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 ?
1 and 2
1 and 3
2 and 3
3 and 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
Which one of the following is the correct statement ? A heterotroph is an organism that obtains
its cell carbon from an inorganic source.
its energy from the oxidation of simple inorganic compounds.
its cell carbon as well as its energy from organic matter.
its energy from a natural ecosystem.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
Which one of the following sections performs better on the ductility criterion ?
Balanced section
Over-reinforced section
Under-reinforced section
Non-prismatic section
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
Westergaard's formula for vertical stress gives greater value of stress than that by the Boussinesq's formula, when r/z exceeds :
1.5
2.5
3.5
4.0
Answer: Option
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)
1/10π (1/25 + 1/16) cm
2/10π (1/25 + 1/16) cm
3/10 π (1/25 + 1/16) cm
4/10 π (1/25 + 1/16) cm
Answer: Option
Explanation:
No answer description is available. Let's discuss.