Mcq on Surveying

Civil Engineering - Surveying

d) all involve equal measurement on the

Multiple Choice Questions and

ground

Answers

Ans: a 5. The correction for sag is

1.

A metallic tape is made of

a) steel b) invar

a) always additive b) always subtractive

c) linen

c) always zero

d) cloth and wires

d) sometimes additive and sometimes

Ans: d

subtractive

2.

Ans: b

For a well-conditioned triangle, no

angle should be less than

6.

a) 20°

a) measuring approximate horizontal

b) 30°

angles

c) 45°

b) setting out right angles

d) 60°

c) measuring bearings of the lines

Ans: b

d) none of the above

3.

Ans: b

The angle of intersection of the two

Cross staff is an instrument used for

plane mirrors of an optical square is

7. Normal tension is that pull which

a) 30°

a) is used at the time of standardizing the

b) 45°

tape

c) 60°

b) neutralizes the effect due to pull and sag

d) 90°

c) makes the correction due to sag equal to

Ans: b

zero

4. Which of the following methods of offsets

d) makes the correction due to pull equal

involves less measurement on the ground?

to zero

a) method of perpendicular offsets

Ans: b

b) method of oblique offsets

8.

c) method of ties

measuring perpendicular offsets ?

Which of the following is not used in

a) line ranger

handle

b) steel tape

d) inside of one handle to inside of other

c) optical square

handle

d) cross staff

Ans: b

Ans: a

12.

9.

a) The true meridians at different places

If the length of a chain is found to be

Select the incorrect statement.

short on testing, it can be adjusted by

are parallel to each other.

a) straightening the links

b) The true meridian at any place is not

b) removing one or more small circular

variable.

rings

c) The true meridians converge to a point

c) closing the joints of the rings if opened

in northern and southern hemispheres.

out

d) The maps prepared by national survey

d) all of the above

departments of any country are based on

Ans: a

true meridians. Ans: a

10.

The maximum tolerance in a 20 m

13. In the prismatic compass

chain is

a) the magnetic needle moves with the box

a) ±2 mm

b) the line of the sight does not move with

b) ±3 mm

the box

c) ±5 mm

c) the magnetic needle and graduated

d) ±8 mm

circle do not move with the box

Ans: c

d) the graduated circle is fixed to the box

11.

and the magnetic needle always remains in

The length of a chain is measured from

a) centre of one handle to centre of other

the N-S direction

handle

Ans: c

b) outside of one handle to outside of other

14.

handle

a) the forebearing of AB and back bearing

c) outside of one handle to inside of other

of AB differ by 180°

For a line AB

b) the forebearing of AB and back bearing

line

of BA differ by 180°

c) both give QB of a line

c) both (a) and (b) are correct.

d) both give WCB of a line

d) none is correct

Ans: a

Ans: a

18.

15..

meridian and magnetic meridian at a place is

Local attraction in compass surveying

The horizontal angle between the true

may exist due to

called

a) incorrect levelling of the magnetic

a) azimuth

needle

b) declination

b) loss of magnetism of the needle

c) local attraction

c) friction of the needle at the pivot

d) magnetic bearing

d) presence of magnetic substances near

Ans: b

the instrument Ans: d

19.

16.

magnetic meridian is to the'

In the quadrantal bearing system, a

A negative declination shows that the

whole circle bearing of 293° 30' can be

a) eastern side of the true meridian

expressed as

b) western side of the true meridian

a) W23°30'N

c) southern side of the true meridian

b) N66°30'W

d) none of the above

c) S113°30'N

Ans: b

d) N23°30'W

20.

Ans: b

i) are inverted

17.

ii) are upright

The prismatic compass and surveyor's

The graduations in prismatic compass

compass

iii) run clockwise having 0° at south

a)

iv) run clockwise having 0° at north

give whole circle bearing (WCB) of a

line and quadrantal bearing (QB) of a line

The correct answer is

respectively

a) (i) and (iii)

b) both give QB of a line and WCB of a

b) (i) and (iv)

c) (ii) and (iii)

24. If the lower clamp screw is tightened

d) (ii) and (iv)

and upper clamp screw is loosened, the

Ans: a

theodolite may be rotated

21.

a) on its outer spindle with a relative

Theodolite is an instrument used for

a) tightening the capstan-headed nuts of

motion between the vernier and graduated

level tube

scale of lower plate

b) measurement of horizontal angles only

b) on its outer spindle without a relative

c) measurement of vertical angles only

motion between the vernier and gra-duated

d) measurement of both horizontal and

scale of lower plate

vertical angles

c) on its inner spindle with a relative

Ans: d

motion between the vernier and the

22.

