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

Answer: Option A

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

Answer: Option B

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

Answer: Option C

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

Answer: Option A

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°

Answer: Option B

Explanation:

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