Surveying MCQs Set-3

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

transit rule

Graphical method

theodolite correction

bowditch rule

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

temporary benchmarks

arbitrary benchmarks

permanent benchmarks

GTS benchmarks

3. A contour line joins all the points having

equal elevation

equal vertical angles

similar reference points

zero elevation

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

residual error

weighted observation

conditional error

true error

5. The main object of running a tie line is

to take details of nearby objects

to take offsets for detailed surveying

none of these

to check accuracy of work

6. Indirect methods uses how many methods?

2

3

6

4

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

260 sq km

80 sq km

1500 sq km

500 sq km

8. The error due to bad ranging is

cumulative; positive or negative

cumulative; positive

cumulative; negative

compensating

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

tachometric survey

astronomical survey

geodetic survey

circular curve ranging

10. Contours can be found in a _________________ map.

Thematic

Physical

Political

Topographical

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

Indirect method is relatively more expansive

Direct method is expensive

Indirect method is less accurate but is faster

Direct method is most accurate but is slow

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

both of these

same

different

none of these

13. A metallic tape is made of

cloth and wires

linen

invar

steel

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

check line

base line

all of these

tie line

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

different parts of main scale

both right swing and left swing

both verniers

right and left faces

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

none of these

direct ranging

indirect ranging

ranging

17. How many methods of contouring are present?

2

4

5

3

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

ceylon ghat tracer

abney level

optical square

alidade

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

angles and distances from transit stations

distances from two transit stations

angles from two transit stations

angle from one transit station and distance from the other one

20. An invar tape is made of an alloy of

brass and nickel

brass and steel

nickel and steel

copper and steel

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

perpendicular offset

radial offset

successive bisection of arcs

offset from chord produced

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

optical square

perpendicular offsets

oblique offsets

cross staff

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

20°

30°

60°

45°

24. 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°

less than 180°

equal to 180°

more than 180° but not more than 225°

25. 'Offsets' are

ties or check lines which are perpendicular to chain line

short measurements from chain line

sets of minor instruments in chain surveying

chain lines which go out of alignment

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

by deflection angles

reiteration

double precision

repetition

27. Geodetic surveying is different from plane surveying because of

the curvature of the earth

coverage of very large area

undulations of the topography

the large difference of elevations between various points

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

metallic tape

chain

steel tape

invar tape

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

180

200

100

150

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

U-shaped

V-shaped

L-shaped

S-shaped

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31. Theory of probability is applied to

cumulative errors only

both accidental and cumulative errors

accidental errors only

none of these

32. 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

16

10

4

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

clinometer

graphometer

theodolite

planimeter

34. 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

120 m

180 m

4 chains

6 chains

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

Inverted curve

C-curve

Radial curve

French curve

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

consecutive coordinates

independent coordinates

chords

Both of these

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

Contour dams

Contour maps

Level vials

Foot screws

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

Radiation method

Intersection method

Traversing method

Back scattering method

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

Catchment line

Dam line

Watershed line

Ridge line

40. Theodolite is an instrument used for measuring

(c) both (a) and (b)

(b) vertical angle

(a) horizontal angle

(d) none of these

Surveying MCQs Set-3

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