MCQs

Chemical Engineering MCQs with Explanations

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3591Chemical EngineeringMedium

Brittleness induced due to the presence of sulphur in steel can be reduced by adding________?

AMagnesium

BVanadium

CCopper

DManganese

Correct answer

D. Manganese

Explanation

The correct answer is Manganese.

3592Chemical EngineeringMedium

Ammonium nitrate is________?

ANot prone to explosive thermal decomposition

BHaving about 40% N2

CNot hygroscopic

DMixed with limestone powder to reduce its explosive nature before using it as a fertilizer

Correct answer

D. Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer

Explanation

The correct answer is Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer.

3593Chemical EngineeringMedium

In case of a plate and frame filter press, filtrate flow through the cake follows ________ flow?

ATurbulent

BLaminar

CPlug

DNone of these

Correct answer

B. Laminar

Explanation

The correct answer is Laminar.

3594Chemical EngineeringMedium

Which is not an alumino-silicate refractory?

AHigh alumina bricks

BTar dolomite bricks

CFireclay bricks

DMullite bricks

Correct answer

B. Tar dolomite bricks

Explanation

The correct answer is Tar dolomite bricks.

3595Chemical EngineeringMedium

Which of the following is affected by the temperature?

AAll A, B. & C

BActivity co-efficient

CFugacity

DFree energy

Correct answer

A. All A, B. & C

Explanation

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

3596Chemical EngineeringMedium

A change in state involving a decrease in entropy can be spontaneous, only if ________?

AIt is exothermic

BIt is isenthalpic

CIt takes place at constant volume

DIt takes place isothermally

Correct answer

A. It is exothermic

Explanation

The correct answer is It is exothermic.

3597Chemical EngineeringMedium

With increase in the capacity of screens, the screen effectiveness________?

AIncreases

BDecreases

CRemains unchanged

DDecreases exponentially

Correct answer

B. Decreases

Explanation

The correct answer is Decreases.

3598Chemical EngineeringMedium

What is the degree of freedom of an absorption process in which only one component is transferred between phases?

Correct answer

D. 3

Explanation

The correct answer is 3.

3599Chemical EngineeringMedium

Evaporation of 1kg of water from a solution in a single effect evaporator requires about ________ kg of steam?

A2 – 2.4

B1.8-2

C1-1.3

D0.4 – 0.6

Correct answer

C. 1-1.3

Explanation

The correct answer is 1-1.3.

3600Chemical EngineeringMedium

Check valves are used________?

AFor unidirectional flow

BAt high pressure

CFor controlling water flow

DIn bends

Correct answer

A. For unidirectional flow

Explanation

The correct answer is For unidirectional flow.

Ammonium nitrate is________?

ANot prone to explosive thermal decomposition

BHaving about 40% N2

CNot hygroscopic

DMixed with limestone powder to reduce its explosive nature before using it as a fertilizer

Correct answer

D. Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer

Explanation

The correct answer is Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer.