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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

The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line) ?
A S1/S2
B S1.S2
C S2/S1
D 1/S1.S2
Correct Answer: S1/S2
Which of the following packing materials provides for maximum mass transfer ?
A Raschig rings
B Raschig rings
C Cross-partition rings
D All give the same value
Correct Answer: Cross-partition rings
Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower ?
A Size, shape, orientation and surface of the packing particles
B Density and viscosity of fluids
C Fluid flow rates
D All A., B. and C.
Correct Answer: All A., B. and C.
The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about ______________ times the design pressure?
A 1.5 to 2
B 3 to 4
C 4 to 5
D > 5
Correct Answer: 1.5 to 2
____________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?
A Hemispherical
B Dished
C Ellipsoidal
D Conical
Correct Answer: Ellipsoidal
The slope of the feed line in distillation operation is given by (where, q = fraction of the feed stream that is liquid ?
A -q
B -q/(1-q)
C -q/(q-1)
D None of these
Correct Answer: -q
The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from__________________?
A 2 to 3
B 3 to 5
C 4 to 8
D 6 to 12
Correct Answer: 4 to 8
Liquid gradient over the tray results due to the___________________?
A Resistance offered to flow of liquids by caps & risers and the flow of gas
B Low gas velocity
C Large plate spacing
D Large reflux ratio
Correct Answer: Resistance offered to flow of liquids by caps & risers and the flow of gas
Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the_______________?
A Flow rates of each fluid
B Type and size of packing
C Concentration of each fluid
D All A, B. & C.
Correct Answer: All A, B. & C.
Heat transfer co-efficient, hG(Kcal/hr.m2 .°C) and mass velocity of air, G (kg/hr.m2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to ____________________?
A hG = 1.004G0.37
B 1.004G0.8
C hG = 0.0176G0.37
D 0.0176G1.37
Correct Answer: hG = 1.004G0.37
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