MCQs

Chemical Engineering MCQs with Explanations

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3391Chemical EngineeringMedium

Limestone is normally crushed in a ________?

ABall mill

BHammer crusher

CTube mill

DRoll crusher

Correct answer

B. Hammer crusher

Explanation

The correct answer is Hammer crusher.

3392Chemical EngineeringMedium

Which of the following metals cannot be hot worked at room temperature?

ALead

BZinc

CTin

DNickel

Correct answer

D. Nickel

Explanation

The correct answer is Nickel.

3393Chemical EngineeringMedium

Out of the following, the joint produced by ________ has the lowest strength?

AWelding

BSoldering

CBrazing

DRiveting

Correct answer

B. Soldering

Explanation

The correct answer is Soldering.

3394Chemical EngineeringMedium

As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages________?

ARemain unchanged

BIncrease

CDecrease

DCan either increase or decrease, depends on the system

Correct answer

C. Decrease

Explanation

The correct answer is Decrease.

3395Chemical EngineeringMedium

Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the________?

ALow pressure drop

BHigh heat transfer co-efficient

CFlexibility possible in the baffle arrangement

DLess corrosion problems

Correct answer

C. Flexibility possible in the baffle arrangement

Explanation

The correct answer is Flexibility possible in the baffle arrangement.

3396Chemical EngineeringMedium

For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is ________?

AMore

BEqual

CLess

DMore or less, depending on the type of particle

Correct answer

A. More

Explanation

The correct answer is More.

3397Chemical EngineeringMedium

Coke oven walls are lined with ________ bricks?

AFire clay

BLow thermal conductivity

CSilica

DTar-dolomite

Correct answer

C. Silica

Explanation

The correct answer is Silica.

3398Chemical EngineeringMedium

Magnesite refractories have low resistance to________?

ADisintegration on sudden change of temperature

BBoth B. and C.

CAttack by basic slag

DAbrasion

Correct answer

B. Both B. and C.

Explanation

The correct answer is Both B. and C..

3399Chemical EngineeringMedium

All gases during throttling process at atmospheric temperature and pressure show a cooling effect except________?

AN2

BCO2

CO2

DH2

Correct answer

D. H2

Explanation

The correct answer is H2.

3400Chemical EngineeringMedium

dW and dq are not the exact differential, because q and W are________?

APath functions

BIntensive properties

CState functions

DExtensive properties

Correct answer

A. Path functions

Explanation

The correct answer is Path functions.

3391Chemical EngineeringMedium

Limestone is normally crushed in a ________?

ABall mill

BHammer crusher

CTube mill

DRoll crusher

Correct answer

B. Hammer crusher

Explanation

The correct answer is Hammer crusher.

3392Chemical EngineeringMedium

Which of the following metals cannot be hot worked at room temperature?

ALead

BZinc

CTin

DNickel

Correct answer

D. Nickel

Explanation

The correct answer is Nickel.

3393Chemical EngineeringMedium

Out of the following, the joint produced by ________ has the lowest strength?

AWelding

BSoldering

CBrazing

DRiveting

Correct answer

B. Soldering

Explanation

The correct answer is Soldering.

3394Chemical EngineeringMedium

As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages________?

ARemain unchanged

BIncrease

CDecrease

DCan either increase or decrease, depends on the system

Correct answer

C. Decrease

Explanation

The correct answer is Decrease.

3395Chemical EngineeringMedium

Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the________?

ALow pressure drop

BHigh heat transfer co-efficient

CFlexibility possible in the baffle arrangement

DLess corrosion problems

Correct answer

C. Flexibility possible in the baffle arrangement

Explanation

The correct answer is Flexibility possible in the baffle arrangement.

3396Chemical EngineeringMedium

For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is ________?

AMore

BEqual

CLess

DMore or less, depending on the type of particle

Correct answer

A. More

Explanation

The correct answer is More.

3397Chemical EngineeringMedium

Coke oven walls are lined with ________ bricks?

AFire clay

BLow thermal conductivity

CSilica

DTar-dolomite

Correct answer

C. Silica

Explanation

The correct answer is Silica.

3398Chemical EngineeringMedium

Magnesite refractories have low resistance to________?

ADisintegration on sudden change of temperature

BBoth B. and C.

CAttack by basic slag

DAbrasion

Correct answer

B. Both B. and C.

Explanation

The correct answer is Both B. and C..

3399Chemical EngineeringMedium

All gases during throttling process at atmospheric temperature and pressure show a cooling effect except________?

AN2

BCO2

CO2

DH2

Correct answer

D. H2

Explanation

The correct answer is H2.

3400Chemical EngineeringMedium

dW and dq are not the exact differential, because q and W are________?

APath functions

BIntensive properties

CState functions

DExtensive properties

Correct answer

A. Path functions

Explanation

The correct answer is Path functions.