The cross hairs in the surveying telescope are placed_____________?
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?
Which of the following errors can be neutralised by setting the level midway between the two stations ?
If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be_______________?
The sensitivity of a bubble tube can be increased by________________?
Refraction correction________________?
As applied to staff readings, the corrections for curvature and refraction are respectively The above table shows a part of a level field book. The value of X should be________________?
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 following sights are taken on a “turning point”________________?
Which of the following errors can be eliminated by taking mean of bot face observations ?