graduated scale of lower plate

The process of turning the telescope

about the vertical axis in horizontal plane is

d) on its inner spindle without a relative

known as

motion between the vernier and the

a) transiting

graduated scale of lower plate

b) reversing

Ans: c

c) plunging

25.

d) swinging

a) vertical circle is to its right and the

Ans: d

bubble of the telescope is down

23.

b) vertical circle is to its right and the

Which of the following is not the

A telescope is said to be inverted if its

function of levelling head ?

bubble of the telescope is up

a) to support the main part of the

c) vertical circle is to its left and the

instrument

bubble of the telescope is down

b) to attach the theodolite to the tripod

d) vertical circle is to its left and the

c) to provide a means for leveling the

bubble of the telescope is up

theodolite

Ans: a

d) none of the above

26.

Ans: d

telescope are placed

The cross hairs in the surveying

a) midway between eye piece and

horizontal angle measurement ?

objective lens

a) error due to eccentricity of verniers

b) much closer to the eye-piece than to the

b) error due to displacement of station

objective lens

signals

c) much closer to the objective lens than to

c) error due to wrong adjustment of line of

the eye piece

collimation and trunnion axis

d) anywhere between eye-piece and

d) error due to inaccurate graduation

objective lens

Ans: b

Ans: b

30. The error due to eccentricity of inner and

27. For which of the following permanent

outer axes can be eliminated by

adjustments of theodolite, the spire test is

a) reading both verniers and taking the

used ?

mean of the two

a) adjustment of plate levels

b) taking both face observations and

b) adjustment of line of sight

taking the mean of the two

c) adjustment of horizontal axis

c) double sighting

d) adjustment of altitude bubble and

d) taking mean of several readings dis-

vertical index frame

tributed over different portions of the

Ans: c

graduated circle

28.

Ans: a

The adjustment of horizontal cross hair

is required particularly when the instrument

31.

is used for

a) horizontal line

a) leveling

b) line parallel to the mean spheriodal

b) prolonging a straight line

surface of earth

c) measurement of horizontal angles

c) line passing through the centre of cross

d) all of the above

hairs and the centre of eye piece

Ans: a

d) line passing through the objective lens

29.

and the eye-piece of a dumpy or tilting level

Which of the following errors is not

eliminated by the method of repetition of

A'level line'is a

Ans: b

32.

The rise and fall method of levelling

c) provides a check on the reduction of

provides a complete check on

intermediate point levels

a) backsight

d) quicker and less tedious for large

b) intermediate sight

number of intermediate sights

c) foresight

Ans: c

d) all of the above

36. If the staff is not held vertical at a

Ans: d

level¬ling station, the reduced level

33.

calculated from the observation would be

If the R.L. of a B.M. is 100.00 m, the

back- sight is 1.215 m and the foresight is

a) true R.L.

1.870 m, the R.L. of the forward station is

b) more than true R.L.

a) 99.345 m

c) less than true R.L.

b) 100.345 m

d) none of the above

c) 100.655m

Ans: c

d) 101.870m

37.

Ans: a

a) completely eliminates curvature

34.

correction

Height of instrument method of

Refraction correction

levelling is

b) partially eliminates curvature correction

a) more accurate than rise and fall method

c) adds to the curvature correction

b) less accurate than rise and fall method

d) has no effect on curvature correction

c) quicker and less tedious for large

Ans: b

number of intermediate sights

38. If the horizontal distance between the

d) none of the above

staff point and the point of observation is d,

Ans: c

then the error due to curvature of earth is

35.

proportional to

The rise and fall method

a) is less.accurate than height of

a) d

instrument method

b) 1/d

b) is not suitable for levelling with tilting

c) d2

levels

d) 1/d2

Ans: c

Ans: a

39. Which of the following statements is in-

42.

correct ?

a) inversely proportional to the scale of the

a) Error due to refraction may not be

map

completely eliminated by reciprocal

b) directly proportional to the flatness of

levelling.

ground

b) Tilting levels are commonly used for

c) larger for accurate works

precision work.

d) larger if the time available is more

c) The last reading of levelling is always a

Ans: a

foresight.

43.

d) All of the above statements are

surface of ground and preserving a constant

incorrect.

inclination to the horizontal is known as

Ans: d

a) contour line

40.

b) horizontal equivalent

Dumpy level is most suitable when

Contour interval is

An imaginary line lying throughout the

a) the instrument is to be shifted frequently

c) contour interval

b) fly levelling is being done over long

d) contour gradient

distance

Ans: d

c) many readings are to be taken from a

44.

single setting of the instrument

a) A contour is not necessarily a closed

d) all of the above

curve.

