# Civil Engineering - UPSC Civil Service Exam Questions

6.
Consider the following limitations :
1. Can be performed only on purely cohesionless soils
2. Plane of failure is predetermined
3. There is virtually no control on drainage
4. Non-uniform distribution of stresses
5. Principal stresses in the sample cannot be determined The limitations inherent in direct shear test include
1, 2 and 3
2, 3 and 4
3, 4 and 5
1, 2 and 5
Explanation:
No answer description is available. Let's discuss.

7.
Given that g = acceleration due to gravity and R = hydraulic mean depth, the Darcy Weisbach friction factor is related to Manning's rugosity coefficient 'n' as
Explanation:
No answer description is available. Let's discuss.

8.
A symmetrical circular arch of span 25 m with a central rise of 5 is hinged at crown and springings. It carries a point load on the arch in the span between the left hinge and central hinge. If the inclination of the thrust at the right hinge is θ measured from horizontal, then what is the value of tan θ ?
2.5
1.0
0.4
Not possible to calculate with given data
Explanation:
No answer description is available. Let's discuss.

9.
The combined motion of rotation and translation may be assumed to be a motion of pure rotation about some centre which goes on changing from time to time. The centre in question is known as
Shear centre
Meta centre
Instantaneous centre
Gravitational centre