ROAD INSPECTOR TEST BATCH
UNIT VI – Levelling
1) How many methods are used in levelling?
a) 3 b) 2 c) 4 d) 5
Option B
2) In __________ levelling, the first and last point is at a far distance.
a) Fly b) Differential c) Profile d) Reciprocal
Option B
3) The last reading taken from the instrument is called
a) End sight b) Free sight c) Fore sight d) Back sight
Option C
4) Reciprocal levelling is used when,
a) Flat terrain b) Obstacles are there
c) BM not visible d) Highway construction
Option B
5) The line of collimation method of reduced level does not provide a check on
a) Fore sight b) back sight
c) Intermediate sight d) reduced level
Option C
6) The fixed point whose elevation is known, is called-
a) Benchmark b) Change point
c) Reduced level d) Station
Option A
7) The height of any point w.r.t. Mean Sea Level is called-
a) Bench mark b) Datum
c) Level surface d) Reduced level
Option D
ROAD INSPECTOR TEST BATCH
8) ___________ is done for purpose of determining the elevations of ground surface along the
alignment of a road, canal, etc.
a) Differential levelling b) Simple levelling
c) Profile levelling d) None of above
Option C
9) The first staff reading taken after setting up of level on the point of known RL is known as
a) Initial reading b) Initial sight reading
c) Back sight reading d) None of above
Option C
10) For purpose of levelling, Govt. of India has establish GTS benchmarks at 100Km in whole
country. Here GTS
a) Greater trigonometry survey Great Trigonometrical Survey
b) Grand tectonic survey
c) Great triangulation survey
d) None of above
Option A
11) Correction for curvature in case of levelling is always
a) Additive b) Subtractive c) Both A and B d) None of above
Option B
12) Which type of levelling is done on the phenomenon, the difference in elevation between
two points is proportional to the difference in atmospheric pressure at these points?
a) trigonometric levelling b) spirit levelling
c) barometric levelling d) profile levelling
Option C
13) The formula for calculating R.L can be given as
a) H.I+F.S b) H.I-F.S c) H.I-B.S d) H.I+B.S
Option B
ROAD INSPECTOR TEST BATCH
14) In which process of levelling the elevations of points are computed from the vertical angles
and horizontal distances measured in the field?
a) Barometric levelling b) Trigonometric levelling
c) Spirit levelling d) Traverse levelling
Option B
15) Which of the following indicates the formula for arithmetic check?
a) B.S-F.S = Last R.L-First R.L
b) F.S-B.S = Last R.L-First R.L
c) B.S+F.S = First R.L-Last R.L
d) F.S+B.S = Last R.L-First R.L
Option A
16) Which of the following represents a form of Bench Mark (B.M)?
a) True Benchmark b) Assumed Benchmark
c) Datum d) Arbitrary Benchmark
Option D & B
17) What is the height of instrument, if elevation of benchmark is 200.852 m, back sight is
2.324 m, fore sight is 1.836 m?
a) 213.176 b) 203.176 c) 211.340 d) 201.340
Option B
18) Levelling deals with measurements in a
a) Horizontal plane b) Inclined plane
c) Vertical plane d) Both vertical and horizontal plan
Option C
19) Dumpy level is used for
a) Finding point to point distance
b) Finding the elevation difference
c) Finding the traverse area
d) Finding the perimeter of area
Option B
ROAD INSPECTOR TEST BATCH
20) How many categories of levelling staff are there
a) 4 b) 2 c) 3 d) 5
Option B
21) _________ is a line lying in a level surface.
a) Level line b) Horizontal line c) Datum line d) Plumb line
Option A
22) Which line is tangential to the level line at a point?
a) Datum line b) Vertical line c) Horizontal line d) Plumb line
Option C
23) Which line is normal to the level line at a point?
a) Datum line b) Vertical line c) Horizontal line d) Plumb line
Option B
24) Which term is used for the surface to which elevations are referred?
a) Level surface b) Level line
c) Horizontal plane d) Datum
Option D
25) Turning point is also called
a) Intermediate point b) level point
c) Change point d) end point
Option C
26) In an adjusted level, when the bubble is central, the axis of the bubble tube becomes
parallel to
a) Line of sight
b) line of collimation
c) axis of the telescope
d) None of these
Option A
ROAD INSPECTOR TEST BATCH
27) The sensitiveness of a level tube decreases if
a) Radius of curvature of its inner surface is increased
b) Diameter of the tube is increased
c) Length of the vapour bubble is increase
d) Both viscosity and surface tension are increased
Option D
28) The line normal to the plumb line is known as
a) Horizontal line b) Level line
c) Datum line d) Vertical line
Option B
29) During levelling if back sight is more than foresight
a) The forward staff is at lower point
b) The back staff is at lower point
c) The difference in level, cannot be ascertained.
d) None of these.
