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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 rough value of diffusion co-efficient of water vapor into air at 25°C may be about ______________ cm2/sec?
A 0.25
B 2.5
C 1.25
D 0.0025
Correct Answer: 0.25
In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads? Reflux conditions: (i) Reflux stream is completely liquid and is at its bubble point. (ii) Reflux stream is below its bubble point ?
A Condenser and reboiler loads are the same in both the cases
B Reboiler load is the same in both the cases but condenser load is higher in case (ii)
C Condenser load is the same in both the cases but reboiler load is higher in case (ii)
D Both condenser and reboiler loads are higher in case (ii) as compared to case (i)
Correct Answer: Both condenser and reboiler loads are higher in case (ii) as compared to case (i)
_______________ column is used in gas absorption process ?
A Wetted wall
B Sieve/perforated tray
C Bubble cap
D Packed
Correct Answer: Packed
The diffusion co-efficient in m2/s. of acetic acid in benzene (liquid in liquid) is___________________?
A 2.09 × 10-4
B 2.09 × 10-5
C 2.09 × 10-9
D 2.09 × 10-12
Correct Answer: 2.09 × 10-4
The ‘shanks system’ of leaching (i.e., counter-current multiple contact leaching) is used for____________________?
A Recovery of tannis from the tree barks and woods
B Leaching sodium nitrate from Chilean nitrate bearing rock
C Both A. and B.
D Neither A. nor B.
Correct Answer: Both A. and B.
Which of the following employs an accessory known as ‘drift eliminator’ ?
A Multiple effect evaporator
B Mechanical draft cooling tower
C Rotary dryer
D Rotating disc contactor
Correct Answer: Mechanical draft cooling tower
The term “approach” in a cooling tower refers to the difference in the temperature of the____________________?
A Cold water leaving the tower and the wet bulb temperature of the surrounding air
B Hot water entering the tower and the wet bulb temperature of the surrounding air
C Hot water entering and the cooled water leaving the cooling tower
D None of these
Correct Answer: Cold water leaving the tower and the wet bulb temperature of the surrounding air
Below is given an equilibrium moisture curve of a substance. State which regions represent free moisture and unbound moisture respectively ?
A II, III
B II, IV
C IV, III
D IV, II
Correct Answer: II, III
Humid volume, at a given temperature is a/an _______________ function of humidity?
A Inverse
B Exponential
C Linear
D Logarithmic
Correct Answer: Linear
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is _______________ the liquid head available in the downcomer?
A Less than
B More than
C Same as
D Very much less
Correct Answer: More than
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