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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 Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the
B A sharp decrease in pressure drop is an indication of flooding in a distillation coloumn
C Solvent used in extractive distillation should be of high volatility
D Flash distillation is suitable for separating components which have very close boiling
Correct Answer: Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the
Pick out the correct statement ?
A Dialysis process is used for the production of fresh water from brine
B Electrodialysis is used in the manufacture of NaOH
C Electrodialysis is used for the refining/purification of petrol
D Both B. and C.
Correct Answer: Electrodialysis is used in the manufacture of NaOH
Pick out the correct statement?
A The slope of the stripping line is always less than unity
B For a given separation in a binary distillation column, with increase in reflux ratio (above the
C In Ponchon-Savarit method of no. of theoretical plate determination, the stripping and
D Kremser-Brown-Souder’s equation is used to calculate the efficiency of a plate tower
Correct Answer: In Ponchon-Savarit method of no. of theoretical plate determination, the stripping and
Pick out the wrong statement pertaining to the rotary dryer ?
A Flights (located in the inside shell of rotary dryer) lift the material being dried and shower it
B Hold up of a rotary drier is defined as the fraction of the dryer volume occupied by the solid at
C Rotary dryer is suitable for drying sticky material
D Recommended peripheral speed of a rotary drier is in the range of 10 to 30 metres/minute
Correct Answer: Rotary dryer is suitable for drying sticky material
Pick out the wrong statement ?
A With decrease in feed temperature, the number of plates required for binary distillation
B The extraction per unit of total height for a short packed column is more effective than for a
C Natural draft cooling towers are made of ferroconcrete and its cross-section is wider at the
D Vander wall adsorption is also called chemisorption
Correct Answer: Vander wall adsorption is also called chemisorption
Pick out the correct statement ?
A For identical gas flow rates, less pressure drop occurs through a plate tower than through a
B Plate column can handle greater liquid loads without flooding than packed column, but the
C For the same duty, plate columns weigh less than packed columns
D All A., B. and C.
Correct Answer: All A., B. and C.
Pick out the wrong statement pertaining to leaching ?
A Fine solids cannot be leached in a Pachuca tank
B Door classifier can be used for leaching of coarse solids
C Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor
D Very high temperature is not needed for the leaching of sugar beet
Correct Answer: Fine solids cannot be leached in a Pachuca tank
Pick out the correct statement?
A Bound moisture is removed during constant rate drying period
B Free moisture is removed during falling rate drying period
C The sum of free moisture and equilibrium moisture in a solid is called the critical moisture
D The driving force for mass transfer in a wet solid is its free moisture content
Correct Answer: The driving force for mass transfer in a wet solid is its free moisture content
Pick out the wrong statement?
A Packed towers are preferred for vacuum operation, because the pressure drop through the
B Packed towers are preferred over plate towers for handling corrosive and foamy liquids
C Diameter of randomly packed tower is normally more than 1.2 metres
D Due to uneven supply and improper distribution of liquid, problem of channelling, loading &
Correct Answer: Diameter of randomly packed tower is normally more than 1.2 metres
Pick out the wrong statement ?
A Different solids have different equilibrium moisture curves
B Total condenser or reboiler is considered equivalent to one theoretical plate in McCabe-Thiele
C Heat removal load on cooler remains constant, even with increase of the reflux ratio in a
D Even a forced draft cooling tower cannot cool water below the wet bulb temperature
Correct Answer: Heat removal load on cooler remains constant, even with increase of the reflux ratio in a
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