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
The angle of intersection of the two plane mirrors of an optical square is______________?
(A) 30°
(B) 45°
(C) 60°
(D) 90°
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
For a well-conditioned triangle, no angle should be less than______________?
(A) 20°
(B) 30°
(C) 45°
(D) 60°
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
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
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
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
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