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Waste Water Engineering

For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________?

Civil Engineering Mcqs, Waste Water Engineering /
For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________?

A. 16 m
B. 20 m
C. 24 m
D. 30 m

For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

If q is the average sewage flow from a city of population P, the maximum sewage flow______________?

Civil Engineering Mcqs, Waste Water Engineering /
If q is the average sewage flow from a city of population P, the maximum sewage flow______________?

A. Q = [(4 + )/(18 + )] q
B. Q = [(18 + P)/(4 + )] q
C. Q = [(18 + )/(4 + )] q
D. Q = [(5 + )/((15 + )] q

If q is the average sewage flow from a city of population P, the maximum sewage flow______________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?

Civil Engineering Mcqs, Waste Water Engineering /
If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?

A. Hydrogen sulphide
B. Carbon dioxide
C. Methane
D. Oxygen

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

The sewage treatment units in which anaerobic decomposition of organic matter is used, are called________________?

Civil Engineering Mcqs, Waste Water Engineering /
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called________________?

A. Imhoff tanks
B. Trickling filters
C. Sludge sedimentation tanks
D. None of these

The sewage treatment units in which anaerobic decomposition of organic matter is used, are called________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is________________?

Civil Engineering Mcqs, Waste Water Engineering /
If the diameter of a sewer is 150 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

If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

Dilution method of disposing of sewage, is not preferred to_______________?

Civil Engineering Mcqs, Waste Water Engineering /
Dilution method of disposing of sewage, is not preferred to_______________?

A. When sewage is fresh
B. When diluting water has high dissolved oxygen content
C. When diluting water is used for water supply near the point of sewage disposed
D. When the diluting water is having flow currents

Dilution method of disposing of sewage, is not preferred to_______________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is_________________?

Civil Engineering Mcqs, Waste Water Engineering /
The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is_________________?

A. 1 in 100 upward
B. 1 in 500 upward
C. 1 in 100 downward
D. 1 in 503 upward

The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is_________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering