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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

In case of design of a shell and tube heat exchanger___________________?
A Minimum cleaning lane of 6.5 mm is provided, when tubes are on a square pitch
B Minimum tube sheet thickness (in which tubes are fixed) is equal to the O.D. of the tube upto
C O.D. of the tube is 6 to 40 mm while the tube lengths used are 0.5, 2.5, 3.0, 4.0, 5.0, 6 metres
D All A., B. & C.
Correct Answer: All A., B. & C.
With increase in gas flow rate to fabric surface area ratio (Nm3/hr/m2 fabric surface area), the size & the cost of a bag filter___________________?
A Increases
B Decreases
C Remain unaffected
D None of these
Correct Answer: Decreases
The equivalent diameter for pressure drop is _______________ that for heat transfer?
A Smaller than
B Greater than
C Equal to
D Not related with
Correct Answer: Not related with
________________ liquor is best handled in a long tube vertical evaporator ?
A Foamy
B Scaling
C Viscous
D Salting
Correct Answer: Foamy
In which of the following evaporators, steam is fed inside the tube while the liquor is outside the tube ?
A Long tube vertical evaporator
B Short tube vertical evaporator
C Horizontal tube evaporator
D None of these
Correct Answer: Horizontal tube evaporator
Pressure drop due to pipe fittings can be estimated by the equation, ΔP/ρ = 4f, (Le/D) (V2/2gc) where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (Le/D) (dimensionless) for 45° elbow and 180° close return bends would be respectively around______________________?
A 5 and 10
B 45 and 75
C 180 and 300
D 300 and 500
Correct Answer: 45 and 75
In a distillation column, the minimum residence time for liquid in the downspout is about ______________ seconds?
A 1
B 8
C 80
D 180
Correct Answer: 8
A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the__________________?
A Central dished section and corner torus section
B Corner torus section and central dished section
C Central dished section and straight flange section
D Straight flange section and corner torus section
Correct Answer: Central dished section and corner torus section
______________ of water makes it a widely used coolant in heat exchangers?
A Low corrosiveness
B Low dirt factor
C High specific heat
D Low viscosity
Correct Answer: High specific heat
Hold up of material in a operating rotary drier is in the range of___________________?
A 0.05 to 0.15
B 0.25 to 0.50
C 0.5 to 0.8
D 0.8 to 0.9
Correct Answer: 0.05 to 0.15
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