Which of the following errors cannot be eliminated by taking both face observations ?

Surveying 25/04/2021

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:

    The correction for sag is_________________?
    A. always additive B. always subtractive C. always zero D. sometimes additive and sometimes subtractive...
    The maximum tolerance in a 20 m chain is_______________?
    A. ±2 mm B. ±3 mm C. ±5 mm D. ±8 mm...
    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...
    The rise and fall method_______________?
    A. is less.accurate than height of instrument method B. is not suitable for levelling with tilting levels C. provides a check on the reduction of intermediate point levels D. quicker and less tedious for large number of intermediate sights...
    In the cross-section method of indirect contouring, the spacing of cross-sections depends upon_____________?
    1. contour interval 2. scale of plan 3. characteristics of ground The correct answer is ? A. only (1) B. (1) and (2) C. (2) and (3) D. (1), (2) and (3)...

Leave a Reply

Your email address will not be published. Required fields are marked *