CIVIL ENGINEERING

CIVIL ENGINEERING MCQs

1. The spot speeds (expressed in km/hr) observed at a road section are 66, 62, 45, 79, 32, 51, 56, 60, 53, and 49. The median speed (expressed in km/hr) is _________
Ans: 54.49 : 54.51

2. As per Indian standards for bricks, minimum acceptable compressive strength of any class of burnt clay bricks in dry state is
(A) 10.0 MPa (B) 7.5 MPa (C) 5.0 MPa (D) 3.5 MPa
Ans: D

3. A strip footing is resting on the surface of a purely clayey soil deposit. If the width of the footing is doubled, the ultimate bearing capacity of the soil
(A) becomes double (B) becomes half (C) becomes four-times (D) remains the same
Ans: D

4. The results of a consolidation test on an undisturbed soil, sampled at a depth of 10 m below the ground level are as follows:
Saturated unit weight : 16 kN/m3
Pre-consolidation pressure : 90 kPa
The water table was encountered at the ground level. Assuming the unit weight of water as 10 kN/m3, the over-consolidation ratio of the soil is
(A) 0.67 (B) 1.50 (C) 1.77 (D) 2.00
Ans: B

5. Water table of an aquifer drops by 100 cm over an area of 1000 km2 . The porosity and specific retention of the aquifer material are 25% and 5%, respectively. The amount of water (expressed in km3) drained out from the area is ______
Ans: 0.19 : 0.21

6. The atmospheric layer closest to the earth surface is
(A) the mesosphere (B) the stratosphere
(C) the thermosphere (D) the troposphere
Ans: D

7. A water supply board is responsible for treating 1500 m3/day of water. A settling column analysis indicates that an overflow rate of 20 m/day will produce satisfactory removal for a depth of 3.1 m. It is decided to have two circular settling tanks in parallel. The required diameter (expressed in m) of the settling tanks is __________
Ans: 6.8 : 7.0

8. The hardness of a ground water sample was found to be 420 mg/L as CaCO3. A softener containing ion exchange resins was installed to reduce the total hardness to 75 mg/L as CaCO3 before supplying to 4 households. Each household gets treated water at a rate of 540 L/day. If the efficiency of the softener is 100%, the bypass flow rate (expressed in L/day) is _________
Ans: 380 : 390

9. The sound pressure (expressed in µPa) of the faintest sound that a normal healthy individual can hear is
(A) 0.2 (B) 2 (C) 20 (D) 55
Ans: C

10. In the context of the IRC 58-2011 guidelines for rigid pavement design, consider the following pair of statements.
I: Radius of relative stiffness is directly related to modulus of elasticity of concrete and inversely related to Poisson's ratio
II: Radius of relative stiffness is directly related to thickness of slab and modulus of subgrade reaction.
Which one of the following combinations is correct?
(A) I: True; II: True (B) I: False; II: False
(C) I: True; II: False (D) I: False; II: True
Ans: B

CIVIL ENGINEERING

CIVIL ENGINEERING MCQs