Civil Engineering - Online Test
Q1. The Froude number of flow in a rectangular channel is 0.8. If te depth of flow is
1.5 m, the critical depth is
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. The matrix 
has three distinct eigenvalues and one of its eigenvectors is 
Which one of the following can be another eigenvector of A?
has three distinct eigenvalues and one of its eigenvectors is Which one of the following can be another eigenvector of A?
Answer : Option C
Explaination / Solution:
By the properties of Eigen values and Eigen vectors, another eigen vector of A is 
The eigen vectors corresponding to distinct eigen values of a real symmetric matrix are
orthogonal i.e., pair wise dot product is zero
Q3. The liquid limit (LL), plastic limit (PL) and shrinkage limit (SL) of a cohesive
soil satisfy the relation
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. The “Plane section remain plane” assumption in bending theory implies
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. A well of diameter 20 cm fully penetrates a confined aquifer. After a long period
of pumping at rate of 2720 litres per minute, the observations of drawdown taken
at m10 and m100 distances from the centre of the well are found to be m3 and
0 5. m respectively. The transmissivity of the aquifer is
Answer : Option B
Explaination / Solution:
No Explaination.
Q6. Consider the differential equation 
. There exists a
unique solution for this differential equation when t belongs to the interval
. There exists a
unique solution for this differential equation when t belongs to the interval
Answer : Option A
Explaination / Solution:
Q7. A footing 2m × 1m exerts a uniform pressure of 150 kN/m2 on the soil. Assuming
a load dispersion of 2 vertical to 1 horizontal, the average vertical stress (kN/m2) at 1.0 m below the footing is
Answer : Option A
Explaination / Solution:
No Explaination.
Q8. Two steel column P (length L and yield strength fy = 250MPa) and Q (length 2L
and yield strength fy = 500MPa) have the same cross-section and end condition.
The ratio of buckling load of column P to that of column Q is
Answer : Option D
Explaination / Solution:
Buckling load,
Q9. If the BOD3 of a wastewater sample is 75 mg L/ and reaction rate constant k
(base e) is 0.345 per day, the amount of BOD remaining in the given sample after
10 days is
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. A horizontal flow primary clarifier treats wastewater in which 10%, 60% and
30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s and 0.1 mm/s
respectively. What would be the total percentage of particles removed if clarifier
operates at a Surface Overflow Rate (SOR) of 43.2 m3 /m2 d?
Answer : Option B
Explaination / Solution:
No Explaination.
