is taken as
A.0.001 B. 0.01
C. 0.1 D.1✓
The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is
A.200 kg / m3 B. 400 kg / m3
C. 600 kg / m3 D.800 kg / m3✓
The specific gravity of an oil whose specific weight is 7.85 kN / m3, is
A.0.8✓ B. 1
C. 1.2 D.1.6
The force per unit length is the unit of
A.surface tension✓ B. compressibility
C. capillarity D.viscosity
The variation in the volume of a liquid with the variation of pressure is called its
A.surface tension B. compressibility✓
C. capillarity D.viscosity
The mercuty does not wet the glass. This is due to the property of the liquid known as
A.cohesion B. adhesion
C. viscosity D.surface tension ✓
With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
A.decrease B. increase
C. remain unchanged D.depend upon the characteristics of liquid✓
The unit of surface tension is
A.N / m✓ B. N / m2
C. N / m3 D.N - m
Falling drops of water become spheres due to the property of
A.surface tension of water✓ B. compressibility of water
C. capillarity of water D.viscosity of water
The pressure at a point 4 m below the free surface of water is
A.19.24 kPa B. 29.24 kPa
C. 39.24 kPa✓ D.49.24 kPa
The height of a water column equivalent to a pressure of 0.15 MPa is
A.15.3 m✓ B. 25.3 m
C. 35.3 m D.45.3 m
The pressure measured with the help of a pressure gauge is called
A.atmospheric pressure B. gauge pressure✓
C. absolute pressure D.mean pressure
The atmospheric pressure at sea level is
A.103 kN / m3 B.10.3 m of water C.760 mm of mercury D.all of the above✓
Theme-41
The absolute pressure is equal to
A.gauge pressure + atmospheric pressure✓ B. gauge pressure - atmospheric pressure
C. atmospheric p essure - gauge pressure D.gauge pressure - vacuum pressure
The pressure less than atmospheric pressure is known as
A.suction pressure B. vacuum pressure
C. negative gauge pressure D.all of these✓
The pressure of a liquid measured with the help of a piezometer tube is
A.vacuum pressure B. gauge pressure✓
C. absolute pressure D.atmospheric pressure
The pressure measured with the help of a piezometer tube is in
A.N / mm2 B. N / m2
C. head of liquid✓ D.all of these
A piezometer tube is used only for measuring
A.low pressure B. high pressure
C. moderate pressure✓ D.vacuum pressure
The liquid used in manometers should have
A.low density B. high density
C. low surface tension D.high surface tension✓
A manometer is used to measure
A.atmospheric pressure B. pressure in pipes and channels✓
difference of pressures between two points in a
C. pressure in venturimeter D.
pipe
A manometer is used to measure
A.low pressure B. moderate pressure
C. high pressure✓ D.atomospheric pressure
The point at which the resultant pressure on an immersed surface acts, is known as
A.centre of gravity B. centre of depth
C. centre of pressure✓ D.centre of immersed surface
A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is
A.2.89 kM B. 8.29 kN✓
C. 9.28 kN D.28.9 kN
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the
A.sum B. difference✓
C. arithmatic mean D.geometric mean
The stability of a dam is checked for
A.tension at the base B. overturning of the wall or dam
C. sliding of the wall or dam D.all of these✓
The force of buoyancy is always
A.equal to✓ B.less than
C. more than
The centre of gravity of the volume of the liquid displaced is called
A.centre of pressure B. centre of buoyancy✓
C. metacentre D.none of these
The buoyancy depends upon the
A.weight of the liquid displaced✓ B. pressure with which the liquid is displaced
C. viscosity of the liquid D.compressibility of the liquid
The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
A.4.1s B. 5.2s
C. 10.4s✓ D.14.1s
One litre of water occupies a volume of
A.100 cm3 B.250 cm3 C.500 cm3 D.1000 cm3✓
One cubic metre of water weighs
A.100 Liters B.500 Liters C.250Liters D.1000 Liters✓
Theme-42
A flow in hich the quantity of liquid flowing per second is constant, is called
A.steady ✓ B. stream line
C. turbulent D.unsteady
A flow in which the quantity of liquid flowing per second is not constant, is called
A.streamline flow B. turbulent flow
C. steady flow D.unsteady flow✓
According to equation of continuity,
A.w1a1 = w2a2 B. w1v1 = w2v2
C. a1v1 = a2v2✓ D.a1/v1 = a2/v2
A flow through a long pipe at constant rate is called
A.steady uniform flow✓ B. steady non-uniform flow
C. unsteady uniform flow D.unsteady non-uniform flow
A flow through an expanding tube at constant rate is called
A.steady uniform flow B. steady non-uniform flow✓
C. unsteady uniform flow D.unsteady non-uniform flow
A flow whose streamline is represented by a curve, is called
A.one-dimensional flow B. two-dimensional flow✓
C. three-dimensional flow D.four-dimensional flow
A flow whose streamline is represented by a straight line, is called
A.one ✓ B.Two C. Three D.Four
In one dimensional flow, the flow
A.is steady and uniform B. takes place in straight line✓
C. takes place in curve D.takes place in one direction
The total head of a liquid particle in motion is equal to
A.pressure head + kinetic head + potential head✓ B. pressure head - (kinetic head + potential head)
C. potential head - (pressure head + kinetic head) D.kinetic head - (pressure he d + potential head)
The Bernoulli's equation is based on the assumption that
the velocity of flow is uniform across any cross-
A.there is no loss of energy of the liquid flowing B.
section of the pipe
C. no force except gravity acts on the fluid D.all of the above✓
. Bernoulli's equation is applied to
A.venturimeter B. orifice meter
C. pitot tube D.all of these✓
Barometer is used to measure
A.velocity of liquid B. atmospheric pressure✓
C. pressure in pipes and channels D.difference of pressure between two points in a pipe
Venturimeter is used to
A.measure the velocity of a flowing liquid B. measure the pressure of a flowing liquid
measure the discharge of liquid flowing in a pipe measure the pressure difference of liquid flowing
C. D.
✓ between two points in a pipe line
The length of the divergent cone in a venturimeter is
A.equal to B. double
C. three to four times✓ D.five to six times
In order to measure the flow with a venturimeter, it is installed in
A.horizontal line B. inclined line with flow upwards
C. inclined line with flow downwards D.any direction and in any location✓
A pitot tube is used to measure the
A.velocity of flow at the required point in a pipe B. pressure difference between two points in a pipe
C. total pressure of liquid flowing in a a pipe D.discharge through a pipe✓
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta.
The coefficient f contraction is
A.0.46 B. 0.64✓
C. 0.78 D.0.87
Theme-43
Coefficient of velocity is defined a the ratio of
actual velocity of jet at vena contracta to the
A. B. area of jet at vena contracta to the area of orifice
theoretical velocity✓
actual discharge through an orifice to the
C. D.none of the above
theoretical discharge
An average value of coefficient of velocity is
A.0.62 B. 0.76
C. 0.84 D.0.97✓
An orifice is said to be large, if
A.the size of orifice is large B. the velocity of flow is large
the available head of liquid is more than 5 times the available head of liquid is les than 5 times the
