Chemical Engineering MCQs

6108 MCQs  (Page 531 of 611)

Attempt Chemical Engineering Quiz
Presence of bacteria in potable (drinking) water causes_________________?
A. Turbidity
B. Disease
C. Bad odour
D. Bad taste & colour
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Noise level heard at a distance of about 100 metres from a jet engine with after burner is about _____________ decibels?
A. 120
B. 140
C. 170
D. 200
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Scale formation in boiler is controlled by____________________?
A. Preheating of feed water
B. Reduction in hardness, silica & alumina in feed water
C. Keeping the ph value of feed water just below 7
D. Eliminating h2s in feed water
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Main pollutant present in automobile exhaust is_________________?
A. Co
B. Co2
C. No
D. Hydrocarbons
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Pollution by particulate matter emission in the atmosphere does not take place during metal____________________?
A. Grinding
B. Machining
C. Cutting
D. Polishing
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Arsenic pollutant is not generated in _______________ industries?
A. Tanneries
B. Glass & ceramic
C. Beverages
D. Any of these
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The pH value of oxidised sewage is about_____________________?
A. 1.8
B. 6.2
C. 7.3
D. 13.4
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Growth of ______________ is promoted by the presence of manganese in water?
A. Files
B. Algae
C. Micro-organisms
D. Mosquitoes
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Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?
A. 84
B. 88
C. 80
D. 92
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Radioactive solid nuclear wastes are disposed off by _________________?
A. High temperature incineration
B. Pathological incineration
C. Pyrolysis
D. Underground burial in concrete containers
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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