# Civil Engineering - UPSC Civil Service Exam Questions

16.

A seamless pipe with 80 cm diameter carries a fluid under a pressure of 2 N/mm2. If the permissible tensile stress is 100 N/mm2, the minimum required thickness of the pipe is

 A. 2 mm B. 4 mm C. 8 mm D. 16 mm

Explanation:

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17.

A simply supported beam of span l and flexural rigidity EI, carries a unit point load at its centre. The strain energy in the beam due to bending is

 A. B. C. D.

Explanation:

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18.

A beam carries a uniformly distributed load throughout its length. In which of the following configurations will the strain energy be maximum ?

 A. Cantilever B. Simply supported beam C. Propped cantilever D. Fixed beam

Explanation:

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19.

If carbon monoxide is released at the rate of 0.03 m3/min from a gasolene engine and 50 ppm is the threshold limit for an 8-hour exposure, the quantity of air which dilutes the contaminant to a safe level will be

 A. 60 m3/min B. 600 m3/min C. 600 m3/s D. 60 m3/s

Explanation:

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20.

Consider the following factors :
1. Provision of a suitable slope to the top of the sill.
2. Proper throating of the sill to throw off the water outside.
3. Giving a projection of not less than 50 mm to the sill.
4. Providing damp-proof course below the sill to check the entry of moisture inside the main wall.
Those considered while constructing a brick sill would include

 A. 1 and 2 B. 1, 3 and 4 C. 2, 3 and 4 D. 1, 2, 3 and 4