Surveying MCQs Set-3

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1. 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

angle from one transit station and distance from the other one

angles from two transit stations

2. Contours can be found in a _________________ map.

Topographical

Thematic

Physical

Political

3. Theory of probability is applied to

accidental errors only

cumulative errors only

none of these

both accidental and cumulative errors

4. A metallic tape is made of

invar

cloth and wires

steel

linen

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

optical square

perpendicular offsets

cross staff

oblique offsets

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

C-curve

Radial curve

Inverted curve

French curve

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

30°

60°

20°

45°

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

residual error

conditional error

weighted observation

true error

9. A contour line joins all the points having

zero elevation

equal vertical angles

equal elevation

similar reference points

10. Indirect methods uses how many methods?

2

4

3

6

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11. 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

equal to 180°

more than 180° but not more than 270°

more than 180° but not more than 225°

less than 180°

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

chords

consecutive coordinates

independent coordinates

Both of these

13. 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

radial offset

perpendicular offset

offset from chord produced

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

Catchment line

Ridge line

Dam line

Watershed line

15. The main object of running a tie line is

to check accuracy of work

to take offsets for detailed surveying

none of these

to take details of nearby objects

16. The error due to bad ranging is

cumulative; negative

cumulative; positive or negative

compensating

cumulative; positive

17. 'Offsets' are

ties or check lines which are perpendicular to chain line

chain lines which go out of alignment

short measurements from chain line

sets of minor instruments in chain surveying

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

Contour dams

Level vials

Foot screws

Contour maps

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

none of these

direct ranging

ranging

indirect ranging

20. 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 expensive

Direct method is most accurate but is slow

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21. How many methods of contouring are present?

3

4

5

2

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

geodetic survey

tachometric survey

circular curve ranging

astronomical survey

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

both right swing and left swing

right and left faces

both verniers

different parts of main scale

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

alidade

optical square

abney level

ceylon ghat tracer

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

none of these

different

both of these

same

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

GTS benchmarks

arbitrary benchmarks

temporary benchmarks

permanent benchmarks

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

bowditch rule

theodolite correction

Graphical method

transit rule

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

80 sq km

1500 sq km

500 sq km

260 sq km

29. Theodolite is an instrument used for measuring

(a) horizontal angle

(b) vertical angle

(d) none of these

(c) both (a) and (b)

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

Traversing method

Radiation method

Intersection method

Back scattering method

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31. 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

16

10

4

64

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

check line

base line

all of these

tie line

33. 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

6 chains

4 chains

34. Geodetic surveying is different from plane surveying because of

coverage of very large area

the curvature of the earth

undulations of the topography

the large difference of elevations between various points

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

steel tape

metallic tape

invar tape

chain

36. An invar tape is made of an alloy of

brass and steel

copper and steel

brass and nickel

nickel and steel

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

180

100

200

150

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

reiteration

double precision

by deflection angles

repetition

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

S-shaped

L-shaped

V-shaped

U-shaped

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

planimeter

theodolite

graphometer

clinometer

Surveying MCQs Set-3

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