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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

What is the value of ‘q’ for saturated vapor feed to a distillation column? (where q = fraction of the feed stream that is liquid ?
A 0
B 1
C 1
D
Correct Answer: 0
25 per cent cut segmental baffle means that the baffle__________________?
A Height is 75% of the I.D. of the shell
B Height is 25% of the I.D. of the shell
C Spacing is 75% of its height
D Width is 25% of its height
Correct Answer: Height is 75% of the I.D. of the shell
Pick out the wrong statement?
A In practical operation, distillation towers having diameter 3-6 metres equipped with bubble cap (round) size of 15 cms are used
B Height of packing in a packed tower is about 3 times the column diameter for raschig rings and about 5 to 10 times the column diameter for saddle packing
C In a sieve tray, the minimum hole diameter is equal to the tray thickness
D In a stainless steel sieve tray, the minimum hole diameter is equal to 10 times the plate thickness
Correct Answer: In a stainless steel sieve tray, the minimum hole diameter is equal to 10 times the plate thickness
Pick out the wrong statement ?
A Plate efficiency increases with increase in superficial vapour velocity till entrainment limit
B Increase in depth of the liquid about the slots increases the plate efficiency, particularly if the liquid depth is < 1"
C Too small a plate spacing can cause a low efficiency, if the vapour velocity is greater than the allowable value
D None of these
Correct Answer: None of these
Pick out the wrong statement?
A Riveting provides a permanent fastening method
B The joint made by overlapping of one plate over the other, and then riveting the two plates together with two rows of rivets is called ‘double riveted butt joint’
C Shank diameter of the rivets should be less than the size of the hole drilled in the plate for riveting
D The efficiency of a riveted joint is the ratio of the strength of the riveted joint to the strength of the solid plate
Correct Answer: The joint made by overlapping of one plate over the other, and then riveting the two plates together with two rows of rivets is called ‘double riveted butt joint’
Pick out the wrong statement?
A The tensile strength of a brittle material is less than its compressive strength
B The compressive strength of a ductile material is less than its tensile strength
C In a thick cylindrical shell, the hoop stress is maximum at the inner radius
D The value of crushing load is more than that of buckling load for long columns
Correct Answer: The value of crushing load is more than that of buckling load for long columns
Pick out the correct statement?
A It is preferred to use a vertical condenser for condensation of vapor from a distillation column without sub-cooling
B Draining of residual liquid on tray during shut down of distillation column is facilitated by weep holes
C Random packing a packed tower offers the advantage of lower pressure drop and higher throughput of fluids as compared to regular/stacked packing
D Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding
Correct Answer: Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding
Pick out the wrong statement pertaining to the design of a basket type evaporator ?
A It is used for high viscosity liquor having large rate of scaling
B The tube bundle is suspended on bracket
C There is no central downtake
D Downtake is formed by the annular space between the bundle and the shell
Correct Answer: It is used for high viscosity liquor having large rate of scaling
Pick out the wrong statement pertaining to a shell and tube heat exchanger ?
A The minimum value of baffle spacing is 50 mm
B The maximum value of baffle spacing is equal to the I.D. of the shell
C The maximum unsupported tube span is generally about 75 times tube diameter, but is reduced to about 60 times for aluminium, copper & alloys of these
D Disk and doughnut baffle is the most commonly used baffle
Correct Answer: Disk and doughnut baffle is the most commonly used baffle
Pick out the wrong statement. In an agitated vertical cylindrical reaction vessel, the___________________?
A Ratio of liquid depth to tank diameter (i.e. the filling ratio) recommended for most purposes is 1
B Filling ratio for dispersing gas in a liquid is 2 for sufficiently long contact period
C Flat bottom and conical bottom vessels have low agitation efficiency for agitation of heavy solids in liquids
D Dished bottom vessel has very high power consumption
Correct Answer: Dished bottom vessel has very high power consumption
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