MCQs

Chemical Engineering MCQs with Explanations

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2631Chemical EngineeringMedium

Low thermal conductivity of heat insulating materials is due to its________?

AHigh proportion of air space

BHigh specific heat

CNone of these

DDense structure

Correct answer

A. High proportion of air space

Explanation

The correct answer is High proportion of air space.

2632Chemical EngineeringMedium

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

ATerminal concentrations of gas stream

BComposition of the entering liquid

CNone of these

DFlow rate of the entering gas

Correct answer

C. None of these

Explanation

The correct answer is None of these.

2633Chemical EngineeringMedium

For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a________?

ABatch reactor is preferred over a single CSTR for high yield

BSingle CSTR is the most suitable

CTubular reactor is preferred over a single CSTR for high yield

DBoth A. and B.

Correct answer

D. Both A. and B.

Explanation

The correct answer is Both A. and B..

2634Chemical EngineeringMedium

________ forces do not act in case of fluid flow?

AElastic

BCentrifugal

CTensile

DVibratory

Correct answer

C. Tensile

Explanation

The correct answer is Tensile.

2635Chemical EngineeringMedium

Boiling point elevation of a solution of NaOH ________?

AIncreases rapidly with temperature rise

BIs almost independent of temperature

CBoth B. and C

DIs almost independent of pressure

Correct answer

C. Both B. and C

Explanation

The correct answer is Both B. and C.

2636Chemical EngineeringMedium

A floating/submerged body is always stable, if its centre of gravity________?

ALies below its centre of buoyancy

BLies above its metacentre

CAnd centre of buoyancy coincide

DLies above its centre of buoyancy

Correct answer

A. Lies below its centre of buoyancy

Explanation

The correct answer is Lies below its centre of buoyancy.

2637Chemical EngineeringMedium

Wrought iron is a suitable material of construction for handling ________ solutions?

AConcentrated acidic

BNone of these

CAlkalis & alkaline

DDilute acidic

Correct answer

C. Alkalis & alkaline

Explanation

The correct answer is Alkalis & alkaline.

2638Chemical EngineeringMedium

Percentage of U-238 in natural uranium is around________?

A0.71

B29.71

C0.015

D99.29

Correct answer

D. 99.29

Explanation

The correct answer is 99.29.

2639Chemical EngineeringMedium

Low viscosity absorbent is preferred for reasons of ________?

AAll A., B. and C.

BRapid absorption rates and good heat transfer characteristics

CImproved flooding characteristics

DLow pressure drop on pumping

Correct answer

A. All A., B. and C.

Explanation

The correct answer is All A., B. and C..

2640Chemical EngineeringMedium

Typical specifications for design stipulates the gain margin and phase margin to be respectively________?

A< 1.7 and 1.7 and < 30°

B> 1.7 and > 30°

C30°

Correct answer

B. > 1.7 and > 30°

Explanation

The correct answer is > 1.7 and > 30°.

2631Chemical EngineeringMedium

Low thermal conductivity of heat insulating materials is due to its________?

AHigh proportion of air space

BHigh specific heat

CNone of these

DDense structure

Correct answer

A. High proportion of air space

Explanation

The correct answer is High proportion of air space.

2632Chemical EngineeringMedium

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

ATerminal concentrations of gas stream

BComposition of the entering liquid

CNone of these

DFlow rate of the entering gas

Correct answer

C. None of these

Explanation

The correct answer is None of these.

2633Chemical EngineeringMedium

For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a________?

ABatch reactor is preferred over a single CSTR for high yield

BSingle CSTR is the most suitable

CTubular reactor is preferred over a single CSTR for high yield

DBoth A. and B.

Correct answer

D. Both A. and B.

Explanation

The correct answer is Both A. and B..

2634Chemical EngineeringMedium

________ forces do not act in case of fluid flow?

AElastic

BCentrifugal

CTensile

DVibratory

Correct answer

C. Tensile

Explanation

The correct answer is Tensile.

2635Chemical EngineeringMedium

Boiling point elevation of a solution of NaOH ________?

AIncreases rapidly with temperature rise

BIs almost independent of temperature

CBoth B. and C

DIs almost independent of pressure

Correct answer

C. Both B. and C

Explanation

The correct answer is Both B. and C.

2636Chemical EngineeringMedium

A floating/submerged body is always stable, if its centre of gravity________?

ALies below its centre of buoyancy

BLies above its metacentre

CAnd centre of buoyancy coincide

DLies above its centre of buoyancy

Correct answer

A. Lies below its centre of buoyancy

Explanation

The correct answer is Lies below its centre of buoyancy.

2637Chemical EngineeringMedium

Wrought iron is a suitable material of construction for handling ________ solutions?

AConcentrated acidic

BNone of these

CAlkalis & alkaline

DDilute acidic

Correct answer

C. Alkalis & alkaline

Explanation

The correct answer is Alkalis & alkaline.

2638Chemical EngineeringMedium

Percentage of U-238 in natural uranium is around________?

A0.71

B29.71

C0.015

D99.29

Correct answer

D. 99.29

Explanation

The correct answer is 99.29.

2639Chemical EngineeringMedium

Low viscosity absorbent is preferred for reasons of ________?

AAll A., B. and C.

BRapid absorption rates and good heat transfer characteristics

CImproved flooding characteristics

DLow pressure drop on pumping

Correct answer

A. All A., B. and C.

Explanation

The correct answer is All A., B. and C..

2640Chemical EngineeringMedium

Typical specifications for design stipulates the gain margin and phase margin to be respectively________?

A< 1.7 and 1.7 and < 30°

B> 1.7 and > 30°

C30°

Correct answer

B. > 1.7 and > 30°

Explanation

The correct answer is > 1.7 and > 30°.