C. D.
the height of orifice height of orifice✓
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is
called a
A.notch B. weir
C. mouthpiece✓ D.nozzle
In a short cylindrical external mouthpiece, the vena contracta occurs at a distance
A.equal to B. one-fourth✓
C. one-third D.one-half
The coefficient of discharge for an external mouthpiece depends upon
A.velocity of liquid B. pressure of liquid
C. area of outhpiece D.length of mouthpiece✓
The coefficient of discharge for an external mouthpiece is
A.0.375 B. 0.5
C. 0.707 D.0.855✓
An internal mouthpiece is said to be running free if the length of the mouthpiece is
A.less than twice B. more than twice
C. less than three times✓ D.more than three times
The discharge through a convergent mouthpiece is
A.equal to B. one-half
C. three fourth D.double✓
A notch is used to measure
A.pressure B. Disagree✓
C. velocity D.volume
If the coefficient of discharge is 0.6, then the discharge over a right angled notch is
A.0.417 H5/2 B. 1.417 H5/2✓
C. 4.171 H5/2 D.7.141 H5/2
The discharge over a rectangular notch is
A.inversely proportional to H3/2 B. directly proportional to H3/2✓
C. inversely proportional to H5/2 D.directly proportional to H5/2
The discharge over a triangular notch is
A.inversely proportional to H3/2 B. directly proportional to H3/2
C. inversely proportional to H5/2 D.directly proportional to H5/2✓
An error of 1% in measureing head over the crest of the notch (H) will produce an error of
A.1% B.1.50%✓ C.2% D.2.5%
An error of 1% in measuring head over the apex of the notch (H) will produce an error of
A.1% B. 1.50%
C. 2% D.2.50%✓
A structure used to dam up a stream or river over which the water flows is called
A.orifice B. notch
C. weir✓ D.dam
The sheet of water flowing over a notch or a weir is known as
A.sill or crest B.nappe or vein✓ C.orifice D.none of these
Theme-44
To to of the weir over wh ch the water flows in known as
A.sill or crest✓ B. nappe or vein
C. oriffice D.none of thes
When the corfficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular
weir is
A.1.84 (L-0.1 nH) H3/2✓ B. 1.84 (L-nH) H2
C. 1.84 (L-0.1 nH) H5/2 D.1.84 (L-nH) H3
The Cippoletti weir is a
A.rectangular B. triangular
C. trapezoidal✓ D.circular
The Francis formula for the discharge over Cippoletti weir is
A.1.84 LH1/2 B. 1.84 LH
C. 1.84 LH3/2✓ D.1.84 LH5/2
The maximum discharge over a broad crested eir is
A.0.384 Cd x L x H1/2 B. 0.384 Cd x L x H3/2
C. 1.71 Cd x L x H1/2 D.1.71 Cd x L x H3/2✓
A weir, generally, used as a spillway of a dam is
A.narrow crested weir B. broad crested weir
C. Ogee weir✓ D.submerged weir
In a free nappe,
A.the pressure below the nappe is atmospheric✓ B. the pressure below the nappe is negative
C. the pressure above the nappe is atmospheric D.the pre sure above the nappe is negative
In a depressed nappe
A.the pressure below the nappe is atmospheric B. the pressure below the nappe is negative✓
C. the pressure above the nappe is atmospheric D.the pressure above the nappe is negative
The frictional resistance of a pipe varies approximately with
A.pressure B. velocity
C. square of velocity✓ D.cube of velocity
The hydraulic mean depth or the hyd aulic radius is the ratio of
A.area of flow and wetted perimeter✓ B. w tted perimeter and diameter of pipe
C. velocity of flow and a ea of flow D.none of these
The hydraulic mean depth for a circular pipe of diameter (d) is
A.d / 6 B. d / 4✓
C. d / 2 D.d
The total energy line lies over the hydraulic gradient line by an amount equal to the
A.pressure head B. velocity head✓
C. pressure head + velocity head D.pressure head - velocity head
The hydraulic gradient line lies over the centre line f the pipe by an amount equal to the
A.pressure head✓ B. velocity head
C. pressure head + velocity head D.pressure head - velocity head
The total energy line lies over the centre line of the pipe by an amount equal to
A.pressure head B. velocity head
C. pressure head + velocity head✓ D.pressure head - velocity head
The maximum efficiency of transmission through a pipe is
A.50% B. 56.70%
C. 66.67%✓ D.76.66%
An air vessel is provided at the summit in a syphon to
A.avoid interruption in the flow✓ B. increase discharge
C. increase velocity D.maintain pressure difference
A nozzle is generally made of
A.cylindrical shape B.convergent shape✓ C.divergent shape D.convergent-divergent shape
A nozzle placed at the end of a water pipe line discharges water at a
A.low pressure B.high pressure C.low velocity D.low velocity
Theme-45
The velocity through a channel of circular section will be maximum when the depth of water is
A.0.34 times B. 0.67 times
C. 0.81 times✓ D.0.95 times
The highest efficiency is obtained with a channel of
A.circular B. square
C. rectangular D.trapezoidal✓
If the depth of water in an open channel is greater than the critical depth, the flow is called
A.critical flow B. turbulent flow
C. tranquil flow✓ D.torrential flow
If the depth of water in an open channel is less than the critical depth, the flow is called
A.critical flow B. turbulent flow
C. tranquil flow D.torrential flow✓
The most efficient section of a channel is
A.triangular B. rectangular
C. square D.trapezoidal✓
The critical depth meter is used to measure
A.velocity of flow in an open channel B. depth of flow in an open channel
C. hydraulic jump✓ D.depth of channel
The coefficient of venturiflume, generally lies between
A.0.3 to 0.45 B. 0.50 to 0.75
C. 0.75 to 0.95 D.0.95 to 1.0✓
The unit of dynamic viscosity in S.I. units is
A.N-m/s2 B. N-s/m2✓
C. poise D.stoke
One poise is equal to
A.0.1 N-s/m2✓ B. 1 N-s/m2
C. 10 N-s/m2 D.100 N-s/m2
The kinematic viscosity is the
ratio of absolute viscosity to the density of the ratio of density of the liquid to the absolute
A. B.
liquid✓ viscosity
product of absolute viscosity and density of the product of absolute viscosity and mass of the
