Question

A dumpy level is set up with its eyepiece vertically over a peg A. The height from the top peg at the center of the eyepiece is 1.540 m and the reading of peg B is 0.705 m. The level is then set over B. The height of the eyepiece above peg B is 1.490 m and a reading on A is 2.195 m. The difference in level between A and B is____.

• A. 3.030 m
• B. 2.900 m
• C. 0.785 m
• D. 0.770 m

Answer 1

The correct option is D 0.770 m


$(RL{)}_B=(RK{)}_A+1.540-0.705$

$(RL{)}_B-(RL{)}_B=0.835$



$(RL{)}_A=(RL{)}_B+1.490-2.195$

$(RL{)}_B-(RL{)}_A=0.705$

$Avg.differenceinlevel=\frac{0.835+0.705}{2}=0.770m$