MCQs

Chemical Engineering MCQs with Explanations

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881Chemical EngineeringMedium

Use of higher percentage of lime for bonding silica bricks, reduces their________?

ABoth A. & B.

BAbrasion resistance

CNeither A. nor B.

DStrength

Correct answer

A. Both A. & B.

Explanation

The correct answer is Both A. & B..

882Chemical EngineeringMedium

Pick out the wrong statement?

ATin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature

BTin exists in two allotropic forms

CThe predominant use of tin is in the form of coating for steel & copper alloys

DTin can be readily and very easily drawn into very fine wire

Correct answer

D. Tin can be readily and very easily drawn into very fine wire

Explanation

The correct answer is Tin can be readily and very easily drawn into very fine wire.

883Chemical EngineeringMedium

Generation of heat by friction is an example of a/an ________ change?

AAdiabatic

BIsothermal

CIrreversible

DReversible

Correct answer

C. Irreversible

Explanation

The correct answer is Irreversible.

884Chemical EngineeringMedium

________ extractor is used for the concentration of radioactive nuclear waste?

ASieve plate

BPulsed column

CBollman

DMixer-settler

Correct answer

B. Pulsed column

Explanation

The correct answer is Pulsed column.

885Chemical EngineeringMedium

________ is not an important refinery process for upgrading the quality of lubricating oil?

AHydro-treatment

BClay treatment

CSolvent refining

DDeoiling

Correct answer

D. Deoiling

Explanation

The correct answer is Deoiling.

886Chemical EngineeringMedium

Which of the following has the least calorific value (kcal/Nm3)?

ASewage gas

BNatural gas

CCoke oven gas

DBlast furnace gas

Correct answer

D. Blast furnace gas

Explanation

The correct answer is Blast furnace gas.

887Chemical EngineeringMedium

At absolute zero temperature, the ________ of the gas is zero?

APressure

BMass

CNone of these

DVolume

Correct answer

D. Volume

Explanation

The correct answer is Volume.

888Chemical EngineeringMedium

Which of the following relationship is valid for the equilibrium position of the float in a Rotameter? (Where, Df= Drag force on the float Bf = Buoyant force on the float Wf = Weight of the float)?

ADf + Bf = Wf

BNone of these

CDf + Bf + Wf =0

Correct answer

A. Df + Bf = Wf

Explanation

The correct answer is Df + Bf = Wf.

889Chemical EngineeringMedium

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its________?

AHydrolysis tendency in presence of water

BGreater tendency of decomposition at elevated temperature

CAll A, B. and C

DPoor oxidation stability and high gum forming tendency

Correct answer

C. All A, B. and C

Explanation

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

890Chemical EngineeringMedium

Ability of a material to ________ is indicated by its damping capacity?

AAbsorb vibration

BAbsorb shock

CNone of these

DWithstand compression

Correct answer

A. Absorb vibration

Explanation

The correct answer is Absorb vibration.

Pick out the wrong statement?

ATin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature

BTin exists in two allotropic forms

CThe predominant use of tin is in the form of coating for steel & copper alloys

DTin can be readily and very easily drawn into very fine wire

Correct answer

D. Tin can be readily and very easily drawn into very fine wire

Explanation

The correct answer is Tin can be readily and very easily drawn into very fine wire.