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Civil Engineering Mcqs

The most effective arrangement for diverting excess storm water into a natural drainage, is____________________?

Civil Engineering Mcqs, Waste Water Engineering /
The most effective arrangement for diverting excess storm water into a natural drainage, is____________________?

A. Leag weir
B. Overflow weir
C. Siphon spill way
D. None of these

The most effective arrangement for diverting excess storm water into a natural drainage, is____________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is________________?

Civil Engineering Mcqs, Waste Water Engineering /
For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is________________?

A. 10 cm
B. 12 cm
C. 15 cm
D. 18 cm

For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at___________________?

Civil Engineering Mcqs, Waste Water Engineering /
You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at___________________?

A. Full depth
B. Half full
C. Two third full
D. Three fourth full

You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at___________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is____________________?

Civil Engineering Mcqs, Waste Water Engineering /
In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is____________________?

A. [(100 + P1)/(100 – P2)] V1
B. [(100 – P1)/(100 + P2)] V1
C. [(100 – P1)/(100 – P2)] V1
D. [(100 + P2)/(100 – P1)] V1

In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is____________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by_________________?

Civil Engineering Mcqs, Waste Water Engineering /
If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by_________________?

A. Chezy
B. Manning
C. Bazin
D. Kutter

If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by_________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is______________________?

Civil Engineering Mcqs, Waste Water Engineering /
3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is______________________?

A. 100 mg/l
B. 200 mg/l
C. 300 mg/l
D. 400 mg/l

3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is______________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

Assertion A.: The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R): If certain deposition takes place and is not removed, it obstructs free flow and causes further deposition leading to complete blocking of the sewer?

Civil Engineering Mcqs, Waste Water Engineering /
Assertion A.: The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R): If certain deposition takes place and is not removed, it obstructs free flow and causes further deposition leading to complete blocking of the sewer?

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are 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

Assertion A.: The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R): If certain deposition takes place and is not removed, it obstructs free flow and causes further deposition leading to complete blocking of the sewer? Read More »

Civil Engineering Mcqs, Waste Water Engineering