C. D.
liquid liquid
Stoke is the unit of
A.kinematic viscosity in C.G.S. units✓ B. kinematic viscosity in M.K.S. units
C. dynamic viscosity in M.K.S. units D.dynamic viscosity in S.I. units
One stoke is equal to
A.10-2m2/s B. 10-3m2/s
C. 10-4m2/s✓ D.10-6m2/s
The unit of kinematic viscosity in S. I. units is
A.N-m/s B.N-s/m2 C.m2/s✓ D.N - m
The viscosity of water at 20? C is
A.one stoke B. one centistroke
C. on poise D.one centipoise✓
A fluid having no viscosity is known as
A.real fluid B. ideal fluid✓
C. newtonian fluid D.non-newtonian fluid
A fluid which obeys the Newton's law of viscosity is termed as
A.real fluid B. ideal fluid
C. newtonian fluid✓ D.non-newtonian fluid
Water is a
A.real B.ideal C.newtonian ✓ D.non-newtonian
A flow in which the viscosity of fluid is dominating over the inertia force is called
A.steady flow B.unsteady flow C.laminar flow✓ D.turbulent flow
Theme-46
A flow in which
A.elastic B. surface tension
C. viscous D.inertia✓
The velocity at which the flow changes from laminar flow to turbulent flow is called
A.critical velocity✓ B. velocity of approach
C. sub-sonic velocity D.super-sonic velocity
. Reyold's number is the ratio of the inertia force to the
A.surface tension force B. viscous force
C. gravity force D.elastic force✓
The flow in a pipe is turbulent when Reynold number is
A.less than 2000 B. between 2000 and 2800
C. more than 2800✓ D.none of these
The vlow in a pipe is neither laminar nor turbulent when Reynold number is
A.less than 2000 B. between 2000 and 2800✓
C. more than 2800 D.none of these
The velocity corresponding to Reynold number of 2000 is called
A.sub-sonic velocity B. super-sonic velocity
C. lower critical velocity✓ D.higher critical velocity
The velocity corresponding to Reynold number of 2800, is called
A.sub-sonic velocity B. super-son velocity
C. lower critical velocity D.higher critical velocity✓
The loss of pressure head in case of laminar flow is proportional to
A.velocity✓ B. (velocity)2
C. (velocity)3 D.(velocity)4
The coefficient of viscosity may be determined by
A.capillary tube method B. orifice type viscometer
C. rotating cylinder method D.all of these✓
Bulk modulus of a fluid is the ratio of
A.shear stress to shear strain B. increase in volume to the viscosity of fluid
C. increase in pressure to the volumetric strain✓ D.critical veloity to the viscosity of fluid
When the Mach number is less than unity, the flow is called
A.sub-sonic flow✓ B. sonic flow
C. super-sonic flow D.hyper-sonic flow
When the Mach number is between
A.1 and 2.5 B. 2.5 and 4
C. 4 and 6 D.1 and 6✓
When the Mach number is more than 6, the flow is called
A.sub-sonic flow B. sonic flow
C. super-sonic flow D.hyper-sonic flow✓
. A flow is called sub-sonic, if the Mach number is
A.less than unity✓ B. unity
C. between 1 and 6 D.more than 6
A flow is called super-sonic if the
A.velocity of flow is very high B. discharge is difficult to measure
C. Mach number is between 1 and 6✓ D.none of these
A flow is called hyper-sonic, if the Mach number is
A.less than unity B. unity
C. between 1 and 6 D.none of these✓
A point, in a compressible flow where the velocity of fluid is zero, is called
A.critical point B. vena contracta
C. stagnation point✓ D.none of these
To force present in a moving liquid is
A.inertia force B.viscous force C.gravity force D.all of these✓
Theme-47
To product of mass and accelaration of flowing liquid is called
A.inertia force✓ B. viscous force
C. gravity force D.pressure force
Viscous force is the
A.sum B. different
C. product ✓ D.ratio
The ratio of the inertia force to the viscous force is called
A.Reynold's number✓ B. Froude's number
C. Weber's number D.Euler's number
The ratio of the inertia force to the
A.pressure force✓ B. elastic force
C. surface tension force D.viscous force
The ratio of the inertia force to the elastic force is called
A.Reynold's number B. Froude's number
C. Weber's number D.Mach number✓
Froude's number is the ratio of inertia force to
A.pressure force B. elastic force
C. gravity force✓ D.surface tension force
Euler's number is the ratio of
A.inertia ✓ B.gravity
C. viscous
Reynold's number is the ratio of inertia force to
A.pressure force B. elastic force
C. gravity force D.viscous force✓
The value of bulk modulus of a fluid is required to determine
A.Reynold's number B. Froude's number
C. Mach number ✓ D.Euler's number
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Theme-48
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Theme-49
Surveying
In plane surveying,
A.The curvature of the earth is taken into consideration B.the surveys extend over small areas✓
C. the surveys extend over large areas
The curvature of the earth is taken into consideration if the limit of survey is
A.50 to 100 km2 B. 100 to 200 km2
C. 200 to 250 km2 D.more than 250 km2✓
When 1 cm on a map represents 10 m on the ground, the representative fraction of the scale is
A.1?10 B. 1?100
C. 1?1000✓ D.1?10000
The representative fraction 1 / 2500 means that the scale is
A.1 cm = 0.25 m B. 1 cm = 2.5 m
C. 1 cm = 25 m✓ D.1 cm = 250 m
A plain scale is used to read
A.one dimension B. two dimensions✓
C. three dimensions D.all of these
A line joining some fixed points on the main survey lines, is called a
A.check line B. tie line✓
C. base line D.none of these
A line joining the apex of a triangle to some fixed point on the opposite side is called a
A.check line✓ B. tie line
C. base line D.none of these
A base line in a chain survey
enables the surveyor to locate the interior details which
A.checks the accuracy of the framework B.
are far away from the main chain lines
C. fixes up the directions of all other lines✓ D.all of the above
Chain surveying is most suitable when
A.area to be surveyed is small B. ground is fairly level and open with simple details
C. plans are required on a large scale D.all of the above✓
In a well conditioned triangle, no angle should be less than
A.30? ✓ B. 40?
C. 50? D.60?
The mimiting length of the offset is
A.5 m B. 10 m
C. 15 m✓ D.20 m
The adjustable cross-staff is used for setting out an offset
A.at an angle of 45? B. at an angle of 60?
C. at a right angle D.at any angle✓
An open cross-staff is commonly used for setting out
A.short offsets B. long offsets✓
C. oblique offsets D.none of these
The angle of intersection of the horizon glass and index glass in an optical square is
A.30? B. 45? ✓
C. 60? D.75?
The index glass in an optical square is
A.wholly silvered✓ B. wholly unsilvered
C. one-fourth silvered and three-fourth unsilvered D.half silvered and half unsilvered
The optical square is used to measure angles by
A.refraction B. reflection✓
C. double refraction D.double reflection
The angle between the reflecting surfaces of a prism square is
A.30? B. 45? ✓
C. 60? D.75?
Theme-50
In a whole circle bearing system, S 25? 15' E corresponds to
A.115? 15' B. 154? 45'✓
C. 205? 15' D.334? 45'
In a whole circle bearing system N 25? 15' W corresponds to
A.115? 15' B. 154? 45'
C. 205? 15' D.334? 45'✓
If the fore bearing of a line is 36? 15', its back bearing will be
A.36? 15' B. 126? 15'
C. 143? 45' D.216? 15'✓
If the fore bearing of a line is
A.36? 15' B. 126? 15'
C. 143? 45' D.216? 15'✓
If the fore bearing of a line is N 26? 35' W, its back bearing will be
A.S 26? 35' E✓ B. S 26? 35' W
C. N 26? 35' E D.N 53? 25' W
The horizontal angle between the true meridian and a survey line is called
A.magnetic bearing B. azimuth✓
C. dip D.magnetic declination
The horizontal angle between the true meridian and magnetic meridian is known as
A.true bearing B. dip
C. local attraction D.magnetic declination✓
At the equator, the amount of dip is
A.0? ✓ B. 45?
C. 60? D.90?
At the magnetic poles, the amount of dip is
A.0? B. 45?
C. 60? D.90? ✓
A back sight indicates the
A.shifting B.setting up✓
C. height
A fixed point of reference of known elevation is called
A.change point B. station point
C. bench mark✓ D.datum
A staff reading taken on a bench mark or a point of known elevation is called
A.fore sight reading B. back sight reading✓
C. intermediate sight D.any one of these
The reduced level of the plane of collimation is
A.equal to✓ B.less than
C. greater than
Collimation method is used in
A.profile levelling B. differential levelling
C. check levelling D.both (a) and (b) ✓
In levelling, the correction for combined curvature and refraction (in metres) is equal to
A.0.00785 D2 B. 0.0785 D2
C. 0.0112 D2 D.0.0673 D2✓
The contour lines can cross one another on map only in the case of
A.a vertical cliff B. a valley
C. a ridge D.an overhanging cliff✓
Contour lines cross ridge or valley lines at
A.30? B. 45?
