A. 10 kg
B. 100 kg
C. 1000 kg
D. 1 kg
✅ The correct answer is option A.
Civil Engineering Mcqs MCQs
In septic tanks, decomposition of organic bacteria, is done by_____________________?
A. Anaerobic bacteria
B. Aerobic bacteria
C. Both types of bacterias
D. None of these
✅ The correct answer is option A.
In sewers the highest non-scouring velocity is achieved in________________?
A. Glazed bricks sewers
B. Cast iron sewers
C. Cement concrete sewers
D. Stone ware sewers
✅ The correct answer is option A.
Hydrometer is used to determine________________?
A. specific gravity of liquids
B. specific gravity of solids
C. specific gravity of gases
D. relative humidity
✅ The correct answer is option A.
The most dangerous pollutant in vehicular emissions is____________________?
A. CO
B. SO2
C. CO2
D. O3
✅ The correct answer is option A.
The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is________________?
A. d² (0.011d + 0.785H)/Q
B. d (0.022d + 0.085H)/Q
C. d (0.785d + 0.011H)/Q
D. d (0.285d + 0.011H)/Q
✅ The correct answer is option A.
The sewer pipe which carries sewage from a building for immediate disposal is______________?
A. House sewer
B. Lateral sewer
C. Intercepting sewer
D. Main sewer
✅ The correct answer is option A.
Assertion A.: A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R): It helps to accommodate the scum in the septic tank_________________?
A. Both A and R is true and R is the correct explanation of A
B. Both A and R is true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true
✅ The correct answer is option A.
The presence of free ammonia in sewage, is detected by___________________?
A. Boiling
B. Adding potassium permanganate
C. Adding sulphuric acid
D. Phenol-di-sulphuric acid
✅ The correct answer is option A.
The flow which neglects changes in a transverse direction is known as ____________________?
A. one dimensional flow
B. uniform flow
C. steady flow
D. turbulent flow
✅ The correct answer is option A.