Surveying MCQs Set-3

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1. A contour line joins all the points having

similar reference points

equal vertical angles

zero elevation

equal elevation

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

right and left faces

both right swing and left swing

different parts of main scale

both verniers

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

theodolite correction

transit rule

Graphical method

bowditch rule

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

30°

45°

60°

20°

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

Both of these

chords

consecutive coordinates

independent coordinates

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

geodetic survey

astronomical survey

circular curve ranging

tachometric survey

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

check line

all of these

tie line

base line

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

offset from chord produced

radial offset

perpendicular offset

successive bisection of arcs

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

reiteration

repetition

double precision

by deflection angles

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

true error

residual error

conditional error

weighted observation

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

200

180

100

150

12. '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

13. A metallic tape is made of

cloth and wires

linen

invar

steel

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

graphometer

theodolite

planimeter

clinometer

15. Contours can be found in a _________________ map.

Topographical

Political

Thematic

Physical

16. Geodetic surveying is different from plane surveying because of

the curvature of the earth

coverage of very large area

the large difference of elevations between various points

undulations of the topography

17. Theory of probability is applied to

none of these

cumulative errors only

accidental errors only

both accidental and cumulative errors

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

direct ranging

ranging

indirect ranging

none of these

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

Intersection method

Radiation method

Back scattering method

Traversing method

20. 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°

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21. The error due to bad ranging is

cumulative; positive

cumulative; positive or negative

cumulative; negative

compensating

22. An invar tape is made of an alloy of

copper and steel

nickel and steel

brass and nickel

brass and steel

23. 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

4 chains

6 chains

180 m

120 m

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

Foot screws

Level vials

Contour maps

Contour dams

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

V-shaped

U-shaped

S-shaped

L-shaped

26. How many methods of contouring are present?

5

2

4

3

27. The main object of running a tie line is

to take offsets for detailed surveying

to take details of nearby objects

none of these

to check accuracy of work

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

different

none of these

same

both of these

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

oblique offsets

perpendicular offsets

optical square

cross staff

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

Catchment line

Watershed line

Ridge line

Dam line

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

Radial curve

Inverted curve

French curve

C-curve

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

Indirect method is relatively more expansive

Direct method is most accurate but is slow

Direct method is expensive

Indirect method is less accurate but is faster

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

optical square

ceylon ghat tracer

alidade

abney level

34. Theodolite is an instrument used for measuring

(c) both (a) and (b)

(d) none of these

(a) horizontal angle

(b) vertical angle

35. 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

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

metallic tape

steel tape

invar tape

chain

37. Indirect methods uses how many methods?

6

2

3

4

38. 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

10

4

16

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

permanent benchmarks

GTS benchmarks

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

80 sq km

260 sq km

500 sq km

1500 sq km

Surveying MCQs Set-3

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