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Civil Engineering Mcqs

To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of_______________?

To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of_______________?

A. Hydrochloric acid
B. Sulphuric acid
C. Nitric acid
D. Citric acid

To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of_______________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains__________________?

If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains__________________?

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

If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains__________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

If is the diameter of upper circular portion, the area of cross-section of a standard egg shaped sewer, is____________________?

If is the diameter of upper circular portion, the area of cross-section of a standard egg shaped sewer, is____________________?

A. D²
B. D²
C. D²
D. D²

If is the diameter of upper circular portion, the area of cross-section of a standard egg shaped sewer, is____________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering