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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.

In a forward feed multiple effect, the pressure build up will be____________________?

A Least at the inlet of the first effect

B Least at the outlet of the last effect

C Highest at the inlet of the last effect

D Highest at the outlet of the last effect

Review Detailed Answer

Correct Answer: Least at the outlet of the last effect

Which of the following has the minimum absorptivity ?

A Aluminium foil

B Coal dust

C Refractory bricks

D Iron plates

Review Detailed Answer

Correct Answer: Aluminium foil

Convective heat transfer, in which heat is transferred by movement of warmed matter is described by___________________?

A Fourier’s law

B Newton’s law of cooling

C Fick’s law

D None of these

Review Detailed Answer

Correct Answer: Newton’s law of cooling

If h1 = inner film co-efficient and /h2 = outer film co-efficient, then the overall heat transfer co-efficient is________________?

A Always less than h1

B Always between h1 and h2

C Always higher than h2

D Dependent on metal resistance

Review Detailed Answer

Correct Answer: Always between h1 and h2

In an extended surface heat exchanger, fluid having lower co-efficient________________?

A Flows through the tube

B Flows outside the tubes

C Can flow either inside or outside the tubes

D Should not be used as it gives very high pressure drop

Review Detailed Answer

Correct Answer: Flows outside the tubes

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.

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

In a forward feed multiple effect, the pressure build up will be____________________?

Which of the following has the minimum absorptivity ?

Convective heat transfer, in which heat is transferred by movement of warmed matter is described by___________________?

If h1 = inner film co-efficient and /h2 = outer film co-efficient, then the overall heat transfer co-efficient is________________?

In an extended surface heat exchanger, fluid having lower co-efficient________________?

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?