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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

Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger________________?
A Permits the use of less tubes in a given shell diameter
B Facilitates comparatively easier external cleaning because of large clearance
C Permits the use of more tubes in a given shell diameter
D Both B. and C.
Correct Answer: Permits the use of more tubes in a given shell diameter
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of_________________?
A (1.2)3/2
B (1.2)3/5
C (1.2)2/3
D (1.2)5/3
Correct Answer: (1.2)5/3
Friction factor for turbulent flow in a new pipe is given by____________________?
A f = 16/NRe
B f = 0.04/(NRe)0.16
C f = 0.22 NRe
D f = 25/NRe
Correct Answer: f = 0.04/(NRe)0.16
Equivalent diameter for heat transfer calculation for a duct of square cross-section having each side as ‘d’ will be__________________?
A d
B √d
C √(2πd)
D √(2d)
Correct Answer: d
The shell side pressure drop in a shell and tube heat exchanger is maximum for _______________ baffle?
A Disk and ring
B Segmental
C Orifice
D Independent of the type of
Correct Answer: Orifice
Width and depth of grooves in the tube sheet holes normally are _______________ inch respectively?
A 1/8 and 1/64
B 1/64 and 1/8
C 1/2 and 8
D 1/2 and 5
Correct Answer: 1/8 and 1/64
Maximum size of the raschig rings used in a packed tower is about _______________ of the column diameter?
A 1/10th
B 1/20th
C 1/30th
D 1/50th
Correct Answer: 1/30th
In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference ______________________?
A Is always less than arithmetic average value
B Is always more than arithmetic mean value and the geometric mean value
C Is always less than arithmetic mean value, but more than geometric mean value
D May be either more or less than geometric mean and arithmetic mean value depending upon
Correct Answer: Is always less than arithmetic average value
A pipe is generally made of circular cross-section, because a circular cross-section has the____________________?
A Higher structural strength
B Lowest surface area requirement for a given volume
C Both A. & B.
D None of these
Correct Answer: Both A. & B.
For a given design of bubble cap, the number of bubble caps to be used per tray is set by the _________________?
A Allowable gas velocity through the slots
B Plate spacing
C Diameter of the column
D All A., B. and C.
Correct Answer: Allowable gas velocity through the slots
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