Surveying MCQs Set-3

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1. Theory of probability is applied to

cumulative errors only

both accidental and cumulative errors

accidental errors only

none of these

2. Geodetic surveying is different from plane surveying because of

undulations of the topography

the large difference of elevations between various points

coverage of very large area

the curvature of the earth

3. An invar tape is made of an alloy of

nickel and steel

copper and steel

brass and nickel

brass and steel

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

base line

all of these

check line

tie line

5. How many methods of contouring are present?

4

3

5

2

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

residual error

true error

conditional error

weighted observation

7. 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

permanent benchmarks

GTS benchmarks

arbitrary benchmarks

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

theodolite correction

bowditch rule

transit rule

Graphical method

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

clinometer

planimeter

graphometer

theodolite

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

perpendicular offsets

cross staff

oblique offsets

optical square

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11. Theodolite is an instrument used for measuring

(b) vertical angle

(a) horizontal angle

(d) none of these

(c) both (a) and (b)

12. The error due to bad ranging is

compensating

cumulative; negative

cumulative; positive or negative

cumulative; positive

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

Ridge line

Watershed line

Catchment line

Dam line

14. 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

64

10

4

15. 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

16. Contours can be found in a _________________ map.

Physical

Political

Topographical

Thematic

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

same

none of these

both of these

different

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

Contour dams

Level vials

Contour maps

Foot screws

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

indirect ranging

ranging

direct ranging

none of these

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

by deflection angles

reiteration

repetition

double precision

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

180

150

100

200

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

Back scattering method

Radiation method

Intersection method

Traversing method

23. The main object of running a tie line is

none of these

to check accuracy of work

to take offsets for detailed surveying

to take details of nearby objects

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

chain

steel tape

invar tape

metallic tape

25. A metallic tape is made of

cloth and wires

steel

invar

linen

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

geodetic survey

tachometric survey

astronomical survey

circular curve ranging

27. 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

120 m

4 chains

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

Direct method is most accurate but is slow

Direct method is expensive

Indirect method is relatively more expansive

Indirect method is less accurate but is faster

29. 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

260 sq km

500 sq km

30. 'Offsets' are

chain lines which go out of alignment

short measurements from chain line

sets of minor instruments in chain surveying

ties or check lines which are perpendicular to chain line

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

right and left faces

different parts of main scale

both verniers

both right swing and left swing

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

consecutive coordinates

chords

independent coordinates

Both of these

33. 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°

34. Indirect methods uses how many methods?

6

2

3

4

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

C-curve

Inverted curve

French curve

Radial curve

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

S-shaped

V-shaped

L-shaped

U-shaped

37. A contour line joins all the points having

equal vertical angles

similar reference points

zero elevation

equal elevation

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

optical square

abney level

alidade

ceylon ghat tracer

39. 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

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

30°

20°

60°

45°

Surveying MCQs Set-3

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