Ans: c

b) A contour represents a ridge line if the

41.

concave side of lower value con¬tour lies

The difference of levels between two

Select the correct statement.

stations A and B is to be determined. For

towards the higher value contour.

best results, the instrument station should be

c) Two contours of different elevations do

a) equidistant from A and B

not cross each other except in case of an

b) closer to the higher station

overhanging cliff.

c) closer to the lower station

d) All of the above statements are correct.

d) as far as possible from the line AB

Ans: c

45.

A series of closely spaced contour

The correct answer is

lines represents a

a) only (i)

a) steep slope

b) (i)and(ii)

b) gentle slope

c) (ii) and (iii)

c) uniform slope

d) (i), (ii) and (iii)

d) plane surface

Ans: d

Ans: a

49. Which of the following methods of con-

46.

touring is most suitable for a hilly terrain ?

Direct method of contouring is

a) a quick method

a) direct method

b) adopted for large surveys only

b) square method

c) most accurate method

c) cross-sections method

d) suitable for hilly terrains

d) tacheometric method

Ans: c

Ans: d

47.

50. Select the correct statement.

In direct method of contouring, the

process of locating or identifying points

a) Contour interval on any map is kept

lying on a contour is called

constant.

a) ranging

b) Direct method of contouring is

b) centring

cheap¬er than indirect method.

c) horizontal control

c)

d) vertical control

map cannot be ascertained.

Ans: d

d) Slope of a hill cannot be determined

Inter-visibility of points on a contour

with the help of contours. 48.

In the cross-section method of indirect

Ans: a

contouring, the spacing of cross-sections

51.

Closed contours, with higher value

depends upon

inwards, represent a

i) contour interval

a) depression

ii) scale of plan

b) hillock

iii) characteristics of ground

c) plain surface

d) none of the above

b) urban areas

Ans: b

c) hilly areas

52.

d) plains

Contour interval is

a) the vertical distance between two con-

Ans: c

secutive contours

56.

b) the horizontal distance between two

a) radiation

consecutive contours

b) traversing

c) the vertical distance between two points

c) resection

on same contour

d) all of the above

d) the horizontal distance between two

Ans: a

points on same contour

57.

Ans: a

a) Tracing paper method

53.

b) Bessels method

Benchmark is established by

Detailed plotting is generally done by

Three point problem can be solved by

a) hypsometry

c)

b) barometric levelling

d) all of the above

c) spirit levelling

Ans: d

d) trigonometrical levelling

58.

Ans: c

locations of the instrument station by

54.

drawing re sectors from the locations of the

The type of surveying which requires

Lehman's method

The process of determining the

least office work is

known stations is called

a) tacheomefry

a) radiation

b) trigonometrical levelling

b) intersection

c) plane table surveying

c) resection

d) theodolite surveying

d) traversing

Ans: c

Ans: c

55. Intersection method of detailed plotting

59.

is most suitable for

centering in plane table survey is

a) forests

a) spirit level

The instrument used for accurate

b) alidade

i) radiation

c) plumbing fork

ii) traversing

d) trough compass

iii) intersection

Ans: c

iv) resection

60.

The correct answer is

Which of the following methods of

plane table surveying is used to locate the

a) (i) and (ii)

position of an inaccessible point ?

b) (iii) and (iv)

a) radiation

c) (ii) and (iv)

b) intersection

d) (i) and (iii)

c) traversing

Ans: c

d) resection

64.

Ans: b

tripod, the main operations which are

61.

needed at each plane table station are

The two point problem and three point

After fixing the plane table to the

problem are methods of

i) levelling

a) resection

ii) orientation

b) orientation

iii) centering

c) traversing

The correct sequence of these operations is

d) resection and orientation

a) (i), (ii),.(iii)

Ans: d

b) (i), (iii), (ii)

62.

c) (iii), (i), (ii)

The resection by two point problem as

compared to three point problem

d) (ii), (Hi), (i)

a)

Ans: b

gives more accurate problem

b) takes less time

65.

c) requires more labour

theodolite traversing is suitable for locating

d) none of the above

the details which are far away from transit

Ans: c

stations ?

63.

a) measuring angle and distance from one

The methods used for locating the

plane table stations are

Which of the following methods of

transit station

b) measuring angles to the point from at least two stations c) measuring angle at one station and distance from other d) measuring distance from two points on traverse line Ans: b 101. The number of horizontal cross wires in a stadia diaphragm is a) one b) two c) three d) four Ans: c

66. For a tacheometer the additive and multi-plying constants are respectively a) 0 and 100 b) 100 and 0 c) 0 and 0 d) 100 and 100 Ans: a