Civil Engineering - Online Test
Q1. Two independent random variables X and Y are uniformly distributed in the interval [–1,1]. The probability that max[X, Y] is less than 1/2 is
Answer : Option B
Explaination / Solution:
Q2. A simply supported beam is subjected to a uniformly distributed load. Which one of the
following statements is true?
Answer : Option B
Explaination / Solution:
Q3. In the consolidated undrained triaxial test on a saturated soil sample, the pore water
pressure is zero
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. The staff reading taken on a workshop floor using a level is 0.645 m. The inverted staff
reading taken to the bottom of a beam is 2.960 m. The reduced level of the floor is
40.500 m. The reduced level (expressed in m) of the bottom of the beam is
Answer : Option A
Explaination / Solution:
RL of bottom of beam = 40.5+2.96+0.645 = 44.105m
Q5. A 4 m wide rectangular channel, having bed slope of 0.001 carries a discharge of
16 m3 /s. Considering Manning's roughness coefficient = 0.012 and g = 10 m/s2 , the
category of the channel slope is
Answer : Option B
Explaination / Solution:
Given discharge (Q) = 16 m3 / sec.
Bed slope (S) = 0.001
Manning‟s roughness coefficients (n) =0.012
g= 10m/s2
Width (B) =4m
Channel is wide rectangular
Area (A) = B. y
Perimeter (P) =B
Hydraulic Radius (R) = A/P = By/B = y
Q6. A two lane, one-way road with radius of 50 m is predominantly carrying lorries with
wheelbase of 5 m. The speed of lorries is restricted to be between 60 kmph and 80
kmph. The mechanical widening and psychological widening required at 60 kmph are
designated as wme,80 and wps,80, respectively. The mechanical widening and
psychological widening required at 80 kmph are designated as and wme,80 and wps,80, respectively. The correct values of wme,60, wps,60 respectively are
Answer : Option B
Explaination / Solution:
Q7. If 
, then the value of xx is
, then the value of xx is
Answer : Option A
Explaination / Solution:
Q8. An isolated 3-h rainfall event on a small catchment produces a hydrograph peak and point of
inflection on the falling limb of the hydrograph at 7 hours and 8.5 hours respectively, after
the start of the rainfall. Assuming, no losses and no base flow contribution, the time of
concentration (in hours) for this catchment is approximately
Answer : Option D
Explaination / Solution:
For small catchment, time of concentration is equal to lag time of peak flow.
Tc =7−1.5=5.5h
Q9. A planar truss tower structure is shown in the figure.
Consider the following statements about the external and internal determinacies of the truss.
(P) Externally Determinate
(Q) External Static Indeterminacy = 1
(R) External Static Indeterminacy = 2
(S) Internally Determinate
(T) Internal Static Indeterminacy = 1
(U) Internal Static Indeterminacy = 2
Which one of the following options is correct?
Answer : Option A
Explaination / Solution:
Q10. The following observations are made while testing aggregate for its suitability in pavement
construction:
i. Mass of oven-dry aggregate in air = 1000 g
ii. Mass of saturated surface-dry aggregate in air = 1025 g
iii. Mass of saturated surface-dry aggregate under water = 625 g
Based on the above observations, the correct statement is
Answer : Option A
Explaination / Solution:
Mass of oven dry aggregate wa = 1000g 
Mass of water in saturated surface dry aggregate = ww
