Test: Levelling - 2


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10 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series | Test: Levelling - 2

Test: Levelling - 2 for Civil Engineering (CE) 2022 is part of GATE Civil Engineering (CE) 2023 Mock Test Series preparation. The Test: Levelling - 2 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Levelling - 2 MCQs are made for Civil Engineering (CE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Levelling - 2 below.
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Test: Levelling - 2 - Question 1

During levelling if back sight is more than foresight

Test: Levelling - 2 - Question 2

In reciprocal levelling, the error which is not completely eliminated, is due to

Test: Levelling - 2 - Question 3

Match List-I with List-ll and select the correct answer using the codes given below the lists:
List-I 
A. Reciprocal levelling
B. Trigonometrical levelling
C. Hypsometry
D. Profile levelling

List-ll
1. Involves measuring of horizontal distances and vertical angles in field
2. Involves the principle of boiling point of water variation with altitude
3. Involves observing elevations of a number of points along the centre line and their distance along it
4. Involves the principle of two peg test 

Test: Levelling - 2 - Question 4

The RL, of the point A which is on the floor is 100 m and back sight reading on A is 2.455 m. If the foresight reading on the point B which is one the ceiling is 2.745 m, the RL of point B will be

Detailed Solution for Test: Levelling - 2 - Question 4

Since the staff at the elevated point B on the ceiling is held vertically inverted
RL of B = RL of A + B.S.on A + FS on B
= 100 + 2.455 + 2.745 = 105.20 m

Test: Levelling - 2 - Question 5

The following consecutive readings were taken with a dumpy level:
0.635, 1.525, 2.395, 0.605, 0.805, 0.125 
The instrument was shifted after the third and fifth readings. The readings 2.395 and 0.635 respectively represents

Test: Levelling - 2 - Question 6

A level was set up at a point A and distance to the staff station B was 100 m. The net combined correction due to curvature and refraction as applied to the staff reading is

Detailed Solution for Test: Levelling - 2 - Question 6

Net combined correction
= -0.0673 d2. metres where d is in kms

Test: Levelling - 2 - Question 7

An observer standing on the deck of a ship just sees the top of a lighthouse which is 30 m above the sea level. If the height of the observer’s eye is 10 m above the sea level, then the distance of the observer from the lighthouse will be nearly

Test: Levelling - 2 - Question 8

If the staff intercept on a staff located at 100 m from the level for five division deviation of the bubble is 0.050 m and if the length of one division of the bubble is 2 mm, then the radius of curvature of the bubble tube is

Detailed Solution for Test: Levelling - 2 - Question 8

The radius of curvature of bubble is given by,

Test: Levelling - 2 - Question 9

Two points A and B are 1530 m apart across a river. The reciprocal levels measured are

The true difference in level between A and B would be

Detailed Solution for Test: Levelling - 2 - Question 9

True difference in levels,

Error in collimation adjustment

When the level is at A, the reading on the staff at A is correct. While reading on the staff at B is incorrect. When the level is at B, the reading on the staff at B is correct while reading on the staff at A is incorrect.
Correct readings are

Test: Levelling - 2 - Question 10

If the observed staff reading at a station is 800.925 m the correction due to refraction is 0.115 m and correction due to curvature is 0.805. Then the correct staff reading will be

Detailed Solution for Test: Levelling - 2 - Question 10

True staff reading = obs. staff reading - curve corr. + refr. corr.
= 800.925 - 0.805 + 0.115 
= 800.235 m

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