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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 the downcomer of a distillation column, the minimum recommended residence time is about _______________ seconds?
A 2.5
B 5
C 12.5
D 17.5
Correct Answer: 5
Flanges are connected to pipes by _______________________?
A Screwing
B Welding
C Brazing
D All A., B. and C.
Correct Answer: All A., B. and C.
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower ?
A Plate tower is preferred, if interstage cooling is required to remove heats of reaction or
B Plate tower is preferred over packed tower, if the operation involves liquids containing
C The total weight of a dry plate tower is usually much more than that of a dry packed tower
D In operations involving large temperature changes. (e.g. distillation), plate towers are
Correct Answer: The total weight of a dry plate tower is usually much more than that of a dry packed tower
Cylindrical pressure vessels in horizontal condition is generally supported on a ________________ support?
A Lug
B Skirt
C Saddle
D Guy wire
Correct Answer: Saddle
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
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