Agate cap is fitted with a_________________?
(A) cross staff
(B) level
(C) chain
(D) prismatic compass
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
Which of the following errors cannot be eliminated by taking both face observations ?
(A) error due to horizontal axis not being perpendicular to the vertical axis
(B) index error i.e. error due to imperfect adjustment of the vertical circle vernier
(C) error due to non-parallelism of the axis of telescope level and line of collimation
(D) none of the above
In the double application of principle of reversion, the apparent error is_______________?
(A) equal to true error
(B) half the true error
(C) two times the true error
(D) four times the true error
If a tripod settles in the interval that elapses between taking a back sight reading and the following foresight reading, then the elevation of turning point will_________________?
(A) increase
(B) decrease
(C) not change
(D) either ‘a’ or ‘b’
A’level line’is a______________?
(A) horizontal line
(B) line parallel to the mean spheriodal surface of earth
(C) line passing through the center of cross hairs and the center of eye piece
(D) line passing through the objective lens and the eye-piece of a dumpy or tilting level
The rise and fall method of levelling provides a complete check on_______________?
(A) backsight
(B) intermediate sight
(C) foresight
(D) all of the above
In an internal focussing type of telescope, the lens provided is_______________?
(A) concave
(B) convex
(C) plano-convex
(D) plano-concave
The error due to eccentricity of inner and outer axes can be eliminated by________________?
(A) reading both verniers and taking the mean of the two
(B) taking both face observations and taking the mean of the two
(C) double sighting
(D) taking mean of several readings distributed over different portions of the graduated circle
The adjustment of horizontal cross hair is required particularly when the instrument is used for_____________?
(A) leveling
(B) prolonging a straight line
(C) measurement of horizontal angles
(D) all of the above