Surveying MCQs Set-3

Page 1 of 4

1. Which shaped lines indicate the presence of a ridge?

U-shaped

L-shaped

V-shaped

S-shaped

2. If the probable error in single observation is ±0.04 m and that of the mean is ±0.01 m, then the number of observations are

64

10

16

4

3. During chaining along a straight line, the leader of the party has 4 arrows in his hand while the follower has 6. Distance of the follower from the starting point is

180 m

120 m

6 chains

4 chains

4. The instrument, which is used to measure area upon contour map is

planimeter

clinometer

theodolite

graphometer

5. Number of links in a 30m metric chain is

200

100

150

180

6. 'Offsets' are

short measurements from chain line

ties or check lines which are perpendicular to chain line

sets of minor instruments in chain surveying

chain lines which go out of alignment

7. In case of angular measurements being more precise than the linear measurements, the traverse can be balanced by

Graphical method

bowditch rule

theodolite correction

transit rule

8. Theory of probability is applied to

cumulative errors only

both accidental and cumulative errors

accidental errors only

none of these

9. Which of the following is not a method used for plane table surveying?

Radiation method

Traversing method

Back scattering method

Intersection method

10. Which one of the following is carried out by two theodolite method?

tachometric survey

circular curve ranging

astronomical survey

geodetic survey

Page 2 of 4

11. A contour line joins all the points having

similar reference points

equal elevation

equal vertical angles

zero elevation

12. Theodolite is an instrument used for measuring

(c) both (a) and (b)

(a) horizontal angle

(d) none of these

(b) vertical angle

13. The gale method of traversing consists of plotting the points by

independent coordinates

chords

Both of these

consecutive coordinates

14. The longest chain line passing through the centre of the area is known as

base line

all of these

tie line

check line

15. How many methods of contouring are present?

4

3

5

2

16. Which of the following is not true for the direct and indirect methods of contouring?

Indirect method is less accurate but is faster

Indirect method is relatively more expansive

Direct method is most accurate but is slow

Direct method is expensive

17. A triangle is said to be well conditioned if none of its angles is less than

20°

45°

30°

60°

18. In a transit theodolite, error due to eccentricity of verniers is eliminated by reading

both verniers

different parts of main scale

right and left faces

both right swing and left swing

19. The position of a point can be fixed more accurately by

perpendicular offsets

optical square

cross staff

oblique offsets

20. Which of the following instruments is generally used for base line measurements?

metallic tape

steel tape

chain

invar tape

Page 3 of 4

21. The reference points on which a day's work is closed and from where levelling is continued the next day are called as

arbitrary benchmarks

permanent benchmarks

GTS benchmarks

temporary benchmarks

22. The curvature of the Earth's surface is taken into account only if the extent of survey is more than

80 sq km

260 sq km

500 sq km

1500 sq km

23. For setting out right angles, the instrument used is

alidade

ceylon ghat tracer

optical square

abney level

24. Which one of the following linear methods of setting out a circular curve needs reference of the centre of the curve?

successive bisection of arcs

offset from chord produced

perpendicular offset

radial offset

25. For locating a distance object visible from two transit stations, the method usually preferred is

angle from one transit station and distance from the other one

angles and distances from transit stations

angles from two transit stations

distances from two transit stations

26. ____________________ are not mandatory in civil engineering projects like road works, dams, canals, etc.

Level vials

Contour maps

Foot screws

Contour dams

27. An invar tape is made of an alloy of

copper and steel

nickel and steel

brass and nickel

brass and steel

28. The difference between the most probable value of a quantity and its observed value is

residual error

true error

weighted observation

conditional error

29. Indirect methods uses how many methods?

4

6

3

2

30. The sum of the three interior angles of a triangle, the vertices of which lie on the surface of the earth, covering a vast area of several hundreds of km² is

more than 180° but not more than 270°

equal to 180°

less than 180°

more than 180° but not more than 225°

Page 4 of 4

31. The line which separates the catchment basin from the rest of the area is

Dam line

Ridge line

Watershed line

Catchment line

32. The process of marking intermediate points on a survey line is known as

indirect ranging

none of these

ranging

direct ranging

33. Contours can be found in a _________________ map.

Thematic

Political

Physical

Topographical

34. Geodetic surveying is different from plane surveying because of

the large difference of elevations between various points

undulations of the topography

the curvature of the earth

coverage of very large area

35. A contour interval is the __________________ for all purposes.

none of these

different

both of these

same

36. The curves used for drawing lines between points in a contour line is

Inverted curve

French curve

Radial curve

C-curve

37. The error due to bad ranging is

cumulative; negative

cumulative; positive or negative

compensating

cumulative; positive

38. A metallic tape is made of

steel

invar

linen

cloth and wires

39. The main object of running a tie line is

to check accuracy of work

none of these

to take offsets for detailed surveying

to take details of nearby objects

40. To observe the included angle accurately, method preferred is

by deflection angles

repetition

reiteration

double precision

Surveying MCQs Set-3

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