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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

Commercial packed scrubbers are normally designed for a pressure drop range of ______________ mm water column per metre of packed height?
A 4-8
B 17-34
C 52-68
D 88-105
Correct Answer: 17-34
For turbine agitator, the impeller diameter is about_________________?
A 0.3 to 0.5 d
B 0.1 to 0.2 d
C 0.65 to 0.85 d
D 0.95 d
Correct Answer: 0.3 to 0.5 d
The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the_________________?
A Equal sized reactors are the best
B Smaller reactor should come first
C Larger reactor should come first
D None of these
Correct Answer: Smaller reactor should come first
Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is _____________ the longitudinal stress?
A Half
B Equal to
C Twice
D Eight times
Correct Answer: Twice
The thickness of heat transfer plates used in the plate type heat exchanger ranges from _____________ mm, pressed in a single piece provided with grooves & corrugations?
A 0.3 to 0.8
B 1.25 to 3.125
C 3.5 to 7.0
D 8 to12
Correct Answer: 1.25 to 3.125
The ratio of down take area to cross-sectional area of the tube, for calandria type evaporator ranges from_________________?
A 0.5 to 1
B 1 to 1.5
C 1.5 to 2
D 2 to 2.5
Correct Answer: 0.5 to 1
A cylindrical pressure vessel of volume 6 πm3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to________________?
A 5 mm
B 6 mm
C 8 mm
D 10 mm
Correct Answer: 10 mm
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of_________________?
A 2
B 20.8
C 20.2
D None of these
Correct Answer: 2
Thin spherical shells subjected to internal pressure, develop ______________ stresses?
A Radial
B Circumferential
C Both A. & B.
D Neither A. nor B.
Correct Answer: Radial
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about ______________ mm?
A 10
B 50
C 100
D 200
Correct Answer: 10
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