levelling

Which one of the following statements is TRUE with respect to levelling survey?

The height of the plane of collimation of a levelling instrument is 100.000 m from a datum. The levelling instrument measures a Back Sight of 1.500 m on a vertically held staff at...

For the traverse given below, the benchmark is at ground point L. The Reduced Level (RL) of L is 150.000 m. The direction of the traverse is from L to N. The readings on levelling...

Locations P and Q are separated by a wide valley. The difference in levels of locations P and Q measured by a levelling instrument stationed near P is 3.0 m. The same instrument st...

The following consecutive readings (in m) were taken with a dumpy level and a levelling staff at a common interval of 20 m: 0.385; 1.030; 1.925; 2.825; 3.730; 4.850; 1.045; 2.005;...

In levelling between two points A and B on the opposite banks of a river, the readings are taken by setting the instrument both at A and B, as shown in the table. If the RL of A is...

If the horizontal distance between a staff point and the point of observation is $d$, the error due to the curvature of earth is proportional to

In levelling between two points A and B on the opposite banks of a river, the readings are taken by setting the instrument both at $A$ and $B$, as shown in the table. If the $R L$...

What is the CORRECT match between the survey instruments/parts of instruments shown in the table and the operations carried out with them? Instruments/Parts of instruments P - Bubb...

Differential levelling is carried out from point P (BM: +200.000 m) to point R. The readings taken are given in the table. Staff readings (m) Points Back Sight Fore Sight Remarks P...

A bird is resting on a point P at a height of 8 m above the Mean Sea Level (MSL). Upon hearing a loud noise, the bird flies parallel to the ground surface and reaches a point Q whi...

What is the CORRECT match between the survey instruments/parts of instruments shown in the table and the operations carried out with them? Instruments/Parts of instruments Operatio...

A level instrument at a height of 1.320 m has been placed at a station having a Reduced Level (RL) of 112.565 m. The instrument reads –2.835 m on a levelling staff held at the bott...