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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

Presence of iron and manganese in water causes___________________?
A Reduction in its dissolved oxygen content
B Discoloration of bathroom fixtures
C Temporary hardness
D None of these
Correct Answer: Discoloration of bathroom fixtures
TLV of ammonia, nitrogen dioxide and phenol vapor in air is ______________ ppm ?
A 5
B 100
C 1000
D 2000
Correct Answer: 5
Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?
A Sedimentation tank
B Circular clarifier
C Mechanical flocculation
D Chemical coagulation
Correct Answer: Chemical coagulation
The most commonly used chemical coagulant in water treatment is________________?
A Ferrous sulphate
B Alum
C Lime
D Hydrazine
Correct Answer: Alum
Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres?
A 100
B 1000
C 400
D 4000
Correct Answer: 100
Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes_________________?
A Poor visibility due to sky darkening
B Irritation in eyes
C Respiratory trouble
D All A., B. and C.
Correct Answer: All A., B. and C.
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?
A Forestation
B Rain
C Green house effect
D Vegetation
Correct Answer: Green house effect
Water filtration rate in a rapid sand filter ranges from ______________ kilolitres/m2/hr?
A 0.1 to 1
B 3 to 6
C 10 to 15
D 15 to 20
Correct Answer: 3 to 6
Which of the following sources is responsible for maximum air pollution ?
A Industrial chimney exhaust
B Forest fire
C Automobiles exhaust
D Photochemical oxidation of organic matter
Correct Answer: Automobiles exhaust
The biological decomposition of organic substances in wastes controlled conditions is called_________________?
A Incineration
B Biological oxidation
C Composting
D None of these
Correct Answer: Composting
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