Surveying MCQ Questions & Answers

31

For a line AB

A) the forebearing of AB and back bearing of AB differ by 180° B) the forebearing of AB and back bearing of BA differ by 180° C) both (A) and (B) are correct D) none is correct

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Answer & Solution

Answer: Option A

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32

Pick up the incorrect statement from the following. The angular distance of heavenly bodies on observer's meridian measured from the pole, is

A) Co-declination B) Co-altitude C) Co-latitude D) Polar distance

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Answer & Solution

Answer: Option A

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33

Detailed plotting is generally done by

A) radiation B) traversing C) resection D) all of the above

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Answer & Solution

Answer: Option A

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34

The station pointer is generally used in

A) Triangulation surveying B) Astronomical surveying C) Hydrographical surveying D) Photogrammetric surveying

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Answer & Solution

Answer: Option C

Solution:

The station pointer is an instrument commonly used in hydrographical surveying.

It is used to plot the position of a vessel by observing angles between three known points, such as landmarks, on a chart.

This method helps in determining the precise location of the survey station in relation to the known points on the shoreline or other fixed objects.

35

Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

A) error due to eccentricity of verniers B) error due to displacement of station signals C) error due to wrong adjustment of line of collimation and trunnion axis D) error due to inaccurate graduation

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Answer & Solution

Answer: Option B

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36

The negative sign is assigned to

A) Reduction to mean sea level B) Correction for horizontal alignment C) Correction for slope D) All the above

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Answer & Solution

Answer: Option D

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37

The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is

A) $$\frac{{\text{f}}}{{{\text{H}}\sec \theta }}$$ B) $$\frac{{{\text{f}}\sec \theta }}{{\text{H}}}$$ C) $$\frac{{\text{f}}}{{\text{H}}}$$ D) $$\frac{{\text{f}}}{{{\text{H}}\cos \frac{1}{2}\theta }}$$

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Answer & Solution

Answer: Option B

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38

The altitude of a heavenly body is its angular distance, measured on the vertical circle passing through the body, above

A) Equator B) Horizon C) Pole D) None of these

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Answer & Solution

Answer: Option B

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39

‘H’ is the flying height above mean ground level and ‘f’ is the principal distance of a vertical photograph. The mean scale of the photographs is

A) H × f B) $$\frac{{\text{H}}}{{\text{f}}}$$ C) $$\frac{{\text{f}}}{{\text{H}}}$$ D) H + f

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Answer & Solution

Answer: Option C

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40

Which of the following errors can be neutralised by setting the level midway between the two stations ?

A) error due to curvature only B) error due to refraction only C) error due to both curvature and re-fraction D) none of the above

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Answer & Solution

Answer: Option C

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Surveying MCQ Questions & Answers | Civil Engineering