MCQs

Chemical Engineering MCQs with Explanations

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651Chemical EngineeringMedium

Bunsen burner is an example of a/an ________ burner?

AInside mixing/premix type

BRotary cup

CSubmerged combustion

DOutside mixing/diffusion flame/nozzle mix type

Correct answer

A. Inside mixing/premix type

Explanation

The correct answer is Inside mixing/premix type.

652Chemical EngineeringMedium

For the gaseous reaction 2A → B, where the feed consists of 50 mole % A and 50 mole % inerts, the expansion factor is________?

B-0.5

C-0.25

Correct answer

C. -0.25

Explanation

The correct answer is -0.25.

653Chemical EngineeringMedium

The best lubricants for a machine working at high temperature & load is________?

ASolid lubricant

BGrease

CAnimal oils

DMineral oils

Correct answer

A. Solid lubricant

Explanation

The correct answer is Solid lubricant.

654Chemical EngineeringMedium

Third law of thermodynamics is helpful in________?

ACalculating absolute entropies of substances at different temperature

BBoth B. and C.

CPrediction of the extent of a chemical reaction

DEvaluating entropy changes of chemical reaction

Correct answer

B. Both B. and C.

Explanation

The correct answer is Both B. and C..

655Chemical EngineeringMedium

Which of the following bricks has the most close values of RUL and PCE?

ASilica bricks

BHigh alumina bricks

CTar dolomite bricks

DFireclay bricks

Correct answer

A. Silica bricks

Explanation

The correct answer is Silica bricks.

656Chemical EngineeringMedium

A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson’s ratio of the rod is________?

A0.44

C0.25

D0.33

Correct answer

A. 0.44

Explanation

The correct answer is 0.44.

657Chemical EngineeringMedium

Pick out the wrong statement?

AThe rate of chemical reaction is independent of the concentration of reactants at high

BWine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye

CProtein catalysts are called enzymes

DTotal sugar content in molasses is about 10%

Correct answer

D. Total sugar content in molasses is about 10%

Explanation

The correct answer is Total sugar content in molasses is about 10%.

658Chemical EngineeringMedium

Oxygen required for theoretically complete combustion of 1 Nm3 methane is ________ Nm3?

Correct answer

A. 2

Explanation

The correct answer is 2.

659Chemical EngineeringMedium

Air-petrol ratio for maximum power generation in spark ignition engine is about________?

A18 : 1

B12 : 1

C6 : 1

D24 : 1

Correct answer

B. 12 : 1

Explanation

The correct answer is 12 : 1.

660Chemical EngineeringMedium

Though liquid ammonia itself is a fertilizer (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it________?

AIs in short supply

BHas a pungent smell

CIs toxic and highly corrosive

DVaporises at normal temperature

Correct answer

D. Vaporises at normal temperature

Explanation

The correct answer is Vaporises at normal temperature.

Pick out the wrong statement?

AThe rate of chemical reaction is independent of the concentration of reactants at high

BWine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye

CProtein catalysts are called enzymes

DTotal sugar content in molasses is about 10%

Correct answer

D. Total sugar content in molasses is about 10%

Explanation

The correct answer is Total sugar content in molasses is about 10%.