EXAMIANS
Which of the following is not a natural source of air pollution?
YOUR ANSWER : ?
YOUR ANSWER : ?
Which is a secondary air pollutant?
YOUR ANSWER : ?
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
YOUR ANSWER : ?
As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m³.(μg-microgram)
YOUR ANSWER : ?
Thermal pollution due to excessive heat & temperature in the working place causes
YOUR ANSWER : ?
Pick out the one which is not a chemical coagulant.
YOUR ANSWER : ?
The permissible color for domestic water supply is __________ ppm.
YOUR ANSWER : ?
Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by
YOUR ANSWER : ?
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 ozones.
YOUR ANSWER : ?
The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels.
YOUR ANSWER : ?