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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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.

Pick out the wrong statement. Generally for physical adsorption, a gas of________________?

A Higher molecular weight is adsorbed in preference to a gas of low molecular weight

B High critical temperature is adsorbed in preference to a gas of low critical temperature

C Low volatility is adsorbed in preference to a gas of high volatility

D None of these

Review Detailed Answer

Correct Answer: None of these

Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C ?

A Humidification only

B Heating only

C Both heating and humidification

D Evaporative cooling

Review Detailed Answer

Correct Answer: Both heating and humidification

Which of the following is not fixed by the process requirements, in the design of absorbers ?

A Flow rate of the entering gas

B Composition of the entering liquid

C Terminal concentrations of gas stream

D None of these

Review Detailed Answer

Correct Answer: None of these

Reboiler is considered as one theoretical plate, because_____________________?

A Of the assumption that vapour and liquid leaving the reboiler are in equilibrium

B Vapour is recycled to the column

C Reboiler itself contains one plate

D None of these

Review Detailed Answer

Correct Answer: Of the assumption that vapour and liquid leaving the reboiler are in equilibrium

With increase in the mass velocity of the gas, the rate of drying during the constant rate period ______________, if the conduction and radiation through the solid are negligible ?

A Increases

B Decreases

C Remain same

D Increases linearly

Review Detailed Answer

Correct Answer: Increases

Large scale drying of wheat is done in a ________________ dryer?

A Fluidised bed

B Spouted bed

C Tray

D Vacuum rotary

Review Detailed Answer

Correct Answer: Spouted bed

With increase in temperature, the leaching rate increases due to__________________?

A Decreased liquid viscosity

B Increased diffusivity

C Both A. and B.

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Both A. and B.

In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed____________________?

A q > 1

B q < 1

C q = 1

D q = 0

Review Detailed Answer

Correct Answer: q = 1

Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysteresis. In such cases, the desorption equilibrium pressure is ______________ that obtained for adsorption?

A Lower than

B Higher than

C Same as

D Either same or higher than

Review Detailed Answer

Correct Answer: Lower than

In an absorption column, the flooding velocity for random packing is ___________________ that for stacked/regular packing?

A Greater than

B Smaller than

C Equal to

D Either A., or B.; depends on the type of packing

Review Detailed Answer

Correct Answer: Smaller than

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Pick out the wrong statement. Generally for physical adsorption, a gas of________________?

Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C ?

Which of the following is not fixed by the process requirements, in the design of absorbers ?

Reboiler is considered as one theoretical plate, because_____________________?

With increase in the mass velocity of the gas, the rate of drying during the constant rate period ______________, if the conduction and radiation through the solid are negligible ?

Large scale drying of wheat is done in a ________________ dryer?

With increase in temperature, the leaching rate increases due to__________________?

In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed____________________?

In an absorption column, the flooding velocity for random packing is ___________________ that for stacked/regular packing?