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

The correction for sag is_________________?

A. always additive

B. always subtractive

C. always zero

D. sometimes additive and sometimes subtractive

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

The angle of intersection of the two plane mirrors of an optical square is______________?

A. 30°

B. 45°

C. 60°

D. 90°