A. 65 to 70%
B. 70 to 75%
C. 75 to 80%
D. 85%
✅ The correct answer is option C.
Civil Engineering Mcqs MCQs
5 days-biochemical oxygen demand (BOD5) is taken at a temperature of_________________?
A. 0°C
B. 15°C
C. 20°C
D. 25°C
✅ The correct answer is option C.
The normal values of over flow rates for sedimentation tanks using coagulant, ranges between__________________?
A. 25,000 to 35,000 litres/sqm/day
B. 40,000 to 50,000 litres/sqm/day
C. 50,000 to 60,000 litres/sqm/day
D. 80,000 to 100,000 litres/sqm/day
✅ The correct answer is option C.
To maintain aerobic biological activity, the moisture content of the compost mass should be about_________________?
A. 45 %
B. 50 %
C. 55 %
D. 60 %
✅ The correct answer is option C.
For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is____________________?
A. Cast iron sewers
B. Cement concrete sewers
C. Glazed bricks sewers
D. Stone ware sewers
✅ The correct answer is option C.
Rotameter is a device used to measure____________________?
A. absolute pressure
B. velocity of fluid
C. flow
D. rotation
✅ The correct answer is option C.
Bernoulli equation deals with the law of conservation of____________________?
A. mass
B. momentum
C. energy
D. work
✅ The correct answer is option C.
If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is_______________?
A. D’ = 0.64 D
B. D’ = 0.74 D
C. D’ = 0.84 D
D. D’ = 0.94 D
✅ The correct answer is option C.
The flow in which conditions do not change with time at any point, is known as _____________________?
A. one dimensional flow
B. uniform flow
C. steady flow
D. turbulent flow
✅ The correct answer is option C.
Falling drops of water become spheres due to the property of ________________?
A. adhesion
B. cohesion
C. surface tension
D. viscosity
✅ The correct answer is option C.