C. 60? D.90? ✓
In route surveys, the most suitable method of contouring is
A.by squares B.by radial lines C.by radial lines D.by tacheometer
Theme-51
The reduced level of a point on the ground is called
A.spot level B. spot height
C. either (a) or (b) ✓ D.none of these
The spacing of cross-sections in a hilly country is usually
A.5 m B. 10 m
C. 15 m D.20 m✓
In indirect method of contouring, the best method of interpolation of contours is
A.by graphical method B. by estimation
C. by arithmetical calculation✓ D.all of these
The length of peg interval for flat curves is
A.15 m B. 20 m
C. 25 m D.30 m✓
The curve used for ideal transition curve is a
A.cubic parabola B. clothoid spiral
C. cubic spiral D.lemniscate✓
The shift of a curve is
A.equal to B. one-half
C. one-third D.one-fourth✓
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Theme-52
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Theme-53
Building Construction
The lowest part of a structure which transmits the load to the soil is known as
A.Super-structure B.Plinth C.Foundation✓ D.Basement
The foundation in a building is provided to
A.distribute the load over a large area B. increase overall stability of the structure
transmit load to the bearing surface (sub soil) at a
C. D.all of the above✓
uniform rate
The failure of foundation of a building is due to
A.withdrawl of subsoil moisture B. unequal settlement of soil
C. lateral escape of the supporting material D.all of these✓
The minimum load which will cause failure of a foundation is called
A.ultimate tensile strength B. nominal strength
C. ultimate bearing power✓ D.ultimate compressive strength
The bearing capacity of soils can be improved by
A.increasing the depth of footing B. draining the sub-soil water
ramming the granular material like crushed stone in
C. D.all of the above✓
the soil
The maximum bearing capacity of soil is that of
A.hard rocks✓ B. black cotton soil
C. dry, coarse sandy soil D.fine sandy soil
The minimum depth of foundation for buildings on clays is
A.0.2 to 0.4 m B.0.4 to 0.6 m C.0.6 to 0.9 m D.0.9 to 1.6 m✓
In order to protect the beam against corrosion, a minimum cover of
A.50 mm B.100 mm✓ C.100 mm✓ D.100 mm✓
Which of the following foundation is used for weaker soil?
A.Column footing B. Grillage footing
C. Raft footing D.all of these✓
The raft foundations are generally used when the required area of footing is
A.more than one-fourth B. less than one-fourth
C. more than one-helf✓ D.less than one-half
When two or more footings are connected by a beam, it is called
A.beam footing B. combined footing
C. strap footing✓ D.mat footing
A black cotton soil is unsuitable for foundations because it
undergoes volumetric changes with the change of
A. B. swells excessively when wet
atmospheric conditions
C. shrinks excessively when dry D.all of the above✓
When a veavy structure is to be constructed in sandy soil, the foundation used is
A.pier foundation✓ B. strap foundation
C. raft foundation D.any one of these
Pile foundation is generally used when the soil is
A. B.water-logged C.water-logged D.all of these✓
The type of foundation most suitable for brideges is
A.pier foundation B.raft foundation C.pile foundation✓ D.pile foundation✓
A combined footing is commonly used
A.when two columns are spaced close to each other✓ B. when two columns are spaced far apart
C. under a set of columns D.under a set of walls
Batter piles are
used to protect concrete deck or other water front
A.used to function as retaining walls B.
structures from the abrasion or impact
driven at an inclination to resist large horizontal driven in granular soil with the aim of increasing
C. D.
inclined forces✓ the bearing capacity of the soil
Theme-54
The best spacing of timber piles from centre to centre is
A.600 mm B. 700 mm
C. 800 mm D.900 mm✓
The maximum load on the wooden pile should not exceed
A.50 kN B. 100 kN
C. 150 kN D.200 kN✓
Pre-cast concrete piles are usually
A.reinforced concrete only B. plain or reinforced concrete
C. reinforced concrete or pre-stressed concrete✓ D.plain, reinforced concrete or pre-stressed concrete
The length of pre-cast concrete piles varies from
A.3 m to 4.5 m B. 4.5 m to 10 m
C. 4.5 m to 20 m D.4.5 m to 30 m✓
A type of cast-in-situ pile which has an enlarged base and a corrugated stem, is
A.simplex pile B. Franki pile✓
C. vibro-pile D.Raymond pile
The diameter of the drilled piles should not exceed
A.200 mm B. 400 mm
C. 600 mm✓ D.800 mm
The pre-stressed concrete piles as compared to pre-cast and reinforced concrete piles
A.are lesser in weight B. have high load carrying capacity
C. are extremely durable D.all of these✓
A steel pile which function more efficiently in soft clay or loose sand, is
A.H-pile B. pipe pile
C. screw pile✓ D.disc pile
A screw pile consists of cast iron or steel shaft of external diameter varying from
A.0 to 150 mm B. 150 to 300 mm✓
C. 300 to 450 mm D.450 to 600 mm
Sheet piles are made of
A.wood B.steel C.concrete D.all of these✓
The coefficient of friction between the concrete and soil is
A.0.20 to 0.25 B. 0.25 to 0.30
C. 0.30 to 0.35 D.0.35 to 0.50✓
When the pile is driven by means of water jets, water is forced through the jet pipe under a pressure of
A.0.2 to 0.5 N/mm2 B. 0.5 to 0.7 N/mm2
C. 0.7 to 1.75 N/mm2✓ D.1.75 to 2.5 N/mm2
For the pre-cast reinforced concrete piles, the quality of concrete recommended is
A.M 100 to M 150 B. M 150 to M 200✓
C. M 200 to M 250 D.M 250 to M 300
In the pre-cast reinforced concrete piles, the thickness of concrete covering the main bars should not be less
than
A.40 mm✓ B. 55 mm
C. 75 mm D.100 mm
The minimum covering of the reinforcement for the pre-cast reinforced piles used in sea water, is
A.40 mm B. 55 mm✓
C. 75 mm D.100 mm
When the depth of water is from 4.5 to 6 m, the type of coefferdam used is
A.earthen cofferdam B.rockfill cofferdam C.single-walled cofferdam✓ D.double walled cofferdam
A watertight structure constructed in connection with excavations for foundations of bridges, piers etc., is
known as
A.caisson✓ B. cofferdam
C. well foundation D.raft foundatio
The minimum depth of foundation for the load bearing wall of a building is restricted to
A.600 mm B.700 mm C.800 mm D.900 mm✓
Theme-55
The dampness in a building is due to
A.ground moisture B. rain water
C. defective construction D.all of these✓
The dampness on roof may be due to
A.use of porous materials B. insufficient lap of covering material
C. bad workmanship in plumbing D.all of these✓
The most commonly used material for damp proofing is
A.bitumen✓ B. paraffin wax
C. cement solution D.cement concrete
In case of buildings without basement, the best position for damp-proof course (D.P.C.) lies at
A.plinth level✓ B. ground level
C. 150 mm above plinth level D.150 mm above ground level
For D.P.C. at plinth level, the commonly adopted material is
A.bitumen sheeting B. plastic sheeting
C. mastic asphalt D.cement concrete✓
A semi-rigid material which forms an excellent impervious layer for damp-proofing, is called
A.bitumen B. mastic asphalt✓
C. aluminal D.bituminous felt
The damp-proof course
A.may be horizontal or vertical B. should be continuous
C. should be good impervious material D.all of these✓
The cavity wall is generally provided for
A.preventing dampness B.heat insulation
C. sound insulation
In horizontal D.P.C. at plinth level, the thickness of cement concrete of 1 : 2 : 4 mix, is kept as minimum of
400 mm.
