Chemical Environmental Engineering Quiz 3
1 / 50
Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about _______ decibels?
2 / 50
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by _______?
3 / 50
Pick out the wrong statement?
4 / 50
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__________?
5 / 50
Pick out the correct statement ?
6 / 50
Main pollutants released from iron & steel industry is___________?
7 / 50
Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is ________ micro gram (? g)/litre?
8 / 50
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes_________?
9 / 50
Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of _______ toxic gas?
10 / 50
Noise emitted by a ventilation fan at a distance of 3 metres is about ______ decibels?
11 / 50
Operating principle of cyclone separator is based on the action of ________ dust particles?
12 / 50
Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by__________?
13 / 50
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about ________ decibels?
14 / 50
On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because ___________?
15 / 50
Pick out the correct statement?
16 / 50
Pick out the wrong statement ?
17 / 50
18 / 50
Polyvinyl chloride containers are not suitable for storing__________?
19 / 50
Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about _______ decibels?
20 / 50
Presence of _____ in water stream are deleterious to aquatic life?
21 / 50
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about ______ decibels?
22 / 50
Noise level during normal conversation among men is about _______ decibels?
23 / 50
Peroxyacetyl nitrate (PAN), a pollutant is found in the__________?
24 / 50
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the________?
25 / 50
Main pollutants released from petroleum refineries is___________?
26 / 50
Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is ______ decibels?
27 / 50
Maximum allowable concentration of CO2 in air for safe working is ______ ppm (parts per million)?
28 / 50
Out of the following, TLV of ________ is maximum (about 500 ppm)?
29 / 50
Noise level in a quiet private business office is about ______ decibels?
30 / 50
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________?
31 / 50
32 / 50
Pollution by particulate matter emission in the atmosphere does not take place during metal______?
33 / 50
Presence of ______ bacteria in water causes disease like typhoid?
34 / 50
35 / 50
36 / 50
Most of the atmospheric air pollutants are present in large quantity in___________?
37 / 50
Maximum permissible residual chlorine in treated water should be _____ mg/litre?
38 / 50
Maximum permissible turbidity in potable water is ______ ppm?
39 / 50
Particles having diameter greater than 75 ?m (micrometer = 10-6 mm) are called___________?
40 / 50
Noise level inside a jet airliner in normal flight is about _______ decibels?
41 / 50
Persons working in cement plants and limestone quarries are more prone to disease like___________?
42 / 50
Nitrogen oxides (NOx) is not produced in the _______ industry?
43 / 50
Particulates (< 1?m size) remaining suspended in air indefinitely and transported by wind currents are called__________?
44 / 50
45 / 50
Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about _____ decibels?
46 / 50
Photochemical smog is formed from automobile exhaust _________?
47 / 50
Pick out the one which is not a chemical coagulant ?
48 / 50
Ozone is___________?
49 / 50
Noise pollution level in a chemical plant is expressed in ___________?
50 / 50
Permissible safe limit (TLV) of ______ toxic gas is 100-1000 parts per million (ppm)?
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