# 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
1136 days
227 days
284 days
568 days
Explanation:
No answer description is available. Let's discuss.

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
J = M + R
J = 2M + R
3J = M + 2R
2J = M + R
Explanation:
No answer description is available. Let's discuss.

3.
Which one of the following methods is generally considered the best for tunnel ventilation ?
Driving a drift through the tunnel
'Blow in' method
'Blow out' method
Combination of 'Blow in' and 'Blow out' methods
Explanation:
No answer description is available. Let's discuss.

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
π/18
18/π
π/27
27/π