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.

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
Which of the following is an undesirable characteristic for the solvent used in gas absorption ?
A Low vapor pressure
B Low viscosity
C High gas solubility
D None of these
Correct Answer: None of these