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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.

The critical radius ‘r’ of insulation on a pipe is given by____________________?

A r = 2k/h

B r = k/h

C r = k/2h

D r = h/k

Review Detailed Answer

Correct Answer: r = k/h

In an interphase heat transfer process, the equilibrium state corresponds to equality of temperature in the two phases, while the condition for equilibrium in an interphase mass transfer process is equality of___________________?

A Concentrations

B Chemical potentials

C Activity co-efficients

D Mass transfer co-efficients

Review Detailed Answer

Correct Answer: Concentrations

A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m2.°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be__________________?

A Greater than that for un-insulated steam pipe

B Less than that of the un-insulated steam pipe

C Equal to that of the un-insulated steam pipe

D Less than the steam pipe with 5 cms insulation

Review Detailed Answer

Correct Answer: Less than that of the un-insulated steam pipe

Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

A Economiser

B Regenerator

C Ceramic recuperator

D None of these

Review Detailed Answer

Correct Answer: None of these

In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?

A Velocity of circulation

B Liquor-film co-efficient

C Both A. and B.

D Neither A. and B.

Review Detailed Answer

Correct Answer: Neither A. and B.

The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature) ?

A (ΔT)2

B (ΔT)4

C (ΔT)3

D √(ΔT)

Review Detailed Answer

Correct Answer: (ΔT)3

In a multiple effect evaporator, the effect of boiling point elevation is to______________________?

A Reduce the capacity

B Reduce the economy

C Increase the economy

D None of these

Review Detailed Answer

Correct Answer: Reduce the capacity

Film condensation is promoted on a/an _______________________ surface?

A Oily

B Coated

C Clean & smooth

D Dirty

Review Detailed Answer

Correct Answer: Clean & smooth

In a boiling curve, the peak heat flux is called the _____________ point?

A Nusselt

B Leidenfrost

C Boiling

D Burnout

Review Detailed Answer

Correct Answer: Leidenfrost

In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?

A Nucleate

B Pool

C Low pressure

D None of these

Review Detailed Answer

Correct Answer: Pool

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The critical radius ‘r’ of insulation on a pipe is given by____________________?

In an interphase heat transfer process, the equilibrium state corresponds to equality of temperature in the two phases, while the condition for equilibrium in an interphase mass transfer process is equality of___________________?

Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?

The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature) ?

In a multiple effect evaporator, the effect of boiling point elevation is to______________________?

Film condensation is promoted on a/an _______________________ surface?

In a boiling curve, the peak heat flux is called the _____________ point?

In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?