Aerosols present in atmospheric air may be__________________?

Related Mcqs:

Noise level in a quiet private business office is about _____________ decibels?

A. 25 B. 50 C. 70 D. 85...

In large thermal power stations very fine particulates present in flue gas are removed by___________________?

A. Wet scrubber B. Bag filter C. Electrostatic precipitators D. Dust catcher...

Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about ______________ decibels?

A. 75 B. 95 C. 120 D. 140...

Maximum permissible residual chlorine in treated water should be ____________ mg/litre?

A. 0.001 to 0.01 B. 0.2 to 0.3 C. 2 to 3 D. 5 to 10...

Which of the following dust collection equipments is the least efficient (for sub-micronic particles) ?

A. Dust catcher (gravity type) B. Cyclone separator C. Bag filter D. Hollow wet scrubber...