If the staff is not held vertical at a leveling station, the R.L. calculated from the observation would be

If the staff is not held vertical at a leveling station, the R.L. calculated from the observation would be 

Answer: less than true R.L.

Advantage of Height of instrument method of leveling is

Advantage of Height of instrument method of leveling is 

Answer: quicker and less tedious for large number of intermediate sights

Which of the following errors can be neutralized by setting the level midway between the two stations

Which of the following errors can be neutralized by setting the level midway between the two stations 

Answer: error due to both curvature and refraction

Refraction correction

Refraction correction 

Answer: partially eliminates curvature correction.

With the rise of temperature, the sensitivity of a bubble tube

With the rise of temperature, the sensitivity of a bubble tube 

Answer: decreases.

The rise and fall method provides a check on

The rise and fall method provides a check on 

Answer: the reduction of intermediate point levels.

If the R.L. of a B.M. is 100.00 m, the backsight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is

If the R.L. of a B.M. is 100.00 m, the backsight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is 

Answer: 99.345 m.

A Level Line is a line parallel to the

A Level Line is a line parallel to the 

Answer: mean spheroidal surface of earth.