High noise levels produced during operation of fans and compressors can be reduced by using__________________?

Related Mcqs:

CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?

A. 102 B. 105 C. 109 D. 1015...

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...

Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ?

A. NOx B. Hg C. SO2 D. F...

A man exposed to excessive noise level in the working environment may suffer from____________________?

A. Hearing loss B. Rupture of ear drum C. Nervousness & fatigue D. All A., B. & C....

Pick out the wrong statement?

A. Catalytic converter is fitted in automobiles to reduce carbon monoxide concentration in exhaust emissions B. Inhalation of pollutant carbon monoxide results in death by asphyxiation C. Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles D. Decomposition of plants containing chlorophyll is a natural source of carbon monoxide in … Pick out the wrong statement?Read More...