Surveying MCQ Questions & Answers

31

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

A) decreases B) increases C) remains unaffected D) none of the above

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Answer & Solution

Answer: Option A

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32

Direct method of contouring is

A) a quick method B) adopted for large surveys only C) most accurate method D) suitable for hilly terrains

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Answer & Solution

Answer: Option C

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33

The correction applied to the measured base of length ‘L’ is

A) Tension $$ = \frac{{\left( {{\text{P}} - {{\text{P}}_{\text{s}}}} \right){\text{L}}}}{{{\text{AE}}}}$$ B) Sag $$ = \frac{{{{\text{L}}^3}{{\text{w}}^2}}}{{24{{\text{P}}^2}}}$$ where w is the weight of tape/m C) Slope $$ = \frac{{{{\text{h}}^2}}}{{2{\text{L}}}} + \frac{{{{\text{h}}^4}}}{{8{{\text{L}}^3}}}$$ where h is height difference of end supports D) Reduction to mean sea level $$ = \frac{{{\text{Lh}}}}{{\text{R}}}$$ E) All the above

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Answer & Solution

Answer: Option E

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34

The shortest distance between two places measured along the surface of the earth, is

A) Length of the equator between their longitudes B) Length of the parallel between their longitudes C) Length of the arc of the great circle passing through them D) None of these

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Answer & Solution

Answer: Option C

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35

Longitude of a place is the angular distance between the meridian of the place and

A) The standard meridian B) The International Date Line C) That of Greenwich D) Both (A) and (C) of above

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Answer & Solution

Answer: Option D

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36

If the altitudes of a star at its upper and lower transits are 60° 30' and 19° 30' respectively, the latitude of the place, is

A) 60° B) 35° C) 40° D) 45°

Discuss

Answer & Solution

Answer: Option C

Solution:

Correct Answer: Option C: 40°

Explanation:

The latitude ($\phi$) of a place can be determined using the formula:

\[ \phi = \frac{\text{Altitude at Upper Transit} + \text{Altitude at Lower Transit}}{2} \]

Given:

Upper Transit Altitude = 60° 30'

Lower Transit Altitude = 19° 30'

\[ \phi = \frac{(60° 30') + (19° 30')}{2} \]

Converting minutes:

\[ \phi = \frac{(60.5 + 19.5)}{2} = \frac{80}{2} = 40° \]

Thus, the latitude of the place is 40°.

37

The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The latitude of the place, is

A) 80° B) 70° C) 60° D) 40°

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Answer & Solution

Answer: Option D

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38

Triangulation surveys are carried out for locating

A) Control points for surveys of large areas B) Control points for photogrammetric surveys C) Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc. D) All the above

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Answer & Solution

Answer: Option D

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39

For plane ground the scale of a vertical photograph will be same as that of a tiled photograph along the photo parallel through

A) Isocenter B) Plumb point C) Principal point D) None of these

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Answer & Solution

Answer: Option A

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40

If the general ground level of any area is 10% of the flying height, the principal points may be used as the centers of radial directions for small scale mapping even in tilted photograph up to

A) 1° B) 2° C) 3° D) 4°

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Answer & Solution

Answer: Option C

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Surveying MCQ Questions & Answers | Civil Engineering