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Test: Levelling - 1 - Civil Engineering (CE) MCQ


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10 Questions MCQ Test GATE Civil Engineering (CE) 2025 Mock Test Series - Test: Levelling - 1

Test: Levelling - 1 for Civil Engineering (CE) 2024 is part of GATE Civil Engineering (CE) 2025 Mock Test Series preparation. The Test: Levelling - 1 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Levelling - 1 MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Levelling - 1 below.
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Test: Levelling - 1 - Question 1

A ‘level line’ is a

Detailed Solution for Test: Levelling - 1 - Question 1

A level line is the distance between 2 points on the level surface, which follows the curvature of the earth. Whereas the line of sight is the straight line perpendicular to the plumb line at the telescope.

Test: Levelling - 1 - Question 2

The difference between a level line and a horizontal line is that

Test: Levelling - 1 - Question 3

With the rise of temperature, the sensitivity of a bubble tube

Detailed Solution for Test: Levelling - 1 - Question 3

With a rise in temperature the liquid expands. Hence the bubble shortens and consequently its sensitivity decreases.

Test: Levelling - 1 - Question 4

As applied to staff readings, the corrections for curvature and refraction are respectively

Detailed Solution for Test: Levelling - 1 - Question 4

The curvature increases the staff reading, hence its correction is negative. The rays of light when passing through the atmosphere bend down and follows a curved path, hence correction is positive.

Correction due to curvature = -0.0785D2

Correction due to refraction = 0.0112D2

Combined correction = -0.0673D2

Test: Levelling - 1 - Question 5

Which of the following arithmetic checks can be applied in rise and fall method?

Test: Levelling - 1 - Question 6

The correction for refraction as applied to staff reading is 
where R is radius of earth

Detailed Solution for Test: Levelling - 1 - Question 6

Correction due to refraction is approximately about 1/7th of correction due to earth curvature.
CR = 1/7 Cc
= 1/7[d2/2R]

Test: Levelling - 1 - Question 7

While doing levelling in undulating terrain, it is preferable to set the level on

Test: Levelling - 1 - Question 8

Which of the following statements is incorrect?

Detailed Solution for Test: Levelling - 1 - Question 8

Test: Levelling - 1 - Question 9

Benchmark is established by

Test: Levelling - 1 - Question 10

The curvature of the earth’s surface, is taken into account only if the extent of survey is more than

Detailed Solution for Test: Levelling - 1 - Question 10

Geodetic Survey is the survey in which earth’s curvature is taken into account for calculation. It is generally done when area to be covered is more than 260 km2

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