M C Q s D r i v e

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.

A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process ?
A Flow rate of inlet air
B Relative humidity of outlet air
C Humidity of inlet air
D Temperature of the solid
Correct Answer: Temperature of the solid
With increase in the concentration of the adsorbate, the integral heat of adsorption____________________?
A Increases
B Decreases
C Remains unchanged
D May increase or decrease; depends on the type of adsorbate
Correct Answer: Decreases
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a____________________?
A Higher dew point
B Higher absolute (specific) humidity
C Higher relative humidity
D Higher wet bulb temperature
Correct Answer: Higher relative humidity
An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is ?
A 9.21
B 4.605
C 100
D 0.001
Correct Answer: 4.605
_______________ columns are used for liquid dispersion in a continuous gas phase ?
A Packed
B Pulse
C Bubble cap
D Sieve plate
Correct Answer: Packed
The efficiency of a plate column will be maximum, when the flow is ideal __________________ the plate?
A Across
B Above
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their____________________?
A Viscosity
B Density
C Solubility
D Relative volatility
Correct Answer: Solubility
Priming in a distillation column_________________?
A Results from very low gas velocity
B Is desirable from point efficiency consideration
C Is characterised by the presence of foam throughout the space between trays
D Reduces the overall pressure drop
Correct Answer: Is characterised by the presence of foam throughout the space between trays
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by __________________?
A Raising the temperature
B Lowering the total pressure
C Both A. and B.
D Neither A. nor B.
Correct Answer: Both A. and B.
The dew point of a saturated gas phase equals the ________________ temperature?
A Gas
B Room
C Wet bulb
D None of these
Correct Answer: Gas