For sewer mains of 0.5 to 1 m diameter, the ratio of maximum daily sewage flow to the average daily sewage flow is assumed__________________?
A. 1.5
B. 2.0
C. 2.5
D. 3.0
Civil Engineering Mcqs
In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is_______________?
In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is_______________?
A. D
B. D /2
C. D/3
D. D/4
The design period of sewage treatment works in normally_________________?
The design period of sewage treatment works in normally_________________?
A. 5 – 10 years
B. 15 – 20 years
C. 30 – 40 years
D. 40 – 50 years
The effluent of a septic tank is_________________?
The effluent of a septic tank is_________________?
A. Fit for discharge into any open drain
B. Foul and contains dissolved and suspended solids
C. As good as that from a complete treatment
D. None of these
The detention time (t) of a settling tank, may be defined as the time required for_________________?
The detention time (t) of a settling tank, may be defined as the time required for_________________?
A. A particle to travel along its length
B. A particle to travel from top surface to bottom sludge zone
C. The flow of sewage to fill the tank
D. None of these
The liquid wastes from kitchens, bath rooms and wash basins, is not called________________?
The liquid wastes from kitchens, bath rooms and wash basins, is not called________________?
A. Liquid waste
B. Sullage
C. Sewage
D. None of these
Large diameter sewers subjected to external pressure alone, are reinforced ______________________?
Large diameter sewers subjected to external pressure alone, are reinforced ______________________?
A. Near the inner surface of the pipe
B. Near the outer surface of the pipe
C. Both A. and B.
D. With elliptical cage
The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is____________________?
The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is____________________?
A. 1.5
B. 2.0
C. 3.0
D. 4.0
For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is____________________?
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 width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is __________________?
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is __________________?
A. 5 m
B. 5.5 m
C. 6.5 m
D. 7 m