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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

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
Correct Answer: 0.2
Out of the following, TLV of _______________ is maximum (about 500 ppm)?
A Carbon dioxide
B Toluene
C Carbon disulphide
D Acetaldehyde
Correct Answer: Carbon dioxide
Fine grit present in sewage is removed in the _____________ during sewage treatment?
A Grit chamber
B Detritus tank
C Trickling filter
D Skimming tank
Correct Answer: Detritus tank
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
D All A., B. and C.
Correct Answer: All A., B. and C.
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.
Correct Answer: All A., B. and C.
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
Correct Answer: Carbon monoxide
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
Correct Answer: 6.5 to 8
Which of the following plants does not emit appreciable amount of SO2 in atmosphere ?
A Thermal power plant
B Petroleum refinery
C Nitric acid plant
D Sulphuric acid plant
Correct Answer: Nitric acid plant
Biological oxidation ponds remove organic matters present in the polluted water by _______________?
A Using the activities of bacteria and other micro organisms
B Aerobic oxidation
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?
A Low amount of excess combustion air
B Large quantity of excess combustion air
C Hydrocarbon fuel
D Pulverised coal as fuel
Correct Answer: Low amount of excess combustion air
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