# GATE Questions & Answers of Distance and Angle Measurement - Levelling and Trigonometric Levelling

## What is the Weightage of Distance and Angle Measurement - Levelling and Trigonometric Levelling in GATE Exam?

Total 9 Questions have been asked from Distance and Angle Measurement - Levelling and Trigonometric Levelling topic of Surveying subject in previous GATE papers. Average marks 1.67.

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 bottom of a bridge deck. The RL (in m) of the bottom of the bridge deck is

The accuracy of an Electronic  Distance Measuring Instrument (EDMI) is specified as $\style{font-family:'Times New Roman'}{\pm(a\;\mathrm{mm}+b\;\mathrm{ppm})}$. Which one of the following statements is correct?

The staff reading taken on a workshop floor using a level is 0.645 m. The inverted staff reading taken to the bottom of a beam is 2.960 m. The reduced level of the floor is 40.500 m. The reduced level (expressed in m) of the bottom of the beam is

The vertical angles subtended by the top of a tower T at two instrument stations set up at P and Q, are shown in the figure. The two stations are in line with the tower and spaced at a distance of 60 m. Readings taken from these two stations on a leveling staff placed at the benchmark (BM = 450.000 m) are also shown in the figure. The reduced level of the top of the tower T (expressed in m) is _________

In a survey work, three independent angles $X,Y$ and $Z$ were observed with weights $W_{x,}\;W_{y,}\;W_y$ respectively. The weight of the sum of angles $X,Y$ and $Z$ is given by:

In a region with magnetic declination of 2ºE, the magnetic Fore bearing (FB) of a line AB was measured as N79º50' E. There was local attraction at A. To determine the correct magnetic bearing of the line, a point O was selected at which there was no local attraction. The magnetic FB of line AO and OA were observed to be S52º40'E and N50º20'W, respectively. What is the true FB of line AB ?

In a leveling work, sum of the Back Sight (B.S.) and Fore Sight (F.S.) have been found to be 3.085 m and 5.645 m respectively. If the Reduced Level (R.L.) of the starting station is 100.000 m, the R.L. (in m) of the last station is ______