Civil Engineering - Online Test
Q1. For a sample of dry, cohesionless soil with friction angle, Φ , the failure plane will
be inclined to the major principal plane by an angle equal to
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. For the truss shown in the figure, the force in the member QR is
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. If E denotes expectation, the variance of a random variable X is given by
Answer : Option A
Explaination / Solution:
The variance of a random variable x is given by
E X − E X
Q4. Determine the correctness or otherwise of the following Assertion [A] and the
Reason [R] :
Assertion :The crown of the outgoing larger diameter sewer is always matched
with the crown of incoming smaller diameter sewer.
Reason : It eliminates backing up of sewage in the incoming smaller diameter
sewer
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. The major and minor principal stresses at a point are 3 MPa and -3 MPa
respectively. The maximum shear stress at the point is
Answer : Option B
Explaination / Solution:
No Explaination.
Q6. The following plot shows a function which varies linearly with x . The value of
the integral 
is
is
Answer : Option B
Explaination / Solution:
The given plot is straight line whose equation is
Q7. The 5-day BOD of a wastewater sample is obtained as 190 mg/L (with k = 0.01h-1). The ultimate oxygen demand (mg/L) of the sample will be
Answer : Option C
Explaination / Solution:
No Explaination.
Q8. The effective length of a column of length L fixed against rotation and translation
at one end and free at the other end is
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. For |x| << 1, coth (x) can be approximated as
Answer : Option C
Explaination / Solution:
Q10. A water treatment plant is required to process 28800 m3 /d of raw water
(density=1000 kg/m3, kinematic viscosity = 10-6 m2/s). The rapid mixing tank
imparts a velocity gradient of 900s-1 to blend 35 mg/L of alum with the flow for
a detention time of 2 minutes. The power input (W) required for rapid mixing is
Answer : Option D
Explaination / Solution:
No Explaination.