A.Correct✓ B.Incorrect
A flexible material used for D.P.C. is
A.bitumen sheeting✓ B. plastic sheeting
C. mastic asphalt D.cement concrete
The construction of a temporary structure required to support an unsafe structure, is called
A.underpinning B. scaffolding
C. shoring✓ D.jacking
A temporary rigid structure having platforms raised up as the building increases in height, is called
A.underpinning B. scaffolding✓
C. shoring D.jacking
A horizontal layer of bricks laid in mortar is known as
A.course✓ B.stretcher C.header D.closer
The brick laid with its length perpendicular to the face of the wall is called a
A.course B. stretcher
C. header✓ D.closer
The brick laid with its length parallel to the face of the wall is called a
A.course B. stretcher✓
C. header D.closer
A brick which is cut in such a way that the width of its one end is half that of a full brick, is called
A.king closer✓ B. mitred closer
C. bevelled closer D.queen closer
A brick which is half as wide as a full brick, is called
A.king closer B. mitred closer
C. bevelled closer D.queen closer✓
The most important purpose of frog in a brick is to
A.emboss manufacture's name B. reduce the weight of brick
C. form keyed joint between brick and mortar✓ D.improve insulation by providing 'hollows'
Theme-56
King closers are related to
A.king post truss B. queen post truss
C. brick masonry✓ D.doors and windows
A course of stone provided immediately below a cornice, is called
A.blocking course B. coping
C. frieze✓ D.parapet
A course of stone masonry provided immediately above the cornice, is called
A.blocking course✓ B. coping
C. frieze D.parapet
The minimum thickness of a wall in stone masonry should not be less than
A.100 mm B. 200 mm
C. 350 mm✓ D.450 mm
A type of bond in a brick masonry consisting of alternate course of headers and stretchers, is called
A.English bond✓ B. Flemish bond
C. stretching bond D.heading bond
A stretcher bond is usually used for
A.half brick wall✓ B. one brick wall
C. one and half brick wall D.two brick wall
The heading bond is usually used for
A.half brick wall B. one brick wall✓
C. one and half brick wall D.two brick wall
The most commonly used bond for all wall thicknesses is
A.English bond✓ B. Flemish bond
C. stretching bond D.heading bond
Herring-bone bond is commonly used for
A.brick paving✓ B. very thick walls
C. partition walls D.footings in foundations
The filling in cavities with cement slurry is known as
A.coping B. beam-filling
C. grouting✓ D.gunniting
The arrangement of bricks is similar to English bond in
A.raking bond B. dutch bond
C. facing bond D.heading bond✓
A wall built to resist the pressure of earth filling, is known as
A.breast wall B. retaining wall
C. parapet wall D.duttress✓
A retaining wall may be built in
A.dry stone masonry B. stonemasonry
C. plain cement concrete D.all of these✓
A retaining wall is commonly required in the construction of
A.hill roads B. masonry dams
C. wing walls D.all of these✓
A partition wall may be
A.folding B. collapsible
C. fixed D.any one of these✓
In a brick nogging type of partition wall the vertical wooden members are called
A.noggings B. studs✓
C. sills D.templates
The sill in a wooden partition wall is the
A.vertical B. lower horizontal✓
C. upper horizontal D.intermediate horizontal
The nogging pieces are housed in the studs at a vertical distance of about
A.100 to 200 mm B.200 to 400 mm C.400 to 600 mm D.600 to 900 mm✓
Theme-57
In constructing concrete partition wall, the concrete mixture usually adopted is
A.M 100 B. M 150✓
C. M 200 D.M 250
The moulding provided under nosing to beautify the elevation of a step of stair, is called
A.flier B. soffit
C. scotia✓ D.tread
A series of steps without any platform, break or landing in their direction, is called
A.riser B. tread
C. flight✓ D.nosing
The brick flooring is used in
A.workshops B. godowns✓
C. verandahs D.none of these
The projecting part of the tread beyond the face of riser is called
A.pitch B. nosing✓
C. baluster D.stringer
In a public building, the stairs should be located near the
A.entrance✓ B. centre
C. end D.toilet
The angle which the line of nosing of the stair makes with the horizontal, is called
A.riser B. flier
C. soffit D.pitch or slope✓
In stairs, the vertical portion of a step providing a support to the tread, is known as
A.riser✓ B. flier
C. soffit D.pitch or slope
The size of a step commonly adopted for residential buildings is
A.250 mm x 160 mm✓ B. 270 mm x 150 mm
C. 300 mm x 130 mm D.350 mm x 100 mm
In residential building, the average value of stair width is
A.600 mm B. 700 mm
C. 800 mm D.900 mm✓
The pitch of stair should never exceed
A.20? B. 25?
C. 30? D.40? 2713
In wooden stairs, the thickness of tread is adopted as
A.28 mm B. 38 mm✓
C. 48 mm D.58 mm
The inner surface of an arch is called
A.extrados B. intrados✓
C. crown D.voussoir
The surface of the abutment on which the arch rests, is known as
A.span B. keystone
C. skew back✓ D.crown
The highest point on the extrados is called
A.skew back✓ B.crown C.voussoir D.keystone
The lower portion of an arch between the skew back and crown is called
A.depth B. rise
C. haunch✓ D.intrados
The vertical members which support the door frame are called
A.reveals B. styles
C. posts D.jambs✓
The bottom or lowermost horizontal part of a window frame is known as
A.sill✓ B.mullion C.transom D.transom
Theme-58
The width of jambs is
A.57 mm to 76 mm B. 76 mm to 114 mm✓
C. 114 mm to 138 mm D.138 mm to 152 mm
The depth of jambs is
A.57 mm to 76 mm✓ B. 76 mm to 114 mm
C. 114 mm to 138 mm D.138 mm to 152 mm
For ordinary Portland cement, the initial setting time should not be more than
A.30 minutes B. 1 hour
C. 5 hours D.10 hours✓
The cement which is commonly used in all types of structures and require no special consideration, is called
A.rapid hardening cement B. normal setting cement✓
C. quick setting cement D.white cement
High alumina cement is
made by fusing together a mixture of lime-stone highly resistant to heat, chemical and other
A. B.
and bauxite corrosive acids
used for structures subjected to the action of sea
C. D.all of the above✓
water
High early strength of cement is obtained as a result of
A.fine grinding✓ B. burning at high temperatures
C. decreasing the lime content D.increasing the quantity of gypsum
A fine aggregate is one whose particles are of size
A.4.75 mm B. below 4.75 mm✓
C. 6.75 mm D.above 6.75 mm
A coarse aggregate is one whose particles are of size
A.4.75 mm✓ B. below 4.75 mm
C. 6.75 mm D.above 6.75 mm
The higher water cement ratio in concrete results in
A.a weak mix B. a stronger mix
C. better workable mix✓ D.less bleeding
The slump commonly adopted for concrete for road works is
A.12 to 25 B. 20 to 28✓
C. 25 to 50 D.50 to 100
The slump commonly adopted for concrete for columns is
A.25 to 50 B. 50 to 100
C. 75 to 175✓ D.175 to 200
The vertical distance between the wall plate and top of the ridge is called
A.rise✓ B.rise✓ C.template D.gable
The type of truss commonly used for spans varying from 5 to 9 metre is
A.queen post truss B. king post truss✓
C. mansard truss D.composite truss
In a queen post truss,
A.two✓ B. three
C. four D.six
A queen post truss is commonly used for spans
A.upto 3.5 m B. from 3.5 to 5 m
C. from 5 to 8 m D.from 8 to 12 m✓
A couple-close roof is used for spans upto
A.3.5 m B. 5 m✓
C. 9 m D.14 m
The process of filling up all mail holes, cracks etc. with putty is known as
A.knotting B. priming
C. stopping✓ D.finishing
Theme-59
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Theme-60
Ab¨vb¨ †bvU
Theme-61
Environmental Engineering
The water supply system means
the entire scheme of collection and disposal of the complete layout from the source of supply to
A. B.
liquid waste the distribution✓
C. construction of reservoirs D.construction of canals
The water obtained from the tube wells is known as
A.surface water B. sub-surface water✓
C. run-off D.potable water
The water obtianed from
A.infiltration galleries B. springs✓
C. rivers D.wells
The water obtianed from
A.rains B. rivers
C. reservoirs D.artesian wells✓
A pipe sunk into the ground to tap the underground water is called
A.open well B. tube well✓
C. artesian well D.infiltration well
The earth's water circulatory system is known as.
