Answered: Instrument near Staff readings A B RL.…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

solve a and b given asap.

a) In a two-peg test of a dumpy level, the following readings were taken:

Instrument at R, mid-way Staff readings between pegs P and Q:

at P 1.525 m

at Q 1.230 m

Instrument near P:

at P 1.420 m

at Q 1.025 m

How much is the line of collimation inclined upwards or downwards? What should be the correct staff reading at Q with the instrument near P to keep the line of collimation truly horizontal?

b) Two pegs A and B are driven 100.0 m apart. In the adjustment of a dumpy level,

following observations were recorded:

observations given in the image.

State whether the instrument is in adjustment. Find the R.L. of B.

Instrument near
Staff readings on
A
В
R.L. (m)
A
1.520
1.535
80.00
B
1.595
1.580

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