Surveying MCQs Set-3

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

150

100

200

180

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

true error

weighted observation

conditional error

residual error

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

Graphical method

theodolite correction

transit rule

bowditch rule

4. The error due to bad ranging is

cumulative; positive or negative

cumulative; positive

compensating

cumulative; negative

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

U-shaped

S-shaped

V-shaped

L-shaped

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

invar tape

chain

metallic tape

steel tape

7. Theory of probability is applied to

cumulative errors only

none of these

accidental errors only

both accidental and cumulative errors

8. 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 225°

less than 180°

equal to 180°

more than 180° but not more than 270°

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

Direct method is expensive

Direct method is most accurate but is slow

Indirect method is less accurate but is faster

Indirect method is relatively more expansive

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

1500 sq km

80 sq km

500 sq km

260 sq km

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11. Geodetic surveying is different from plane surveying because of

coverage of very large area

the large difference of elevations between various points

undulations of the topography

the curvature of the earth

12. 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

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

both right swing and left swing

both verniers

right and left faces

different parts of main scale

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

geodetic survey

tachometric survey

circular curve ranging

astronomical survey

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

Contour maps

Level vials

Contour dams

Foot screws

16. 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

4

16

10

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

Catchment line

Watershed line

Ridge line

Dam line

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

double precision

by deflection angles

reiteration

repetition

19. A contour line joins all the points having

equal vertical angles

zero elevation

equal elevation

similar reference points

20. A metallic tape is made of

cloth and wires

steel

invar

linen

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

C-curve

Radial curve

Inverted curve

French curve

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

20°

60°

45°

30°

23. The main object of running a tie line is

to take details of nearby objects

none of these

to take offsets for detailed surveying

to check accuracy of work

24. An invar tape is made of an alloy of

brass and steel

copper and steel

brass and nickel

nickel and steel

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

consecutive coordinates

chords

Both of these

independent coordinates

26. How many methods of contouring are present?

5

3

4

2

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

both of these

none of these

different

same

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

distances from two transit stations

angles and distances from transit stations

angles from two transit stations

angle from one transit station and distance from the other one

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

direct ranging

none of these

indirect ranging

ranging

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

theodolite

graphometer

planimeter

clinometer

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31. 'Offsets' are

sets of minor instruments in chain surveying

short measurements from chain line

chain lines which go out of alignment

ties or check lines which are perpendicular to chain line

32. 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

4 chains

120 m

6 chains

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

cross staff

oblique offsets

perpendicular offsets

optical square

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

permanent benchmarks

temporary benchmarks

GTS benchmarks

arbitrary benchmarks

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

abney level

alidade

ceylon ghat tracer

optical square

36. Indirect methods uses how many methods?

2

6

3

4

37. Contours can be found in a _________________ map.

Physical

Topographical

Thematic

Political

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

base line

check line

tie line

all of these

39. Theodolite is an instrument used for measuring

(a) horizontal angle

(b) vertical angle

(d) none of these

(c) both (a) and (b)

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

Radiation method

Intersection method

Back scattering method

Traversing method

Surveying MCQs Set-3

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