If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains_______________?

Related Mcqs:

For drainage pipes in buildings the test applied before putting them to use, is__________________?

A. Water test B. Smoke test C. Straightness test D. All the above...

15 cumecs, the depth d and width are related by For drains up to___________________?

A. d = 0.2 B B. d = 0.5 B C. B = 0.2 d D. B = 0.5 d...

The value of Chezy’s constant C = 157.6/(1.81 + K/ ) is used in__________________?

A. Chezy’s formula B. Bazin’s formula C. Kutter’s formula D. Manning’s formula...

Assertion A. : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable. Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other water qualities_________________?

A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not a correct explanation of A C. A is true but R is false D. A is false but R is true...

The sewage treatment in septic tanks is due to__________________?

A. Anaerobic decomposition B. Aerobic decomposition C. Parasitic decomposition D. None of these...