A. Centrifugal pump
B. Pneumatic ejector
C. Reciprocating pump
D. None of these
Related Mcqs:
- The non-clog pump which permits solid matter to pass out with the liquid sewage, is________________?
A. Centrifugal pump
B. Reciprocating pump
C. Pneumatic ejector
D. None of these - Clogging of sewers, is caused due to_______________?
A. Silting
B. Low discharge
C. Greasy and oily matters
D. All the above - In sewage, the solids in mg per litre is__________________?
A. 100 to 500
B. 500 to 1000
C. 1000 to 1500
D. 1500 to 2000 - 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 a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is_________________?
A. 100 mg/l
B. 200 mg/l
C. 300 mg/l
D. 400 mg/l - The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?
A. 0.05552 cumec
B. 0.05554 cumec
C. 0.05556 cumec
D. 0.0556 cumec - If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is_____________________?
A. 50 ppm
B. 100 ppm
C. 150 ppm
D. 200 ppm - A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is____________________?
A. 100
B. 1000
C. 5000
D. 10000 - 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 - If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is_________________?
A. 50 mg/l
B. 100 mg/l
C. 150 mg/l
D. 250 mg/l
