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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 packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed _______________________ of the column diameter?
A 1/10-1/15th
B 1/5-1/10th
C 1/20-1/30th
D 1/2 to 1/4th
Correct Answer: 1/10-1/15th
In the design of a shell and tube heat exchanger, the corrosion allowance ____________________?
A Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc.
B For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe
C For internal cover and tube sheet is provided on both the sides
D All A., B. & C.
Correct Answer: All A., B. & C.
____________________ strain is measured using a ‘strain rosetter’ ?
A Volumetric
B Shear
C Linear
D None of these
Correct Answer: Linear
The minimum plate spacing in most of the petroleum refinery distillation columns (of dia > 3 ft) is normally _____________ inches?
A 6
B 12
C 18
D 36
Correct Answer: 18
_______________ 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
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