Question 1

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_________________?

Accepted Answer

Manning

Question 2

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______________________?

Accepted Answer

300 mg/l

Question 3

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?

Accepted Answer

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

Question 4

Dry water flow in a combined sewer, is______________________?

Accepted Answer

Storm water

Question 5

In sewage having fully oxidised organic matter, the nitrogen exists in the form of________________?

Accepted Answer

Nitrates

MCQs Knowledge

🏗️Civil Engineering MCQs

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_________________?

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______________________?

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?

Dry water flow in a combined sewer, is______________________?

In sewage having fully oxidised organic matter, the nitrogen exists in the form of________________?

Clogging of sewers, is caused due to_______________?

The settlement of a particle in sedimentation tank, is affected by_____________________?

A sewer pipe contains 1 mm sand particles of specific gravity 2.65 and 5 mm organic particles of specific gravity 1.2, the minimum velocity required for removing the sewerage, is_____________________?

The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known_____________________?

The most dangerous pollutant in vehicular emissions is____________________?

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