Presence of high concentration of ozone and smog in atmospheric air causes the
Select an option to see the answer and solution.
Chemical Engineering · all questionsEnvironmental Engineering
Environmental Engineering
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
307
Questions
2/16
Page
Pick an option on a question to see the right answer and solution.
Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause
Select an option to see the answer and solution.
Turbidity of water is an indication of the presence of
Select an option to see the answer and solution.
Pick out the wrong statement.
Select an option to see the answer and solution.
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.
Select an option to see the answer and solution.
Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
Select an option to see the answer and solution.
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.
Select an option to see the answer and solution.
Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.
Select an option to see the answer and solution.
Noise level inside a jet air liner in normal flight is about __________ decibels.
Select an option to see the answer and solution.
Noise level in a quiet private business office is about __________ decibels.
Select an option to see the answer and solution.
Noise level during normal conversation among men is about __________ decibles.
Select an option to see the answer and solution.
TLV of aldrin in public water supply system is about __________ μg/litre.
Select an option to see the answer and solution.
A standard test for determination of hardness in water is termed as __________ test.
Select an option to see the answer and solution.
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.
Select an option to see the answer and solution.
Which of the following is the most lethal water pollutant?
Select an option to see the answer and solution.
Operating principle of cyclone separator is based on the action of __________ dust particles.
Select an option to see the answer and solution.
Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.
Select an option to see the answer and solution.
Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.
Select an option to see the answer and solution.
COD of raw municipal sewage may be in the range of about __________ mg/litre.
Select an option to see the answer and solution.
BOD of raw municipal sewage may be in the range of about __________ mg/litre.
Select an option to see the answer and solution.