Size of a theodolite is specified by________________?
A. the length of telescope
B. the diameter of vertical circle
C. the diameter of lower plate
D. the diameter of upper plate
If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated____________?
A. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
B. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate
C. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate
D. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate
For which of the following permanent adjustments of theodolite, the spire test is used ?
A. adjustment of plate levels
B. adjustment of line of sight
C. adjustment of horizontal axis
D. adjustment of altitude bubble and vertical index frame
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?
A. error due to eccentricity of verniers
B. error due to displacement of station signals
C. error due to wrong adjustment of line of collimation and trunnion axis
D. error due to inaccurate graduation
The cross hairs in the surveying telescope are placed_____________?
A. midway between eye piece and objec¬tive lens
B. much closer to the eye-piece than to the objective lens
C. much closer to the objective lens than to the eye piece
D. anywhere between eye-piece and objective lens
The adjustment of horizontal cross hair is required particularly when the instrument is used for_____________?
B. prolonging a straight line
C. measurement of horizontal angles
D. all of the above
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
In an internal focusing type of telescope, the lens provided is_______________?
The rise and fall method of levelling provides a complete check on_______________?
B. intermediate sight
D. all of the above
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