The suitable contour interval for a map with scale 1 : 10000 is______________? A. 2 m B. 5m C. 10 m D. 20 m

If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to_______________? A. d B. 1/dC. d2 D. 1/d2

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…

With the rise of temperature, the sensitivity of a bubble tube______________? A. decreases B. increases C. remains unaffected D. none of the above

The difference between a level line and a horizontal line is that_______________? A. level line is a curved line while hori-zontal line is a straight line B. level line is normal to plumb line while horizontal line may not be…

The rise and fall method_______________? A. is less.accurate than height of instrument method B. is not suitable for levelling with tilting levelsC. provides a check on the reduction of intermediate point levels D. quicker and less tedious for large number…

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 onlyC. error due to both curvature and re-fraction D. none of…

If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be_______________? A. true R.L B. more than true R.LC. less than true R.L D. none of the above

The sensitivity of a bubble tube can be increased by________________? A. increasing the diameter of the tube B. decreasing the length of bubble C. increasing the viscosity of liquid D. decreasing the radius of curvature of tube

Refraction correction________________? A. completely eliminates curvature correctionB. partially eliminates curvature correction C. adds to the curvature correction D. has no effect on curvature correction