Surveying MCQs Set-3

Page 1 of 4

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

steel tape

invar tape

metallic tape

chain

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

French curve

C-curve

Radial curve

Inverted curve

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

radial offset

perpendicular offset

offset from chord produced

successive bisection of arcs

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

30°

60°

20°

45°

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

Intersection method

Back scattering method

Traversing method

Radiation method

6. 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

GTS benchmarks

permanent benchmarks

arbitrary benchmarks

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

tachometric survey

geodetic survey

circular curve ranging

astronomical survey

8. Geodetic surveying is different from plane surveying because of

undulations of the topography

coverage of very large area

the curvature of the earth

the large difference of elevations between various points

9. How many methods of contouring are present?

4

5

2

3

10. 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

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11. '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

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

100

180

150

200

13. 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°

less than 180°

more than 180° but not more than 270°

more than 180° but not more than 225°

14. A metallic tape is made of

linen

invar

steel

cloth and wires

15. A contour line joins all the points having

equal vertical angles

zero elevation

equal elevation

similar reference points

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

Indirect method is less accurate but is faster

Direct method is most accurate but is slow

Direct method is expensive

Indirect method is relatively more expansive

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

Graphical method

transit rule

bowditch rule

theodolite correction

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

angles from two transit stations

distances from two transit stations

angles and distances from transit stations

angle from one transit station and distance from the other one

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

1500 sq km

500 sq km

80 sq km

260 sq km

20. The error due to bad ranging is

compensating

cumulative; negative

cumulative; positive or negative

cumulative; positive

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21. Theory of probability is applied to

cumulative errors only

both accidental and cumulative errors

none of these

accidental errors only

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

tie line

check line

all of these

base line

23. 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

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

optical square

ceylon ghat tracer

alidade

abney level

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

V-shaped

S-shaped

L-shaped

U-shaped

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

Watershed line

Ridge line

Dam line

Catchment line

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

indirect ranging

direct ranging

none of these

ranging

28. Contours can be found in a _________________ map.

Thematic

Physical

Topographical

Political

29. An invar tape is made of an alloy of

brass and steel

nickel and steel

brass and nickel

copper and steel

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

by deflection angles

reiteration

double precision

repetition

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

perpendicular offsets

oblique offsets

optical square

cross staff

32. Theodolite is an instrument used for measuring

(a) horizontal angle

(b) vertical angle

(c) both (a) and (b)

(d) none of these

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

residual error

true error

weighted observation

conditional error

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

clinometer

graphometer

planimeter

theodolite

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

independent coordinates

consecutive coordinates

chords

Both of these

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

Contour maps

Level vials

Foot screws

Contour dams

37. 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

38. Indirect methods uses how many methods?

3

6

4

2

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

none of these

different

both of these

same

40. 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

Surveying MCQs Set-3

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