# Civil Engineering - UPSC Civil Service Exam Questions

1.

Consider the following statements :
A critical activity in a CPM network has
1. The longest duration of all activities
2. zero total float
3. zero for float
4. The shortest duration of all activities
which one of the statements given above are correct ?

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

Explanation:

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2.

Which one of the following is the correct statement ? A heterotroph is an organism that obtains

 A. its cell carbon from an inorganic source. B. its energy from the oxidation of simple inorganic compounds. C. its cell carbon as well as its energy from organic matter. D. its energy from a natural ecosystem.

Explanation:

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3.

Which one of the following sections performs better on the ductility criterion ?

 A. Balanced section B. Over-reinforced section C. Under-reinforced section D. Non-prismatic section

Explanation:

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4.

Westergaard's formula for vertical stress gives greater value of stress than that by the Boussinesq's formula, when r/z exceeds :

 A. 1.5 B. 2.5 C. 3.5 D. 4

Explanation:

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5.

A round steel bar of overall length 40 cm consists of two equal portions of 29 cm each having diameters of 10 cm and 8 cm respectively. If the rod is subjected to a tensile load of 10 tones, the elongation will be given by :(E = 2 x 106 kg/cm2)

 A. 1/10π (1/25 + 1/16) cm B. 2/10π (1/25 + 1/16) cm C. 3/10 π (1/25 + 1/16) cm D. 4/10 π (1/25 + 1/16) cm