Civil Engineering - UPSC Civil Service Exam Questions

21. 

At a certain point in a structural member, there are perpendicular stresses 80 N/mm2 and 20 N/mm2, both tensile. What is the equivalent stress in simple tension, according to the maximum principal strain theory ? (Poisson's ratio = 0.25)

A. zero
B. 20 N/mm2
C. 60 N/mm2
D. 75 N/mm2

Answer: Option D

Explanation:

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22. 

Duration along the critical path defines which of the following ?
1. Shortest duration needed
2. Shortest duration permissible
3. Longest duration needed
4. Longest duration permissible
Select the correct answer using the code given below :

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

Answer: Option B

Explanation:

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23. 

A cantilever of constant depth carries a uniformly distributed load on the whole span. To make the maximum stress at all sections the same, the breadth of the section at a distance x from the free end should be proportional to

A. x
B. x
C. x2
D. x3

Answer: Option C

Explanation:

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24. 

Consider the following parameters related to a rotary intersection :
1. Width of the weaving section.
2. Length of the weaving section.
3. Proportion of weaving traffic.
4. Weaving angle.
5. Width of the carriageway at entry.
Capacity is generally expressed in terms of

A. 1, 2, 3 and 4
B. 1, 2, 3 and 5
C. 1, 2 and 3
D. 4 and 5

Answer: Option D

Explanation:

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25. 

Consider the following statements :
I. The intersection of the first and last ray in funicular diagram is on the line of action of the resultant.
II. Intersection of first and last ray in polar diagram gives the magnitude of the resultant.
Of these statements :

A. both I and II are true
B. I is false but II is true
C. I is true but II is false
D. both I and II are false

Answer: Option C

Explanation:

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