A.water cycle B. hydrological cycle✓
C. precipitation cycle D.all of these
The quantity of water available from an infiltration gallery depends upon the
A.size of gallery B. nature of soil
C. yield of source D.all of these✓
The continuous flow of water may be expected from
A.surface springs B. artesian springs✓
C. gravity springs D.all of these
The water bearing strala i.e. layers of sand, gravel etc, is called
A.an acquifer✓ B. an aquiclude
C. an aquifuge D.zone of saturation
The open wells or dug wells are also known as
A.shallow wells B. draw wells
C. percolation wells D.all of these✓
The most important source of water for public water supply is
A.lake B.pond C.river D.sea✓
Run-off is the water which flows
A.in infiltration galleries B. in sewer pipes
C. due to leakage of pipes D.in rivers✓
The formula, F = R - K (1.8 T + 32), for obtaining the annual run-off is known as
A.Justin's formula B. Vermule's formula
C. Inglis formula D.Khosla's formula✓
The growth of population may be conveniently represented by
A.semi-logarthmic curve B. logistic curve✓
C. straight line curve D.all of these
The yield of a surface stream may be obtained by
A.cross-section velocity method B. strem gauging
C. chemical method D.all of these✓
The yield of a underground source may be obtained by
A.pumping test B. recupating test
C. both (a) and (b) ✓ D.none of these
The yield of the well dpends upon the
A.permeability of the soil B. position of water table✓
C. depth of well in impervious layer D.all of these
Theme-62
The yield of the well is measured in
A.cum / h B. litres / h
C. either (a) or (b) ✓ D.none of these
The domestic use of water amounts to
A.20% B.20% C.40% D.50%✓
The design period for a water supply project is taken as
A.5 to 10 years B. 10 to 15 years
C. 15 to 20 years D.20 to 30 years✓
The water mains should be designed for
A.100% B. 150%
C. 225%✓ D.250%
Suspended impurities consist of
A.iron B. chlorine
C. bacteria✓ D.all of these
Dissolved impurities consist of
A.bacteria B.iron✓ C.iron✓ D.fungi
The presence of bacteria in water causes
A.hardness B. alkalinity
C. diseases✓ D.bad taste
Colloidal impurities if associated with organic matter having bacterias becomes the chief source of
A.hardness B. epidemic✓
C. alkalinity D.bad taste
The presence of calcium and magnesium chloride in water causes
A.softening B. bad taste
C. hardness✓ D.turbidity
The turbidity in water is caused due to
A.silt B. clay
C. finely divided organic matter D.all of these✓
Suspended impurities include
A.algae B. protozoa
C. fungi D.all of these✓
The prsence of sodium chloride in water
A.causes bad taste B. softens the water✓
C. increases hardness of water D.stops epidemic
The sodium carbonate in water
A.causes bad taste B. softens the water
C. increases hardness of water D.stops epidemic✓
Turbidity of water is expressed in terms of
A.silica scale✓ B. platinum cobalt scale
C. pO value D.none of these
The colour of water is expressed in numbers of a
A.silica scale B. platinum cobalt scale✓
C. pO value D.none of these
The odour of water can be determined by
A.thermometer B.Osmoscope✓ C.Jackson's turbidimeter D.none of these
The commercial osmoscope is graduated with pO values from
A.0 to 5✓ B.5 to 10 C.10 to 15 D.15 to 20
When the pO value of water is 5, then it has
A.no perceptible odour B. distinct odour
C. faint odour D.extremely strong odour✓
The maximum permissible temperature for domestic supply is
A.5 to 10?C B10 to 15?C✓ C.15 to 20?C D.20 to 25?C
Theme-63
The maximum permissible colour for domestic supplies, on platinum cobalt scale is
A.5 to 10 ppm B. 10 to 20 ppm✓
C. 20 to 30 ppm D.30 to 40 ppm
The maximum permissible turbidity for domestic supplies, on silica scale is
A.5 to 10 ppm✓ B. 10 to 20 ppm
C. 20 to 30 ppm D.30 to 40 ppm
High turbidity of water can be determined by
A.turbidity tube B. Jacksons turbidimeter✓
C. Baylis turbidimeter D.Hellipe turbidimeter
Low turbidity of water can be determined by
A.turbidity tube B. Jacksons turbidimeter
C. Baylis turbidimeter✓ D.Hellipe turbidimeter
The maximum permissible total solid content in water for domestic purposes should not exceed
A.300 ppm B. 400 ppm
C. 500 ppm✓ D.1000 ppm
The maximum permissible chloride content in water for domestic supplies should not exceed
A.250 ppm✓ B. 350 ppm
C. 450 ppm D.550 ppm
pH value is a symbol for
A.magnesium B. hydrogen✓
C. calcium D.sodium
The product of H+ ions and OH- ions in a water solution is equal to
A.0 B. 10?1
C. 10?7 D.10?14✓
The maximum acidity in water will occur at a pH value of
A.0✓ B.2 C.7 D.14
The most common cause of acidity in water is
A.hydrogen B. oxygen
C. carbon dioxide✓ D.all of these
When the pH value of water is
A.equal to 7 B.less than 7✓
C. more than 7
When the pH value of water is more than 7, it represents
A.neutal B.acidic
C. alkaline✓
The alkalinity in water is caused by
A.sodium carbonate B. potassium carbonate
C. calcium hydroxide D.all of these✓
The maximum permissible chlorine content for public supplies should be between
A.0.1 to 0.2 ppm✓ B. 0.3 to 0.4 ppm
C. 1.2 to 4 ppm D.6.5 to 8 ppm
The maximum permissible quantity of iron and manganese in water for domestic purposes should be
A.0.1 ppm B. 0.3 ppm✓
C. 0.6 ppm D.0.8 ppm
The pH value of water for public supplies is limited from
A.2.5 to 6.5 B.6.5 to 8✓ C.8 to 10.5 D.10.5 to 15
he maximum permissible quantity of lead in water for domestic supplies is
A.0.01 ppm B. 0.05 ppm✓
C. 0.50 ppm D.1 ppm
Sodium carbonate causes
A.hardness B.softness✓
The maximum permissible fluorine content in water for domestic supplies should be
A.0.15 ppm B.1.5 ppm✓ C.15 ppm D.150 ppm
Theme-64
Sphere shaped bacterias are called
A.spirilla B. bacilli
C. cocci✓ D.trichobacteria
Membrane filter technique is used for testing
A.E-coli✓ B. copper
C. pathogenic bacterias D.none of these
The bacteria which require oxygen for their survival is known as
A.anaerobic bacteria B. pathogenic bacteria
C. aerobic bacteria✓ D.non-pathogenic bacteria
The bacteria which can survive without oxygen is called
A.anaerobic bacteria✓ B. pathogenic bacteria
C. aerobic bacteria D.non-pathogenic bacteria
Bacterias which cause disease are called
A.anaerobic bacteria B. facultative bacterias
C. aerobic bacteria D.none of these✓
The total count of bacteria per cubic centimetre for domestic purposes varies from
A.0 to 100✓ B. 100 to 150
C. 150 to 200 D.200 to 250
Copper sulphate is the most common chemical used for controlling
A.bacteria B. algae✓
C. silt D.mineral matter
Bio-chemical oxygen demand (B.O.D.) of safe drinking water must be
A.0✓ B. 10
C. 50 D.100
The rate of settling of a particle in water depends upon the
A.viscosity of water B. density of water
C. specific gravity of particle D.all of these✓
The detention time for an ordinary plain sedimentation tank is
A.1 to 2 hours B. 2 to 4 hours
C. 6 to 8 hours✓ D.20 to 24 hours
In a plain sedimentation tank, under normal conditions, impurities are removed upto
A.50% B. 60%
C. 70%✓ D.80%
The velocity of flow in any sedimentation tank should not exceed
A.0.05 mm/s B. 0.5 mm/s
C. 5 mm/s✓ D.50 mm/s
The most common coagulant is
A.magnesium sulphate B. alum✓
C. chlorine D.bleaching powder
Which of the following is not a coagulating agent?
