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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

Which of the following efficiencies can be greater than 100% ?
A Overall plate efficiency
B Murphree plate efficiency
C Point efficiency
D None of these
Correct Answer: Murphree plate efficiency
Minimum tube pitch recommended for shell and tube heat exchangers is about _______________ times the outside diameter of the tube?
A 1.25
B 1.75
C 2.5
D 3.5
Correct Answer: 1.25
In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement ?
A Results in higher shell side pressure drop
B Can accomodate less number of tubes for a given shell diameter
C Facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell
D Creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer
Correct Answer: Results in higher shell side pressure drop
_____________ heat exchanger is also known as ‘hair pin type’ exchanger?
A Double pipe
B Finned
C Plate type
D Regenerative
Correct Answer: Double pipe
The average velocity in the tubes of a 1-4 heat exchanger is ______________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate ?
A 2
B 1/2
C 4
D 1/4
Correct Answer: 4
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is________________?
A Bending
B Deformation
C Shear
D Elongation
Correct Answer: Bending
(Le/D) for couplings and unions would be_______________?
A 60
B 200
C 350
D Negligible
Correct Answer: Negligible
Ratio of tube length to shell diameter for a shell and tube heat exchanger is________________?
A 8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers
B 4 : 1 to 8 : 1 for liquid-liquid exchanger
C < 4 : 1 for gas-gas exchangers
D Both B. & C.
Correct Answer: Both B. & C.
Liquid gradient over a tray can be minimised by________________?
A Providing a higher skirt clearance or a higher weir
B Decreasing the number of rows of caps through which the liquid flows or by decreasing the
C Using split flow, radial flow or cascade flow for column diameter large than 4 ft
D All A., B. and C.
Correct Answer: All A., B. and C.
Slope of counter-current flow rotary drier is in the range of ____________ meter/metre?
A 0 to 0.08
B 0 to 0.8
C 0 to 1.5
D 0 to 2.2
Correct Answer: 0 to 0.08
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