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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

_______________ shaped roof is most commonly used for cylindrical tanks ?
A Cone
B Dome
C Umbrella
D Flat
Correct Answer: Cone
(Le/D) for fully open gate valves would be __________________?
A Much more than that for fully open globe valves
B Much less (say 2% than that for fully open globe valves)
C Around 7
D Both B. and C.
Correct Answer: Both B. and C.
Smoker’s equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the_________________?
A Relative volatility is close to one (e.g., separation of close boiling isomers)
B Feed is not at its bubble point
C Number of equilibrium stages in only stripping section is to be calculated
D Number of equilibrium stages required is likely to be very small
Correct Answer: Relative volatility is close to one (e.g., separation of close boiling isomers)
In actual operation of a bubble cap distillation tower, the ______________ at the bottom of the tower is more than that at the top of the tower?
A Molal flow rate of vapour
B Vapour molecular weight
C Pressure and temperature
D All A., B. and C.
Correct Answer: All A., B. and C.
In a ______________ riveted joint, the rivets in the various rows are opposite to each other?
A Zig-zag
B Chain
C Diamond
D None of these
Correct Answer: Chain
Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 – 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ?
A η = 17 – 61.1 log μ
B η = 24.6 (Δp/μ)
C η = 1.66 – 0.25 log μ
D η = 0.25 log μ – 1.67
Correct Answer: η = 17 – 61.1 log μ
It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than _________________?
A 0.99
B 0.95
C 0.80
D 0.55
Correct Answer: 0.80
The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about _________________ mm of water column per metre height of packing?
A 1-5
B 20-40
C 100-150
D 1000-1500
Correct Answer: 20-40
Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as_________________?
A Δp = G
B Δp = G0.5
C Δp = G2
D Δp = 1/G0.6
Correct Answer: Δp = G
Fresh water carrying pipelines in chemical industries are coloured with _______________ color?
A Sea green
B Brown
C Yellow
D Red
Correct Answer: Sea green
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