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Test: Levelling - 3 - Civil Engineering (CE) MCQ


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10 Questions MCQ Test Topicwise Question Bank for Civil Engineering - Test: Levelling - 3

Test: Levelling - 3 for Civil Engineering (CE) 2024 is part of Topicwise Question Bank for Civil Engineering preparation. The Test: Levelling - 3 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Levelling - 3 MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Levelling - 3 below.
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Test: Levelling - 3 - Question 1

Subtense bar is an instrument used for

Test: Levelling - 3 - Question 2

Which one of the following gives the correct distance between the lighthouse and a ship, when the lighthouse whose height is 100 m is visible just above the horizon from the ship?

Detailed Solution for Test: Levelling - 3 - Question 2

If d is the distance to the visible horizon, it is given by,

‘C' being in metres,
∴ 

Test: Levelling - 3 - Question 3

Which of the following sights will be applicable for a change point?

Detailed Solution for Test: Levelling - 3 - Question 3

A change point is the point selected on the route before shifting the instrument. The change point is also called a turning point. The staff is kept on the turning point and a foresight is taken before shifting the instrument. The staff should not be moved when the instrument is being shifted. After the instrument has been shifted and set up at the new location, a back sight is taken on the staff still held at the change point.

Test: Levelling - 3 - Question 4

Curvature correction to a staff reading in a differential levelling survey is

Test: Levelling - 3 - Question 5

Which one of the following statements is not correct?

Detailed Solution for Test: Levelling - 3 - Question 5

Detailed Solution

Bench mark is a permanent reference point whose R.L is always known to us.

It is our first step to adjust the level for its temporary adjustment (centering, levelling) before start to take reading from a level.

Change point is a point which denotes shifting of level either due to inability to take reading or due to some obstruction

Test: Levelling - 3 - Question 6

The bubble tube parallel to the telescope of a theodolite should be more sensitive, since it controls.

Test: Levelling - 3 - Question 7

A line of levels was run from Bench Mark A (770.815) to a Bench Mark B (772.940). The sum of back sights was 32.665 m and sum of fore sights was 30,44 m. The closing error is (in m)

Detailed Solution for Test: Levelling - 3 - Question 7

RLB = RLA + ∑BS - ∑FS
RLB = 770.815 + 32.665 - 30.44
= 773.035
∴ Closing error = 773.035 - 772.940 = 0.10

Test: Levelling - 3 - Question 8

The RL of a classroom floor is 30.00 m and the staff reading on the floor is 1.40 m. The staff reading when, held inverted with the bottom touching the Tee beam of the roof is 3.67 m. The height of the beam above the floor is

Detailed Solution for Test: Levelling - 3 - Question 8

Height = staff reading on floor + inverted staff reading 
= 1.40 + 3.67 = 5.07 m

Test: Levelling - 3 - Question 9

The distance of visible horizon from a height of 36 m above mean sea level is given by

Test: Levelling - 3 - Question 10

If sensitivity of the bubble tube is 30" per 2 mm division then what would be the error in staff reading on a vertically held staff at a distance of 200 m when its bubble is out of centre by 2.5 divisions.

Detailed Solution for Test: Levelling - 3 - Question 10

The sensitivity of a bubble tube is given by 

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