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
Related Mcqs:
- Which of the following errors can be eliminated by taking mean of bot face observations ?
A. error due to imperfect graduations
B. error due to eccentricity of verniers
C. error due to imperfect adjustment of plate levels
D. error due to line of collimation not being perpendicular to horizontal axis - 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 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 - Which of the following errors can be neutralised by setting the level midway between the two stations ?
A. error due to curvature only
B. error due to refraction only
C. error due to both curvature and re-fraction
D. none of the above - 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’ - Which of the following is not used in measuring perpendicular offsets ?
A. line ranger
B. steel tape
C. optical square
D. cross staff - Which of the following is not the function of levelling head ?
A. to support the main part of the instrument
B. to attach the theodolite to the tripod
C. to provide a means for leveling the theodolite
D. none of the above - The following sights are taken on a “turning point”________________?
A. foresight only
B. backsight only
C. foresight and backsight
D. foresight and intermediate sight - Which of the following methods of con-touring is most suitable for a hilly terrain ?
A. direct method
B. square method
C. cross-sections method
D. tacheometric method - Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations ?
A. measuring angle and distance from one transit station
B. measuring angles to the point from at least two stations
C. measuring angle at one station and distance from other
D. measuring distance from two points on traverse line
