The multiplying constant of a tacheometer is
How many types of variations in declination are there?
A series of closely spaced contour lines on a topographic map represents a
Determine the probable error (in m) in the circumference of a circle of radius 16.5 m with probable error in the radius of ±0.35 m.
Which of the following errors comes under personal errors?
In levelling, if the sum of back sight and fore sight is 1.365 and 0.875 m and reduced level of B.M. is 100 m. then reduced level of end point will be-
While running a line of levels from a benchmark of RL 23.47 m to another benchmark of RL 23.5 m, it was observed that the sum of backsights is 16.26 m. What should be the sum of the foresights?
A level setup near A reads 1.400 m at A and 0.870 m at B. Again when it is kept close to B, it reads 1.350 m at A and 0.800 m at B. If the reduced level of station A is 115 m, what is the reduced level of station B?
The difference in height between two points whose parallax difference is 0.6 mm on a pair of stereo images taken from a height of 75 m. If the radial distance on the photo from the principal point to the displaced image point is 90 mm, the flying height is
A levelling instrument is set up at a point, and a backsight is taken on a benchmark on the top of a roof, which is -1.04 m. The benchmark of the roof is at 100 m. The staff reading on the sill level is taken as 2.42 m. What is the reduced level (RL) of the sill?