A.Ferric sulphate B. Ferric chloride
C. Aluminium sulphate D.Copper sulphate✓
The process of purifying water by passing it through a bed of fine granular material, is called
A.screening B.filteration✓ C.filteration✓ D.sedimentation
The void spaces in the filtering material act like a
A.drain B. inlet
C. tiny settling basins✓ D.outlet
The sand, used for filteration, should not loose weight more than
A.2.50% B. 5%✓
C. 7.50% D.10%
The effective size of sand particles for slow sand filters varies from
A.0.30 to 0.35 mm✓ B. 0.35 to 0.50 mm
C. 0.50 to 0.65 mm D.0.65 to 0.75 mm
Theme-65
The effective size of sand particles for rapid sand filters varies from
A.0.30 to 0.35 mm B. 0.35 to 0.50 mm✓
C. 0.50 to 0.65 mm D.0.65 to 0.75 mm
The coefficient of uniformity for slow sand filters is
A.1.35 B. 1.55
C. 1.75✓ D.2.05
The slow sand filter should be cleaned if the loss of head becomes more than
A.0.75 m B. 1.2 m✓
C. 2.2 m D.3.5 m
After cleaning the slow sand filter, the filtered water should not be used for a period of
A.upto 6 hours B. 6 hours to 12 hours
C. 12 hours to 24 hours D.24 hours to 48 hours✓
Cleaning period for a slow sand filter is taken as
A.1 hour to 3 hours B. 1 day to 3 days
C. 1 week to 3 weeks D.1 month to 3 months✓
Rate of filteration of a slow sand filter ranges from
A.10 to 100 litres / h / m2 B. 100 to 200 litres / h / m2✓
C. 200 to 400 litres / h / m2 D.400 to 1000 litres / h / m2
Slow sand filter is efficient to remove the bacterias from the raw water to an extent of
A.50% B. 70%
C. 85% D.99%✓
Slow sand filter is more efficient for the removal of
A.bacteria✓ B. odour
C. turbidity D.all of these
The yield of a rapid sand filter is
A.10 times B. 15 times
C. 20 times D.30 times✓
An arrangement for back washing is provided in
A.slow sand filter B. sedimentation tank
C. rapid sand filter D.all of these
In a rapid sand filter, the filter head varies from
A.1 to 1.5 m B. 1.5 to 2 m
C. 2 to 4 m✓ D.4 to 5 m
Cleaning period for a rapid sand filter is taken as
A.2 to 3 hours B. 2 to 3 days✓
C. 2 to 3 weeks D.2 to 3 months
Rapid sand filter can remove bacterias upto an extent of
A.60% to 70% B. 70% to 80%
C. 80% to 90%✓ D.90% to 99%
Rapid sand filter can remove turbidity from water upto an extent of
A.15 to 25 ppm B. 25 to 35 ppm
C. 35 to 40 ppm✓ D.40 to 50 ppm
Pressure filters are best suited for
A.swimming pools B. railway stations
C. individual industries D.all of these✓
The process of killing pathogenic bacterias from water is called
A.sedimentation B. filteration
C. coagulation D.disinfection✓
The most commonly used disinfectant for drinking water throughout the world is
A.alum B. nitorgen
C. lime D.chlorine✓
The ideal method of disinfection of swimming pool water is by
A.chlorination B.lime treatment C.ozonisation✓ D.ultra-violet rays
Theme-66
The time of contact for chlorination should be at least
A.5 minutes B. 20 minutes✓
C. 1 hour D.2 hours
The treatment of water with only chlorine is known as
A.plain chlorination✓ B. post cholorination
C. pre-chlorination D.de-chlorination
Pre-chlorination
A.improves coagulation B. reduces odours
C. reduces tastes D.all of these✓
Crystalline hydrates of 'Ice" of chlorine are formed at a temerature of
A.below 10?C✓ B. 15?C
C. 20?C D.above 20?C
The apparatus used for feeding chlorine into water is called
A.chlorine tank B. aeration fountain
C. chlorinator✓ D.none of these
The residual chlorine
A.is zero B.is maximum
C. reappears✓
The process of removing excess chlorine from water is called
A.plain chlorination B. post-chlorination
C. dechlorination✓ D.super-chlorination
The process of dechlorination is followed by
A.pre-chlorination B. post cholorination
C. super chlorination✓ D.double chlorination
The amount of chlorine used for plain chlorination of water is about
A.0.2 ppm B. 0.3 ppm
C. 0.4 ppm D.0.5 ppm✓
The most commonly used chemical for dechlorination of water is
A.sodium thiosulphate B. sodium sulphite
C. potassium permaganate D.all of these✓
In orthotolodine test, safe residual for drinking water is indicated by
A.yellow colour✓ B. green colour
C. lemon yellow colour D.none of these
Bleaching powder is
A.slaked lime B. chloride of lime
C. hypo-chloride of lime D.hypo-chlorite of lime✓
The percentage of chlorine in fresh bleaching powder is
A.20 to 25% B. 25 to 30%
C. 30 to 35%✓ D.35 to 40%
The temporary hardness in water is cused due to the salts like
A.chlorides B. nitrates
C. carbonates✓ D.sulphates
The permanent hardness in water is caused due to the salts like
A.chlorides B. nitrates
C. sulphates D.all of these✓
The temporary hardness due to calcium bicarbonates can be removed by
A.boiling✓ B. lime process
C. lime-soda process D.zeolite process
The permanent hardness of water can be removed by
A.adding alum B. adding chlorine
C. boiling D.zeolite process✓
By lime soda process, hardness can be reduced to less thaN
A.50 ppm✓ B.75 ppm C.100 ppm D.150 ppm
Theme-67
Zeolite is
A.hydrated silica B. sodium silicate✓
C. dehydrated calcium silicate D.none of these
In Zeolite process
A.no sludge is formed B. water of varying quality can be treated
C. ferrous and manganese from water are removed D.all of tha above✓
The acration of water is done to remove
A.colour B. odour
C. taste D.all of these✓
A reflux valve is also known as
A.safety valve B. scour valve
C. air valve D.check valve✓
A scour valve, in a water distribution system, is provided at
A.low points✓ B. high points
C. junction points D.all of these
The hydrants are used for tapping waer from mains for
A.fire extinguishing B. street washing
C. flushing sewer lines D.all of these✓
The minimum size of a fire hydrant is
A.5 cm B. 10 cm
C. 15 cm✓ D.20 cm
The capacity of the pumps is normally expressed as
A.litres per minute B. cubic metres per day
C. thousands of litres per hour D.all of these✓
The suitable layout of a distribution system for well planned cities is
A.dead end system B. ring system✓
C. radial system D.grid iron system
Garbage is a
A.dry waste✓ B. semi-liquid waste
C. liquid waste D.none of these
The water from kitchens, bathrooms, wash basins is called
A.sewage B. sullage✓
C. raw sewage D.none of these
The quantity of liquid waste which flows in sewers during rainy season is called
A.storm sewage✓ B. dry weather flow
C. sanitary sewage D.industrial waste
A sewer which receives storm water, surface run-off and sewage is called a
A.common sewer B. combined sewer✓
C. branch sewer D.outfall sewer
A sewer which receives discharge of a number of house sewers is called a
A.common sewer B. trunk sewer
C. lateral sewer✓ D.branch sewer
A sewer which gets discharge from two or more main sewers is called
A.main sewer B. trunk sewer✓
C. combined sewer D.intercepting sewer
The water carriage sewage system removes
A.domestic sewage B. industrial sewage
C. storm sewage D.all of these✓
The quantity of storm water (Q) in liter per second is given by Q = CA3/4. This formula is called
A.Fanning's formula B. Ryve's formula
C. Dicken's formula✓ D.Inglis formula
The internal diameter of the sewer should not be less than
A.15 cm✓ B.25 cm C.50 cm D.75 cm
Theme-68
For house drainage and lateral connections, we shall use
A.stone ware sewers B. cast iron sewers
C. concrete sewers D.masonry sewers
For the sewers of diameter less than 600 mm, the type of joint preferred is
A.spigot and socket joint✓ B. collar joint
C. bandage joint D.mechanical joint
For the sewers of diameter more than 600 mm, the type of joint preferred is
A.spigot and socket joint B. collar joint✓
C. bandage joint D.mechanical joint
Manholes are, generally, located
A.at all changes of direction B. at all changes of gradient
C. at all junctions of main and branch sewers D.all of these✓
For large sewers, the maximum distance between manholes should be
A.75 m B. 150 m
C. 200 m D.300 m✓
The lower portion of a manhole is is known as
A.access shaft B. base
C. working chamber D.cover✓
The minimum diameter of a manhole cover should be
A.25 m B. 50 cm✓
C. 75 cm D.100 cm
Manholes on sewer lines are provided for
A.periodic cleaning✓ B. providing air for oxidation
C. removal of part of sewerage D.all of these
drop manhole is provided if
a branch sewer discharges into the main sewer at a
A.a sewer drops from a height B.
