# Civil Engineering - UPSC Civil Service Exam Questions

16.

In the force system shown in the figure, the force CA should be A. 5 t B. - 5 t C. 4 t D. - 4 t

Explanation:

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17.

A cylindrical shell made of mild steel plate of 100 cm diameter is to be subjected to an internal pressure of 10 kg/cm2. If the material yields at 2000 kg/cm2, assuming factor of safety as four and using maximum principal stress theory, thickness of the plate will be

 A. 5 mm B. 10 mm C. 15 mm D. 20 mm

Explanation:

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18.

A plot of land 60°m x 20 m is measure steel tape. If the standard error of length width measurements is taken as ± 1 cm, the standard error of the area of the plot be

 A. ± 0.1414 m2 B. ± 0.566 m2 C. ± 0.632 m2 D. ± 0.8484 m2

Explanation:

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19.

The graphical condition for equilibrium of concurrent forces is that

 A. both the force polygon and the funicular polygon must be closed figures B. funicular polygon should be a closed figure C. force polygon need not be a closed figure D. force polygon should be a closed figure

Explanation:

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20.

In a tilted aerial photograph, if the swing is 230°, then the rotation angle is equal to

 A. 140° B. 130° C. 50° D. 25°