661. Units of surface tension are_________________?

By Admin / September 7, 2025

A. energy/unit area

B. distance

C. both of the above

D. it has no units

✅ The correct answer is option C.

659. 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______________________?

663. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?

1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².

Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin

2. Transformer cores are normally made from

Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin

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