# Civil Engineering - UPSC Civil Service Exam Questions

1.

The moment of inertia of a given rectangular area is minimum about

 A. its longer centroidal axis B. its polar axis C. its axis along the diagonal D. its shorter centroidal axis

Explanation:

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2.

If the efficiencies of BOD removal of first-stage and second-stage trickling filters are each 65.0%, then what is the overall BOD removal efficiency of these filters ?

 A. 65% B. 77.25% C. 87.75% D. 92.6%

Explanation:

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3.

Which one of the following tests can be carried out at the construction site to determine the dynamic elastic properties of soil ?

 A. Block vibration test B. Dutch cone penetration test C. Standard penetration test D. Vane shear test

Explanation:

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4.

A particle moves with simple harmonic motion. If its acceleration at distance 'D' from the equilibrium position is 'A' then the period of the motion is given by

 A. 2πAD B. C. D. Explanation:

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5.

Consider the following statements :
A high lime content in a composite cement-lime mortor results in
1. slow hardening.
2. quick setting.
3. weaker mortar.
Of these statements :

 A. 2 and 3 are correct B. 1 and 2 are correct C. 1 and 3 are correct D. 1, 2 and 3 are correct