d.

Maximum hourly demand on maximum day

Environmental Engineering

1. In India, as per Indian standards, water

consumption per capita per day for domestic
purpose in city area is
a) 85 litres
b) 115 litres
10. Intake wall are provided to
c) 100 litres
a. Carry water from a treatment
d) 135 litres
b. Draw water from a ground sources
2. Which of the following industry consumes more
c. Collect water from a surface soures
than a million quantity of water?
d. Distributes water to the consumer
a) paper & pulp manufacturing
11. The performance of a well is measured by its
b) petroleum refining
a. specific yield
c) steel manufacturing
b. specific capacity
d) sugar manufacturing c. storage coefficient
3. Which of the following method is used to d. permeability coefficient
forecast the population of old and very large
12. Highest specific yield from an aquifer will be
city?
from:
a) Arithmetical increase method
a. Water bearing formation of clay
b) Geometric progression method b. Water bearing formation of coarse gravel
c) Graphical method
c. Both formations of clay and coarse gravel
d) Logistic curve method
will have equal specific yield.
4. The accurate method for forecasting the
d. As formation of coarse gravel will have
population of a rapidly increasing city is
more pores these will not hold any water.
5. OR
13. Aquicludes are
6. Suitable method for forecasting population of a a. Permeable formation
young and rapidly growing city b. Impermeable formation
a) Arithmetic increase method
c. Contain water
b) Geometrical increase method
d. Both (b) and (c)
c) Increment increase method
14. Dupuit's assumptions are valid for
d) Graphical method a. Artesian aquifer
7. The multiplying factor, as applied to obtain b. Confined aquifer
peak hourly demand, in relation to average
c. Leaky aquifer
daily demand (per hour of course), is
d. Unconfined aquifer
a) 2.0
15. The total water requirement of a city is
b) 2.7
generally assessed on the basis of
c) 1.5
a. Maximum hourly demand
d) 1.8
b. Maximum hourly demand + fire demand
8. The distribution system in water supplies is
c. Average daily demand + fire demand
designed on the basis of:
d. Greater of (a) and (b)
a. Average daily demand.
16. The sub-surface water obtained under pressure
b. Peak hourly demand. is generally known as
c. Coincident of draft. a. open well
d. Greater of (b) and (c).
b. tube well
9. The distribution mains are designed for
c. infiltration well
a. Maximum daily demand
d. artesian well
b. Maximum hourly demand
c. Average daily demand
17. If the annual average daily water consumption a. Strainer well
of a city is 48000 cubic meters, the maximum b. Cavity well
hourly demand will be c. Slotted well
a. 1500 cum/hour d. Perforated well
b. 2700 cum/hour 26. The yield of a well depends upon :
c. 2000 cum/hour a. Permeability of soil
d. 5400 cum/hour b. Area of aquifer opening into the wells
18. What will be the fire demand for a city having c. Actual flow velocity
population of 4,00,000 by the Kuichling's d. All of the above
formula ? 27. Water supply includes
a. 32,159 litres/min a. Collection, transportation and treatment of
b. 49,991 litres/min water
c. 56,111 litres/min b. Distribution of water consumers
d. 63,640 litres/min c. Provision of hydrants for fire fighting
19. Maximum daily demand in supply is equal to d. All the above
a. 2.5 × average daily demand 28. If d is the depth of the aquifer through which
b. 2.4 × average daily demand water is flowing, then the relationship between
c. 3.2 x average daily demand permeability K and transmissibility T is given
d. 1.8 average daily demand by:
20. A long pipe is bored (or) drilled deep into the a. T = Kd
ground to tap the underground water is called b. T = K/d
a. Open well c. T = √Kd
b. Tube well d. K = √Td.
c. Artesian well 29. The vertical wells provided along the banks of a
d. Infiltration well river to draw ground water in dry season are
e. Answer not known called:
21. Decrease in per capita consumption of water is a. open wells
observed in the : b. artesian wells
