During purification process of sewage the gas given off, is________________?
A. Carbon dioxide
B. Hydrogen
C. Ammonia
D. All the above
Civil Engineering Mcqs
The sewerage system originates from__________________?
The sewerage system originates from__________________?
A. House sewers
B. Lateral sewers
C. Branch sewers
D. Main sewers
In septic tanks, decomposition of organic bacteria, is done by_____________________?
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
Sewer pipes need be checked for_________________?
Sewer pipes need be checked for_________________?
A. Minimum flow
B. Maximum flow
C. Both A. and B.
D. None of these
hydraulically equivalent, the relationship which holds good, is _______________?
hydraulically equivalent, the relationship which holds good, is _______________?
A. D8/3 = 4 b8/3
B. D3/8 = 4 b3/8
C. D2/3 = 4 b2/3
D. D3/2 = 4 b3/2
Sewer manholes are generally provided at________________?
Sewer manholes are generally provided at________________?
A. The change of gradient
B. The change of direction
C. The junctions of sewers
D. All of these
Aerobic activity is maximum_______________?
Aerobic activity is maximum_______________?
A. In freshly produced sewage
B. At sewer pipes
C. In sewer treatment plants
D. None of these
Before discharging the foul sewage into rivers, it is generally treated by_____________________?
Before discharging the foul sewage into rivers, it is generally treated by_____________________?
A. Screening
B. Sedimentation
C. Oxidation
D. All the above
In 1000 kg of sewage, the total solids approximate___________________?
In 1000 kg of sewage, the total solids approximate___________________?
A. 0.5 to 1.0 kg
B. 1 kg to 2.0 kg
C. 5 kg to 7.5 kg
D. 7.5 kg to 10 kg
If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is__________________?
If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is__________________?
A. 1 in 60
B. 1 in 100
C. 1 in 120
D. None of these