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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

Moisture contained by a substance in excess of the equilibrium moisture is called the _______________ moisture?
A Unbound
B Free
C Critical
D Bound
Correct Answer: Free
In case of ______________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated?
A Molecular
B Azeotropic
C Extractive
D Flash
Correct Answer: Extractive
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is________________?
A 0.31
B 0.107
C 0.017
D 0.215
Correct Answer: 0.215
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be _______________ percent?
A 100
B > 100
C < 100
D None of these
Correct Answer: 100
McCabe-Thiele method________________?
A Uses molal units for material and energy balance
B Uses weight fractions to express liquid and vapour composition
C Can use any type of units
D Is more accurate than Ponchon-Savarit method
Correct Answer: Uses molal units for material and energy balance
The relation, Sc = Pr = 1, is valid, when the mechanism of ______________ transfer is same?
A Heat and mass
B Mass and momentum
C Heat and momentum
D Heat, momentum and mass
Correct Answer: Heat and mass
Dew point of an air-water vapor mixture_________________?
A Decreases with decrease in pressure
B At constant humidity & total pressure is fixed
C Corresponding to any point on the humidity chart is obtained by projecting a line through this
D All A , B. & C.
Correct Answer: All A , B. & C.
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around_________________?
A 1
B 0.24
C 3.97
D 600
Correct Answer: 1
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled_________________?
A And humidified
B And dehumidified with increase in wet bulb temperature
C At the same relative humidity
D And dehumidified with decrease in wet bulb temperature
Correct Answer: And dehumidified with decrease in wet bulb temperature
The equilibrium liquid composition compared to the vapor composition in case of________________?
A More
B Less
C Same
D Either more or less; depends on the system
Correct Answer: Same
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