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Chemical Engineering MCQs with Explanations

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1211Chemical EngineeringMedium

The value of fouling factor depends upon the________?

ACharacteristic of process fluid

BSuspended solids in the fluid

CAll A., B. and C.

DVelocity of process fluid containing suspended solids

Correct answer

C. All A., B. and C.

Explanation

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

1212Chemical EngineeringMedium

Which of the following is preferred for riveting?

AButt joint

BEither A. or B.

CNeither A. nor B.

DLap joint

Correct answer

A. Butt joint

Explanation

The correct answer is Butt joint.

1213Chemical EngineeringMedium

Pick out the wrong statement?

AKarbate is an acid resistant material of construction

BAlloys are harder than their component elements

CNichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C

DPresence of silicon in steel decreases its electrical resistance

Correct answer

D. Presence of silicon in steel decreases its electrical resistance

Explanation

The correct answer is Presence of silicon in steel decreases its electrical resistance.

1214Chemical EngineeringMedium

The disintegration rate of a radioactive element ________?

ARemains constant throughout

BProgressively increases

CProgressively decreases

DMay increase or decrease depending on the material

Correct answer

C. Progressively decreases

Explanation

The correct answer is Progressively decreases.

1215Chemical EngineeringMedium

Naphtha yield in straight run distillation of crude oil may be about ________ percent?

A12

C18

Correct answer

D. 6

Explanation

The correct answer is 6.

1216Chemical EngineeringMedium

A typical example of a physical system with under damped characteristic is a________?

AU-tube manometer

BThermocouple kept immersed in a liquid filled thermowell

CCSTR with first order reaction

DSpring loaded diaphragm valve

Correct answer

D. Spring loaded diaphragm valve

Explanation

The correct answer is Spring loaded diaphragm valve.

1217Chemical EngineeringMedium

SiO2 percentage in firebrick is about________?

A> 94

B80-85

C35-40

D55-60

Correct answer

D. 55-60

Explanation

The correct answer is 55-60.

1218Chemical EngineeringMedium

All analogy equations connecting friction factor and heat transfer co-efficient apply only to ________?

ABoth A. and B.

BForm friction

CWall or skin friction

DTurbulent flow

Correct answer

C. Wall or skin friction

Explanation

The correct answer is Wall or skin friction.

1219Chemical EngineeringMedium

The most common standard size of bubble caps used in industrial operation is________?

A8′′ dia cap with 1′′ dia riser

B1′′ dia cap with 0.5′′ dia riser

C4′′ dia cap with 8′′ dia riser

D6′′ dia cap with 4′′ dia riser

Correct answer

D. 6′′ dia cap with 4′′ dia riser

Explanation

The correct answer is 6′′ dia cap with 4′′ dia riser.

1220Chemical EngineeringMedium

A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be________?

A320

B200

C160

D100

Correct answer

B. 200

Explanation

The correct answer is 200.

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