Civil Engineering - Online Test
Q1. The laboratory test on a soil sample yields the following results: natural moisture content =
18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%.
The liquidity index and activity (as per the expression proposed by skempton ) of the soil,
respectively, are
Answer : Option A
Explaination / Solution:
Q2. A 1 m wide rectangular channel has a bed slope of 0.0016 and the Manning’s roughness
coefficient is 0.04. Uniform flow takes place in the channel at a flow depth of 0.5 m. At a
particular section, gradually varied flow (GVF) is observed and the flow depth is measured as
0.6 m. The GVF profile at that section is classified as
Answer : Option C
Explaination / Solution:
Q3. __________ with someone else’s email account is now very serious offence.
Answer : Option C
Explaination / Solution:
No Explaination.
Q4. The old concert hall was demolished because of fears that the foundation would be affected by
the construction tried to mitigate the impact of pressurized air pockets created by the excavation
of large amounts of soil. But even with these safeguards, it was feared that the soil below the
concert hall would not be stable.
From this, one can infer that
Answer : Option B
Explaination / Solution:
No Explaination.
Q5. It was decided to construct a fabric filter, using bags of 0.45 m diameter and 7.5 m
long, for removing industrial stack gas containing particulates. The expected rate of
airflow into the filter is 10m3 /s. If the filtering velocity is 2.0 m/min, the minimum
number of bags (rounded to nearest higher integer) required for continuous cleaning
operation is
Answer : Option B
Explaination / Solution:
Given, D=0.45m, L=7.5m
No. of fabric filter bags, 
Total area of filter (Af) = (10 × 60)/2 = 300m2
Area of one bag (Ab) = πdL = π×0.45×7.5 = 10.60m2
N = 300/10.60 = 28.28 ~ 29
Q6. The matrix 
is decomposed into a product of a lower triangular
matrix [L] and an upper triangular matrix [U]. The properly decomposed [L] and
[U] matrices respectively are
is decomposed into a product of a lower triangular
matrix [L] and an upper triangular matrix [U]. The properly decomposed [L] and
[U] matrices respectively are
Answer : Option D
Explaination / Solution:
[A] = [L][U] Option D is correct
Q7. An elastic bar of length L, uniform cross sectional area A, coefficient of thermal expansion
α, and Young’s modulus E is fixed at the two ends. The temperature of the bar is increased
by T, resulting in an axial stress σ. Keeping all other parameters unchanged, if the length of
the bar is doubled, the axial stress would be
Answer : Option A
Explaination / Solution:
σ varies with ∆T and does not depends upon the length of bar.
Q8. The queue length (in number of vehicles) versus
time (in seconds) plot for an approach to a
signalized intersection with the cycle length of 96
seconds is shown in the figure (not drawn to scale).
At time t = 0, the light has just turned red. The
effective green time is 36 seconds, during which
vehicles discharge at the saturation flow rate, s (in vph). Vehicles arrive at a uniform rate v (in vph), throughout the cycle. Which one of the following statements is TRUE?
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. Bull's trench kiln is used in the manufacturing of
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. The type of flood routing (Group I) and the equation(s) used for the purpose (Group
II) are given below.
Group I Group II
P. Hydrologic flood routing 1. Continuity equation
Q. Hydraulic flood routing 2. Momentum equation
3. Energy equation
The correct match is
Answer : Option B
Explaination / Solution:
No Explaination.