higher level✓
C. both (a) and (b) D.none of these
In one pipe system of plumbing, waste water is carried away from
A.bath rooms B. kitchens
C. wash basins D.all of these✓
The pipe through which liquid waste carrying human excreta flows, is called
A.waste pipe B. soil pipe✓
C. vent pipe D.all of these
called
A.waste pipe✓ B. soil pipe
C. vent pipe D.anti-siphonage pipe
A pipe installed for ventilation purpose is called
A.waste pipe B. soil pipe
C. vent pipe✓ D.anti-siphonage pipe
The privy pit should be located at least
A.3 m✓ B. 10 m
C. 30 m D.50 m
A septic tank is a
A.sedimentation tank B. digestion tank
C. combination of sedimentation and digestion tank✓ D.aeration tank
The effluents from the septic tank are discharged into
A.soak pit✓ B. drainage
C. oxidation pond D.sewer
The equipment used for removing paper and rags from sewers is called
A.gouge B.scoop C.claw✓ D.scraper
The minimum dissolved oxygen required in water to save the aquatic life is
A.1 ppm B.02 ppm C.4 ppm✓ D.8 ppm
Theme-69
The secondary treatment of sewage is carried out by the use of
A.screens B. grit chambers
C. trickling filters✓ D.chlorinators
In primary settling tank, suspended solids are reduced from
A.10 to 20% B. 20 to 40%
C. 40 to 70%✓ D.70 to 90%
In high rate activated sludge treatment, bacterias are removed from
A.20 to 40% B. 40 to 60%
C. 60 to 80% D.80 to 95%✓
Grit chambers of a sewage plant are usually changed after
A.1 day B. 1 week
C. 2 weeks✓ D.4 weeks
Biological action is used in
A.screens B. sedimentation tanks
C. trickling filters✓ D.all of these
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Theme-70
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Theme-71
Irrigation Engineering
For irrigation purposes, the p-H value of water should be
A.between 3 and 6 B. between 6 and 8.5✓
C. between 8.5 and 11 D.more than 11
Which of the salt present in water is harmful for cultivation purposes?
A.Sodium carbonate B. Potassium sulphate
C. Calcium sulphate D.none of these✓
Super-fluous water is also called
A.capillary water B. gravitational water✓
C. hygroscopic water D.all of these
A useful soil moisture for plant growth is
A.capillary water✓ B. gravitational water
C. hygroscopic water D.all of these
The field capacity of a soil depends upon
A.capillary tension in soil B. porosity of soil
C. either (a) or (b) D.both (a) and (b) ✓
The duty is largest
A.at the head of the main canal B. at the head of the water course
C. on the field✓ D.at all place
The duty of irrigation water will be less if
A.area irrigated is more B. water supply required is less
C. water supply required is more✓ D.none of these
The first watering before sowing the crop, is known as
A.kor watering B. paleo✓
C. delta D.none of these
The depth of root zone is 90 cm for
A.wheat B. sugar cane
C. rice✓ D.cotton
The average delta of rice crop is nearly
A.30 cm B. 60 cm
C. 120 cm✓ D.150 cm
The duty of a crop is 432 hectares per cumec when the base period of the crop is 100 days. The delta for the
crop will be
A.100 B. 200✓
C. 432 D.864
The average duty for sugar-cane in hectares/cumec is
A.200 B. 400
C. 600 D.800✓
The optimum depth of kot watering is 19 cm for
A.wheat B. sugar-cane
C. rice✓ D.cotton
Outlet discharge for a particular crop is given by
A.Area / Outlet factor✓ B. Outlet factor / Area
C. Area x Outlet factor D.none of these
The optimum depth of kor watering for wheat in the plains of north India is
A.13.5 cm✓ B. 16.5 cm
C. 19 cm D.21 cm
The hydrology helps in
A.predicting maximum discharge B. deciding capacity of reservoir
C. fore casting flood D.all of these✓
The amount of precipitation is measured by
A.rain gauge✓ B. osmoscope
C. turbidimeter D.all of these
Theme-81
The commonly used rain gauge is
A.weighing bucket type B. tipping bucket type
C. float type✓ D.none of these
The standard height of a standard rain gauge is
A.10 cm B. 20 cm
C. 30 cm✓ D.40 cm
Run-off is measured in
A.m3/s✓ B. m3/min
C. m3/h D.none of these
A canal sligned nearly parallel to the contours of a country, is known as
A.side slope canal B. contour canal✓
C. water shed canal D.ridge canal
The water shed canal is also called
A.side slope canal B. contour canal
C. ridge canal✓ D.all of these
The saturation gradient in an ordinary loam soil is
A.1 ; 1 B. 2 ; 1
C. 3 ; 1 D.4 ; 1✓
The height of dowel above the road level should not be more than
A.10 cm B. 20 cm
C. 30 cm✓ D.40 cm
The width of dowel is, usually, kept from
A.0.1 m to 0.3 m B. 0.3 m to 0.6 m✓
C. 0.6 m to 0.9 m D.0.9 m to 1.2 m
The soil becomes, practically, infertile if its p-H value is
A.0 B. 7
C. 11✓ D.14
The perimeter discharge (P-Q) relation is given by the equation
A.P = 2.25 Q1/2 B. P = 2.25 Q3/2
C. P = 4.75 Q1/2✓ D.P = 4.75 Q3/2
The capacity of escape channel should not be less than
A.20% B. 30%
C. 40% D.50%✓
The slope of a canal, for a discharge of 300 cumecs, should be
A.1 in 4000 B. 1 in 6000
C. 1 in 8000✓ D.1 in 10000
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Theme-82
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Theme-83
NOTE
THE END