Chemical Environmental Engineering MCQs

141 MCQs  — Chemical Engineering MCQs  (Page 6 of 15)

Attempt Chemical Environmental Engineering Quiz
The pH value of potable water should be between____________________?
A. 1 to 1.5
B. 6.5 to 8
C. 13 to 14
D. 4 to 5
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Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm) ?
A. Benzopyrene
B. Peroxyacetyl nitrate
C. Carbon monoxide
D. Sulphur dioxide
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Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?
A. Respiratory & lung disease
B. Reduction in plant’s productivity owing to acid rain
C. Corrosion of building materials
D. All a., b. and c.
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Corrosion in boilers can be prevented by _________________?
A. Deaeration of feed water
B. Enhancing ph of feed water by adding alkali
C. Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen
And prevents corrosion
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Fine grit present in sewage is removed in the _____________ during sewage treatment?
A. Grit chamber
B. Detritus tank
C. Trickling filter
D. Skimming tank
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Out of the following, TLV of _______________ is maximum (about 500 ppm)?
A. Carbon dioxide
B. Toluene
C. Carbon disulphide
D. Acetaldehyde
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Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?
A. 0.002
B. 0.2
C. 1.2
D. 4.8
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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)?
A. 10
B. 90
C. 800
D. 750
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Presence of _____________ bacteria in water causes disease like typhoid?
A. Aerobic
B. Pathogenic
C. Anaerobic
D. Non-pathogenic
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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
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Word of the Day
22 Jul
Combative
ready or eager to fight or argue.
لڑاکا، متنازع، جھگڑالو

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