MCQs

Chemical Engineering MCQs with Explanations

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3291Chemical EngineeringMedium

Styrene butadiene rubber is commercially manufactured by________?

ASuspension polymerisation

BBulk polymerisation

CEmulsion polymerisation

DSolution polymerisation

Correct answer

C. Emulsion polymerisation

Explanation

The correct answer is Emulsion polymerisation.

3292Chemical EngineeringMedium

Ceramic materials fabrication cannot be done by________?

AExtrusion

BPlastic pressing

CWelding

DSlip casting

Correct answer

C. Welding

Explanation

The correct answer is Welding.

3293Chemical EngineeringMedium

In case of a, centrifugal pump, the ratio h1/h2 is termed as the ________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

AOverall

BMechanical

CVolumetric

DImpeller

Correct answer

B. Mechanical

Explanation

The correct answer is Mechanical.

3294Chemical EngineeringMedium

Gross heating value of coal is ________ the net heating value?

ASame as

BHigher than

CEither A. or B.; depends on the type of coal

DLower than

Correct answer

B. Higher than

Explanation

The correct answer is Higher than.

3295Chemical EngineeringMedium

The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is________?

B< 1

Correct answer

B. < 1

Explanation

The correct answer is < 1.

3296Chemical EngineeringMedium

Austenitic manganese steel used for making jaws of crushing machines contains about ________ percent manganese?

A3.5-4.5

B1.5-2

C12-14

D7-9

Correct answer

C. 12-14

Explanation

The correct answer is 12-14.

3297Chemical EngineeringMedium

The time of oscillation of a floating body is ________?

AIndependent of the Metacentric height

BDependent on the buoyant forces only

CNone of these

DLonger, if Metacentric height is increased

Correct answer

C. None of these

Explanation

The correct answer is None of these.

3298Chemical EngineeringMedium

The experimental response of the controlled variable y(t) for a step change of magnitude ‘P’ in the manipulated variable x(t) is shown below: The appropriate transfer function of the process is________?

A(Q/R) e-TdS/(Q/P) (S + 1)

B(Q/P) e-TdS/(Q/R) (S + 1)

C(Q/R) e-(P/Q)S/(TdS + 1)

D(Q/P) e-(Q/R)S/(TdS + 1)

Correct answer

B. (Q/P) e-TdS/(Q/R) (S + 1)

Explanation

The correct answer is (Q/P) e-TdS/(Q/R) (S + 1).

3299Chemical EngineeringMedium

A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2; then the partial pressure of N2 in the mixture will be ________ kgf/cm2?

Correct answer

A. 1

Explanation

The correct answer is 1.

3300Chemical EngineeringMedium

A gas can be liquefied by pressure alone only, when its temperature is ________ its critical temperature?

AMore than

BLess than

CLess than or equal to

DEqual to or higher than

Correct answer

C. Less than or equal to

Explanation

The correct answer is Less than or equal to.

3291Chemical EngineeringMedium

Styrene butadiene rubber is commercially manufactured by________?

ASuspension polymerisation

BBulk polymerisation

CEmulsion polymerisation

DSolution polymerisation

Correct answer

C. Emulsion polymerisation

Explanation

The correct answer is Emulsion polymerisation.

3292Chemical EngineeringMedium

Ceramic materials fabrication cannot be done by________?

AExtrusion

BPlastic pressing

CWelding

DSlip casting

Correct answer

C. Welding

Explanation

The correct answer is Welding.

3293Chemical EngineeringMedium

In case of a, centrifugal pump, the ratio h1/h2 is termed as the ________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

AOverall

BMechanical

CVolumetric

DImpeller

Correct answer

B. Mechanical

Explanation

The correct answer is Mechanical.

3294Chemical EngineeringMedium

Gross heating value of coal is ________ the net heating value?

ASame as

BHigher than

CEither A. or B.; depends on the type of coal

DLower than

Correct answer

B. Higher than

Explanation

The correct answer is Higher than.

3295Chemical EngineeringMedium

The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is________?

B< 1

Correct answer

B. < 1

Explanation

The correct answer is < 1.

3296Chemical EngineeringMedium

Austenitic manganese steel used for making jaws of crushing machines contains about ________ percent manganese?

A3.5-4.5

B1.5-2

C12-14

D7-9

Correct answer

C. 12-14

Explanation

The correct answer is 12-14.

3297Chemical EngineeringMedium

The time of oscillation of a floating body is ________?

AIndependent of the Metacentric height

BDependent on the buoyant forces only

CNone of these

DLonger, if Metacentric height is increased

Correct answer

C. None of these

Explanation

The correct answer is None of these.

3298Chemical EngineeringMedium

The experimental response of the controlled variable y(t) for a step change of magnitude ‘P’ in the manipulated variable x(t) is shown below: The appropriate transfer function of the process is________?

A(Q/R) e-TdS/(Q/P) (S + 1)

B(Q/P) e-TdS/(Q/R) (S + 1)

C(Q/R) e-(P/Q)S/(TdS + 1)

D(Q/P) e-(Q/R)S/(TdS + 1)

Correct answer

B. (Q/P) e-TdS/(Q/R) (S + 1)

Explanation

The correct answer is (Q/P) e-TdS/(Q/R) (S + 1).

3299Chemical EngineeringMedium

A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2; then the partial pressure of N2 in the mixture will be ________ kgf/cm2?

Correct answer

A. 1

Explanation

The correct answer is 1.

3300Chemical EngineeringMedium

A gas can be liquefied by pressure alone only, when its temperature is ________ its critical temperature?

AMore than

BLess than

CLess than or equal to

DEqual to or higher than

Correct answer

C. Less than or equal to

Explanation

The correct answer is Less than or equal to.