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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

A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator__________________?
A Is economical in operation
B Employs high velocity, high heat transfer rate and less heating surface requirement
C Employs a centrifugal pump placed between external downtake from vapor drum and inlet to
D Both B. & C.
Correct Answer: Both B. & C.
An adequate clearance between the tray and the shell wall of a distillation column is provided to_____________________?
A Drain the liquid from the tray when the unit is not in operation
B Allow for thermal expansion and facilitate installation
C Avoid back-trapping
D None of these
Correct Answer: Allow for thermal expansion and facilitate installation
Safety valves are provided in chemical equipments to guard against excessive_________________?
A Temperature
B Pressure/pressure fluctuation
C Turbulence
D Noise
Correct Answer: Pressure/pressure fluctuation
Theoretically calculated diameter of the stripping section of the continuous rectification column is ______________ that of the enriching section?
A Less than
B More than
C Same as
D Either more or less (depending upon relative volatility
Correct Answer: More than
Floating head heat exchangers are used for the____________________?
A Heat transfer between corrosive fluids
B Cases where temperature difference between the shell and the tubes is more (>50°C)
C Co-current heat transfer systems
D Counter-current heat transfer systems
Correct Answer: Cases where temperature difference between the shell and the tubes is more (>50°C)
Welded joint efficiency in the design of chemical process equipment is taken as_________________?
A 0.55
B 0.75
C 0.85
D 0.95
Correct Answer: 0.85
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area) ?
A Aa = Sa
B 1.2 Aa = 1.2 Sa
C Sa = 1.5 Aa
D Aa = 1.5 Sa
Correct Answer: Aa = Sa
Needle valves are generally not used for___________________?
A Very large diameter pipes
B High pressure throttling service
C Very accurate flow control
D Smaller sizes of pipe
Correct Answer: Very large diameter pipes
Larger depth of liquid on the trays of a distillation column_________________?
A Leads to high tray efficiency
B Results in higher pressure drop per tray
C Both A. & B.
D Neither A. or B.
Correct Answer: Both A. & B.
In a cylindrical vessel subjected to internal pressure, the longitudinal stress ζL and the circumferential stress, ζn are related by___________________?
A ζh = 2 ζL
B ζh = ζL
C ζh = ζL/2
D No relation exists
Correct Answer: ζh = 2 ζL
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