Surveying MCQs Set-3

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1. 'Offsets' are

sets of minor instruments in chain surveying

short measurements from chain line

ties or check lines which are perpendicular to chain line

chain lines which go out of alignment

2. An invar tape is made of an alloy of

brass and nickel

nickel and steel

copper and steel

brass and steel

3. Theodolite is an instrument used for measuring

(b) vertical angle

(a) horizontal angle

(c) both (a) and (b)

(d) none of these

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

conditional error

residual error

true error

weighted observation

5. Theory of probability is applied to

cumulative errors only

accidental errors only

none of these

both accidental and cumulative errors

6. A contour line joins all the points having

similar reference points

equal elevation

equal vertical angles

zero elevation

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

Intersection method

Radiation method

Traversing method

Back scattering method

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

astronomical survey

tachometric survey

circular curve ranging

geodetic survey

9. A metallic tape is made of

invar

steel

cloth and wires

linen

10. 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 from two transit stations

distances from two transit stations

angles and distances from transit stations

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11. Contours can be found in a _________________ map.

Thematic

Topographical

Physical

Political

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

500 sq km

260 sq km

80 sq km

1500 sq km

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

Foot screws

Contour dams

Level vials

Contour maps

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

U-shaped

S-shaped

L-shaped

V-shaped

15. 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

6 chains

180 m

4 chains

120 m

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

30°

45°

20°

60°

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

Direct method is expensive

Indirect method is relatively more expansive

Indirect method is less accurate but is faster

Direct method is most accurate but is slow

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

consecutive coordinates

independent coordinates

Both of these

chords

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

chain

metallic tape

invar tape

steel tape

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

repetition

double precision

by deflection angles

reiteration

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21. 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

10

16

64

4

22. 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

perpendicular offset

radial offset

offset from chord produced

23. Indirect methods uses how many methods?

4

2

3

6

24. The error due to bad ranging is

cumulative; positive or negative

compensating

cumulative; negative

cumulative; positive

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

Inverted curve

C-curve

French curve

Radial curve

26. The main object of running a tie line is

to check accuracy of work

none of these

to take details of nearby objects

to take offsets for detailed surveying

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

Ridge line

Dam line

Watershed line

Catchment line

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

different parts of main scale

right and left faces

both verniers

both right swing and left swing

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

all of these

check line

base line

tie line

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

direct ranging

ranging

none of these

indirect ranging

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

transit rule

theodolite correction

Graphical method

bowditch rule

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

cross staff

optical square

perpendicular offsets

oblique offsets

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

different

same

none of these

both of these

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

180

100

200

150

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

optical square

ceylon ghat tracer

alidade

abney level

36. Geodetic surveying is different from plane surveying because of

undulations of the topography

the large difference of elevations between various points

the curvature of the earth

coverage of very large area

37. How many methods of contouring are present?

5

3

4

2

38. 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°

more than 180° but not more than 270°

equal to 180°

39. 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

temporary benchmarks

GTS benchmarks

permanent benchmarks

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

planimeter

clinometer

graphometer

theodolite

Surveying MCQs Set-3

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