# Civil Engineering - UPSC Civil Service Exam Questions

46.

The rigid portal frame shown in the given figure will not have any sidesway if
I1 = the moment of inertia of the column cross-section
I2 = the moment of inertia of the beam cross-section Explanation:

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47.

Two similar round bars A and B are each 30 cm long as shown in the given figure. The ratio of the energies stored by the bars A and B, is  A. 3/2 B. 1.0 C. 5/8 D. 2/3

Explanation:

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48.

Consider the following statements :
The effect of air entrainment in concrete is to
1. increase resistance to freezing and thawing.
2. improve workability.
3. decrease strength.
Which of these statements are correct ?

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

Explanation:

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49.

The state of stress at a point in a stressed element is shown in the given figure. The maximum tensile stress in the element will be A. 20 N/mm2 B. lO2 N/mm2 C. 10 N/mm2 D. zero

Explanation:

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50.

The shear modulus of a material is half of its Young's modulus. What is the value of its Poisson's ratio ?

 A. - 1 B. - 0.5 C. Zero D. 0.5