a. hotter climate c. tube wells
b. good quality water d. infiltration wells
c. modern living 30. The quantity of water retained by the sub-soil
d. metering system against gravity, is called :
22. Water distribution system are sized to meet the a. Yield
a. maximum hourly demand b. Porosity
b. average hourly demand c. Specific yield
c. maximum daily demand and fire demand d. Specific retention
d. average daily demand and fire demand 31. Ground water is usually free from
23. When water is flowing through some continued a. Suspended impurities
aquifer, the spring formed is known as a/an b. Dissolved impurities
a. surface spring c. Both (a) & (b)
b. artesian spring d. None of these
c. unconfined spring 32. The highest yield of water can be expected from
d. gravity spring a. gravity springs
24. A number of filtration wells are connected b. surface springs
through porous pipes to a sump well known as c. artesian wells
a. Open well d. aquifuge
b. Spring 33. The maximum discharge of a tube-well is about
c. Ranney well a. 5 litres/sec
d. Jack well b. 50 litres/sec
25. The most widely used tube well in India is c. 500 litres/sec
 d. 100 litres/sec b. 1.48
34. Horizontal tunnels constructed at shallow depth c. 1.8
along the bank of a river to intercept ground d. 2.7
water table are called : 42. The ratio of maximum weekly water demand to
a. Springs average weekly water demand will be
b. Infiltration gallery a. 1.28
c. Infiltration wells b. 1.8
d. Intake wells c. 1.48
35. An infiltration gallery is used to obtain water d. 2.7
from
a. a well sank in a river bed
b. a trench dug in river bed
c. performed pipe laid in trench in a river bed
d. impounded reservoir
36. A water supply scheme has to be designed for a
city having a population of 100,000 people. If
the average consumption is 250 Lpcd, the
estimated average daily draft is:
a. 45 MLD 43. In case of Incremental increase method for
b. 25 MLD forcasting population, the incremental increase
c. 15 MLD is
d. 35 MLD (a) Always constant
37. The geologic formation which is neither porous (b) Always positive
nor permeable, and hence neither contains nor (c) Always negative
yields groundwater is temed as (d) May be positive or negative
a. Aquiclude 44. Which of the method gives highest value of
b. Aquifer forecasted population?
c. Aquitard (a) The arithmetic increase method
d. Aquifuge (b) The geometric increase method
38. Water free from impurities can be obtained (c) The incremental increase method
from (d) None of these
a. Lakes 45. To estimate the water quantity which one of the
b. Reservoirs following is most important?
a. Rivers (a) rate of demand and population
b. Springs (b) cost of supply and population
39. When water is flowing through some continued (c) adequacy of source and cost of supply
aquifer, the spring formed is known as a/an (d) all the above
a. surface spring 46. Per capita water demand is-
b. unconfined spring (a) average amount of daily water required
c. artesian spring by one person
d. gravity spring (b) monthly average amount of daily water
40. The discharge per unit drawdown at the well is required by one person
known as (c) annual average amount of daily water
(a) Specific retention required by one person
(b) Specific yield (d) weekly average amount of daily water
(c) Specific storage required by one person
(d) Specific capacity 47. The population growth curve is
41. The ratio of maximum monthly water demand (a) circular curve
to average monthly water demand will be (b) parabolic curve
a. 1.28
 (c) S-shaped curve
(d) straight line
48. The water which is safe and potent for drinking
to human health is known as
(a) Hard water
(b) Soft water
(c) Wholesome water
(d) Waste water
49. Which of the following is preferred for turbidity
measurement of water when turbidity of the
sample is less than 5?
(a) Baylis turbidimeter
(b) Jackson's turbidimeter
(c) Turbidity rod
(d) Turbidity tube
50. The maximum permissible quantity of Iron and
Manganese in water for domestic purpose
should be
(a) 0.1 ppm
(b) 0.6 ppm
(c) 0.3 ppm
(d) 0.8 ppm
(e) Answer not known