For accurate work, the lengths of back sight and fore sight are kept unequal.

Related MCQs

• Fore bearing of line Ab is S35’W calculate its back bearing.
• Back bearing of line Ab is 185’, calculate its fore bearing.
• If the fore bearing of a line is N 26? 35' W, its back bearing will be
• If the fore bearing of a line is 36? 15', its back bearing will be
• 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
• If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is
• The R.L, of the point A which is on the floor is 100 m and back sight reading on A is 2.455 m. If the foresight reading on the point B which is on the ceiling is 2.745 m, the R.L. of point B will be
• A back sight indicates the
• If the fore bearing of a line is
• For accurate work, the steel band should always be used in preference to chain because the steel band