A rain sanitary sewer is constructed to carry_________________ ?
A. Sanitary sewage
B. Storm sewage
C. Surface water
D. Ground water
Waste Water Engineering
For house drainage minimum gradient is__________________?
For house drainage minimum gradient is__________________?
A. 1 in 60
B. 1 in 80
C. 1 in 10
D. 1 in 400
A rainfall may be classified as acidic if its pH value is less or equal to________________?
A rainfall may be classified as acidic if its pH value is less or equal to________________?
A. 6
B. 7
C. 5
D. 6.5
If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is___________________?
If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is___________________?
A. D
B. 1.25 D
C. 1.5 D
D. 1.75 D
The recommended detention period for grit chambers is_______________?
The recommended detention period for grit chambers is_______________?
A. 1 minute
B. 2 minutes
C. 3 minutes
D. 5 minutes
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__________________?
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
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