# Civil Engineering - UPSC Civil Service Exam Questions

1.

A saturated clay stratum of thickness 10 m, bounded on top and bottom by medium coarse sand layers, has a coefficient of consolidation of 0.002 cm2/s. If this stratum is subjected to loading, it is likely that it would undergo 50% of its primary consolidation in

 A. 1136 days B. 227 days C. 284 days D. 568 days

Explanation:

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2.

In a plane truss, if 'M' is the number of members, 'R' is the number of reactions and 'J' is the number of joints, then for this truss to be determinate

 A. J = M + R B. J = 2M + R C. 3J = M + 2R D. 2J = M + R

Explanation:

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3.

Which one of the following methods is generally considered the best for tunnel ventilation ?

 A. Driving a drift through the tunnel B. 'Blow in' method C. 'Blow out' method D. Combination of 'Blow in' and 'Blow out' methods

Explanation:

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4.

A circular shaft subjected to torsion undergoes a twist of 1° in a length of 120 cm. If the maximum shear stress induced is limited to 1000 kg/cm2 and if modulus of rigidity G = 0.8 x 106 kg/cm2, then the radius of the shaft should be

 A. π/18 B. 18/π C. π/27 D. 27/π

Explanation:

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5.

Which one of the following types of sleepers has the best shock absorbing capacity as well as dampening property ?

 A. CST sleeper B. Wooden sleeper C. Concrete sleeper D. Steel sleeper