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Waste Water Engineering

Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter______________________?

Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter______________________?

A. Less than 0.01 mm
B. Less than 0.05 mm
C. Less than 0.1 mm
D. Greater than 0.1 mm

Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter______________________? Read More »

Civil Engineering Mcqs, Waste Water Engineering

A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________?

A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________?

A. Carbondioxide gas
B. Hydrogen sulphide gas
C. Methane gas
D. Petrol vapours

A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________? Read More »

Civil Engineering Mcqs, Waste Water Engineering