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