reduced level

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...

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...

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 $R L$...

The longitudinal sections of a runway have gradients as shown in the table. End to end for sections of runway (m) 0 to 200 200 to 600 600 to 1200 1200 to 1600 1600 to 2000 Gradient...

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...

The longitudinal sections of a runway have gradients as shown in the table. End to end for sections of runway (m) Gradient (%) 0 to 200 +1.0 200 to 600 −1.0 600 to 1200 +0.8 1200 t...

Trigonometric levelling was carried out from two stations P and Q to find the reduced level (R. L.) of the top of hillock, as shown in the table. The distance between Stations P an...

Trigonometric levelling was carried out from two stations P and Q to find the reduced level (R. L.) of the top of hillock, as shown in the table. The distance between Stations P an...

A staff is placed on a benchmark (BM) of reduced level (RL) 100.000 m and a theodolite is placed at a horizontal distance of 50 m from the BM to measure the vertical angles. The me...

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...