Which of the following errors can be neutralised by setting the level midway between the two stations ?

The correction for sag is_________________?

A. always additive

B. always subtractive

C. always zero

D. sometimes additive and sometimes subtractive

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

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

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

A. 20°

B. 30°

C. 45°

D. 60°

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. 180m