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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

Pick out the correct statement ?
A Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present
B COD is determined by oxidising the organic matter present in water with potassium
C COD is related to BOD of a given waste in water but the relationship varies for different
D All A., B. and C.
Correct Answer: All A., B. and C.
When the concentration of SO2 in air is greater than ______________ ppm, it gives a pungent smell?
A 0.01
B 0.1
C 1
D 4
Correct Answer: 4
Which is the most practical and economical method for removal of suspended solid matter from polluted water ?
A Sedimentation
B Skimming off
C Chlorination
D Biological oxidation
Correct Answer: Sedimentation
Iron & manganese present as pollutant in water cannot be removed by__________________?
A Ion exchange process
B Oxidation followed by settling & filtration
C Lime soda process or manganese zeolite process
D Chlorination
Correct Answer: Chlorination
In the context of the chemical process industries, the term BOD is normally associated with the_____________________?
A Characterisation of solid wastes
B Organic concentration in gaseous effluents
C Characterisation of liquid effluents
D Characterisation of boiler feed water
Correct Answer: Characterisation of liquid effluents
Pick out the wrong statement pertaining to ‘green house’ for the plants ?
A ‘Green house’ (made of glass) allows visible sunlight (i.e., short wavelength solar radiation
B The emitted longer wavelength radiation (e.g., infrared) is partly reflected and partly absorbed
C ‘Green house effect’ in earth’s atmosphere is due to increasing CO2 level in atmosphere, where
D ‘Green house’ is colder than the outside atmosphere
Correct Answer: ‘Green house’ is colder than the outside atmosphere
Most efficient and suitable dust removal equipment for removal of fly-ash from flue gas in a thermal power plant is the__________________?
A Gravity settling chamber
B Cyclone separator
C Electrostatic precipitator
D Bag filter
Correct Answer: Electrostatic precipitator
White smoke coming out of the chimney of a furnace indicates the use of_________________?
A Low excess air
B Very high excess air
C Gaseous fuel in the furnace
D Liquid fuel in the furnace
Correct Answer: Very high excess air
Carbonaceous particles having size less than 1 μm are called___________________?
A Grit
B Aggregates
C Aerosols
D Smoke
Correct Answer: Smoke
Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of ______________ toxic gas?
A Moderately
B Highly
C Extremely
D Very extremely
Correct Answer: Very extremely
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