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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 slope of the feed line, if the feed to a distillation column is a saturated liquid ?
A 0
B ∞
C > 1
D < 1
Correct Answer: ∞
High pressure fluid in a shell and tube heat exchanger should preferably be routed through the________________?
A Tubes to avoid the expansion of high pressure shell construction
B Shell side for smaller total pressure drop
C Shell side, if the flow is counter-current and tube side if the flow is co-current
D Shell side for large overall heat transfer co-efficient
Correct Answer: Tubes to avoid the expansion of high pressure shell construction
______________ closure is the weakest enclosure for cylindrical vessels?
A Hemispherical
B Torispherical
C Conical or flat plate
D Elliptical
Correct Answer: Conical or flat plate
In a distillation column, bubble caps are located on trays with a pitch of ______________ times the outside diameter of the caps?
A 1.3 to 2
B 1.6 to 2
C 2.5
D 1.5 to 3
Correct Answer: 1.3 to 2
Pick out the wrong statement pertaining to the design of a horizontal tube evaporator ?
A It is unsuitable for concentrating those liquids, which form a scale or deposit salt
B It is suitable for process, in which the final product is a liquor instead of solid
C Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator
D Liquor flows inside the tube, while the steam is outside submerging the tube
Correct Answer: Liquor flows inside the tube, while the steam is outside submerging the tube
Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about ______________ percent of the total thickness?
A 1 to 5
B 10 to 20
C 30 to 40
D 40 to 50
Correct Answer: 10 to 20
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
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