Deck 1: Surveying and Compass

Question 1

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

A)4 chains
B)6 chains
C)120 m
D)180°

Answer 1

6 chains

Question 2

A metallic tape is made of

A)steel
B)invar
C)linen
D)cloth and wires

Answer 2

cloth and wires

Question 3

For a well-conditioned triangle, no angle should be less than

A)20°
B)30°
C)45°
D)60°

Answer 3

30°

Question 4

The angle of intersection of the two plane mirrors of an optical square is

A)30°
B)45°
C)60°
D)90°

Question 5

The allowable length of an offset depends upon the

A)degree of accuracy required
B)method of setting out the perpendiculars and nature of ground
C)scale of plotting
D)all of the above

Question 6

Which of the following angles can be set out with the help of French cross staff?

A)45° only
B)90° only
C)either 45° or 90°
D)any angle

Question 7

Which of the following methods of offsets involves less measurement on the ground?

A)method of perpendicular offsets
B)method of oblique offsets
C)method of ties
D)all involve equal measurement on the ground

Question 8

The permissible error in chaining for measurement with chain on rough or hilly ground is

A)1 in 100
B)1 in 250
C)1 in 50°
D)1 in 1000

Question 9

The correction for sag is

A)always additive
B)always subtractive
C)always zero
D)sometimes additive and sometimes subtractive

Question 10

Cross staff is an instrument used for

A)measuring approximate horizontal angles
B)setting out right angles
C)measuring bearings of the lines
D)none of the above

Question 11

Normal tension is that pull which

A)is used at the time of standardising the tape
B)neutralizes the effect due to pull and sag
C)makes the correction due to sag equal to zero
D)makes the correction due to pull equal to zero

Question 12

Which of the following is not used in measuring perpendicular offsets ?

A)line ranger
B)steel tape
C)optical square
D)cross staff

Question 13

If the length of a chain is found to be short on testing, it can be adjusted by

A)straightening the links
B)removing one or more small circular rings
C)closing the joints of the rings if opened out
D)all of the above

Question 14

The maximum tolerance in a 20 m chain is

A)±2 mm
B)±3 mm
C)±5 mm
D)±8 mm

Question 15

For accurate work, the steel band should always be used in preference to chain because the steel band

A)is lighter than chain
B)is easier to handle
C)is practically inextensible and is not liable to kinks when in use
D)can be easily repaired in the field

Question 16

The length of a chain is measured from

A)centre of one handle to centre of other handle
B)outside of one handle to outside of other handle
C)outside of one handle to inside of other handle
D)inside of one handle to inside of other handle

Question 17

Select the incorrect statement.

A)The true meridians at different places are parallel to each other.
B)The true meridian at any place is not variable.
C)The true meridians converge to a point in northern and southern hemispheres.
D)The maps prepared by national survey departments of any country are based on true meridi

Question 18

If the true bearing of a line AB is 269° 30°, then the azimuth of the line AB is

A)0° 30°
B)89° 30°
C)90° 30°
D)269° 30°

Question 19

In the prismatic compass

A)the magnetic needle moves with the box
B)the line of the sight does not move with the box
C)the magnetic needle and graduated circle do not move with the box
D)the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction

Question 20

For a line AB

A)the forebearing of AB and back bearing of AB differ by 180°
B)the forebearing of AB and back bearing of BA differ by 180°
C)both (a) and (b) are correct.
D)none is correct

Question 21

Local attraction in compass surveying may exist due to

A)incorrect levelling of the magnetic needle
B)loss of magnetism of the needle
C)friction of the needle at the pivot
D)presence of magnetic substances near the instrument

Question 22

In the quadrantal bearing system, a whole circle bearing of 293° 30° can be expressed as

A)W23°30°N
B)N66°30°W
C)S113°30°N
D)N23°30°W

Question 23

The prismatic compass and surveyor's compass

A)give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively
B)both give QB of a line and WCB of a line
C)both give QB of a line
D)both give WCB of a line

Question 24

The horizontal angle between the true meridian and magnetic meridian at a place is called

A)azimuth
B)declination
C)local attraction
D)magnetic bearing

Question 25

A negative declination shows that the magnetic meridian is to the

A)eastern side of the true meridian
B)western side of the true meridian
C)southern side of the true meridian
D)none of the above