Surveying MCQs Set-3

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1. 'Offsets' are

chain lines which go out of alignment

sets of minor instruments in chain surveying

short measurements from chain line

ties or check lines which are perpendicular to chain line

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

weighted observation

true error

residual error

conditional error

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

right and left faces

both right swing and left swing

both verniers

different parts of main scale

4. 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 225°

more than 180° but not more than 270°

less than 180°

5. 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

120 m

6 chains

180 m

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

planimeter

graphometer

theodolite

clinometer

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

Inverted curve

C-curve

Radial curve

French curve

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

invar tape

chain

steel tape

metallic tape

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

none of these

ranging

direct ranging

indirect ranging

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

Foot screws

Contour dams

Level vials

Contour maps

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

astronomical survey

geodetic survey

circular curve ranging

tachometric survey

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

Watershed line

Catchment line

Dam line

Ridge line

13. A contour line joins all the points having

equal elevation

similar reference points

zero elevation

equal vertical angles

14. 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

15. Theory of probability is applied to

cumulative errors only

both accidental and cumulative errors

accidental errors only

none of these

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

45°

20°

30°

60°

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

by deflection angles

repetition

reiteration

double precision

18. Theodolite is an instrument used for measuring

(c) both (a) and (b)

(b) vertical angle

(d) none of these

(a) horizontal angle

19. 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

20. Geodetic surveying is different from plane surveying because of

undulations of the topography

the curvature of the earth

coverage of very large area

the large difference of elevations between various points

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

chords

independent coordinates

Both of these

consecutive coordinates

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

Graphical method

theodolite correction

transit rule

bowditch rule

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

radial offset

offset from chord produced

successive bisection of arcs

perpendicular offset

24. A metallic tape is made of

invar

steel

cloth and wires

linen

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

tie line

base line

all of these

check line

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

angles and distances from transit stations

angles from two transit stations

angle from one transit station and distance from the other one

distances from two transit stations

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

optical square

alidade

abney level

ceylon ghat tracer

28. How many methods of contouring are present?

4

2

3

5

29. Contours can be found in a _________________ map.

Political

Physical

Topographical

Thematic

30. 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

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

Back scattering method

Traversing method

Intersection method

Radiation method

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

16

10

4

64

33. Indirect methods uses how many methods?

6

2

4

3

34. The main object of running a tie line is

to check accuracy of work

none of these

to take offsets for detailed surveying

to take details of nearby objects

35. An invar tape is made of an alloy of

nickel and steel

brass and nickel

brass and steel

copper and steel

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

both of these

none of these

same

different

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

U-shaped

V-shaped

L-shaped

S-shaped

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

180

200

150

100

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

cross staff

optical square

oblique offsets

perpendicular offsets

40. The error due to bad ranging is

cumulative; positive

cumulative; positive or negative

compensating

cumulative; negative

Surveying MCQs Set-3

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