Option B
30) The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a
point is 1.345 m, the reduced level of the point, is
a) 502.685m b) 501.340m
c) 501.340m d) 504.030m
Option C
31) For true difference in elevations between two points A and B, the level must be set up
a) At any point between A and B
b) At the exact mid point of A and B
c) near the point A
d) Near the point B.
Option B
ROAD INSPECTOR TEST BATCH
32) The reduced level of a floor is 99.995 m, the staff reading on the floor is 1.505 m. If the
inverted staff reading against the roof is 1.795 m, the floor level below the slab, is
a) 3.290 m b) 3.300 m c) 3.275 m d) 2.790 m
Option B
33) An example for level surface is
a) Still water in a lake
b) Sea level unaffected by tides
c) An undulated ground
d) Hilly areas
Option A
34) In levelling, the correction for curvature (in metres) is equal
a) 0.00785 D² b) 0.0785 D² c) 0.0112 D² d) 0.0673 D²
Option B
35) Correction for curvature for a distance of 1 km is
a) 0.0112 m b) 0.0673 m c) 0.0785 m d) 0.0673 km
Option C
36) Which of the following statements are true about the purpose of levelling?
i) To Prepare a contour map for fixing sites reservoirs
ii) To determine the altitudes of different important points on a hill
iii) To determine the horizontal distance between two points
a) (iii) only b) (i) and (ii) only c) (i) and (iii) only d)(ii) and (iii) only
Option B
37) Only the back site and fore site readings are taken at every setup of level in
a) Check levelling b) Fly Levelling c) Simple Levelling d) Differential Levelling
Option B
38) In another name of differential levelling is
a) Levelling b) Check Levelling
c) Longitudinal Levelling d) Continuous Levelling
Option D
ROAD INSPECTOR TEST BATCH
39) Calculate the difference of level for A and B. If the B.S is 1.535 m and F.S is 0.795 m
a) 2.330m b) 1.740m c) 1.260m d) 0.740m
Option D
40) In rise and fall method the staff reading is greater the point is at
a) Rise b) Fall c) Equal d) Identical
Option B
41) In Simple Levelling . Height of Instrument is
a) R.L + B.S b) R.L – B.S c) R.L + F.S d) R.L – F.S
Option A
42) Reading of a staff held at a portico slab bottom of the roof is 2.900m . R.L of floor of
Portico is 200.305m. Staff reading on the floor level of portico is 0.905m. Height of Ceiling
from floor to portico bottom of slab is
a) 3.805 m b) 3 m c) 2.7 m d) 1.995 m
Option A
43) IS Code of Specification for levelling staves is
a) IS 1799:1961 b) is 1799: 1964 c) IS1779:1961 d) 1778:1961
Option C
44) Which of the following is true about the target staff?
1. The target staff is provided with a vernier which is adjusted by the staff man.
2. The reading is taken by either the staff man
3. The target staff is used only for short sighting
a) 3 Only b) 1 & 2 Only c) 1 & 3 Only d) 2 & 3 Only
Option B
45) For Estimating quantities of Earthwork which of the following survey is done.
a) Longitudinal Sectioning b) Cross Sectioning c) Fly Levelling d) None of these
Option B
46) Which levelling helps the engineers to study the relationship between existing ground
surface & proposed formation of new work in direction of length
a) Longitudinal Sectioning b) Cross Sectioning c) Fly Levelling d) Reciprocal levelling
Option A
ROAD INSPECTOR TEST BATCH
47) In which levelling level should be setup at just midway between B.S & F.S
a) Longitudinal Sectioning b) Cross Sectioning c) Fly Levelling d) Reciprocal levelling
Option C
48) The effect of curvature is _____ than effect of reflection
a) Smaller b) Greater c) Equal d) None of these
Option B
49) The combined effects of curvature of earth & reflection causes the points to appear ___
than actual.
a) Higher b) Lower c) Centre d) None of these
Option B
50) Boiling point of water gets ____ at higher altitudes.
a) Higher b) Lower c) Neither Higher nor Lower d) None of these
Option B
