MCQs

Chemical Engineering MCQs with Explanations

Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.

45%

3,730 of 8,342MCQs reviewed

Study Mode — explanations are always visiblePrefer a timed quiz? Start test

3731Chemical EngineeringMedium

Weep holes provided in the plates of a distillation column ________?

AFacilitate draining out liquid from a tray when the unit is not in operation

BMust be large enough (usually 1/4′′ to 5/8′′ dia) to prevent plugging but should not deliver

CAll A., B. and C.

DAre normally located near the overflow weir so that any delivery of liquid during operation

Correct answer

C. All A., B. and C.

Explanation

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

3732Chemical EngineeringMedium

In a multiple effect evaporator, the effect of boiling point elevation is to________?

AIncrease the economy

BReduce the economy

CReduce the capacity

DNone of these

Correct answer

C. Reduce the capacity

Explanation

The correct answer is Reduce the capacity.

3733Chemical EngineeringMedium

The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called?

ASmoke point

BKindling temperature

CBurning temperature

DFire point

Correct answer

C. Burning temperature

Explanation

The correct answer is Burning temperature.

3734Chemical EngineeringMedium

Purity of electrical grade aluminium should be ≥ ________ percent?

A90

B99.5

C95

D85

Correct answer

B. 99.5

Explanation

The correct answer is 99.5.

3735Chemical EngineeringMedium

Which of the following, when pyrolysed, produces Perchloroethylene?

ACarbon tetrachloride

BEthylene dichloride

CChlorobenzene

DChlorinated paraffin

Correct answer

A. Carbon tetrachloride

Explanation

The correct answer is Carbon tetrachloride.

3736Chemical EngineeringMedium

The internal energy of an incompressible fluid depends upon its________?

APressure

BBoth A. & B

CNeither A. nor B

DTemperature

Correct answer

D. Temperature

Explanation

The correct answer is Temperature.

3737Chemical EngineeringMedium

The value of ‘angle of nip’ is generally about________?

A52°

B64°

C16°

D32°

Correct answer

D. 32°

Explanation

The correct answer is 32°.

3738Chemical EngineeringMedium

The main size reduction operation in ultrafine grinders is________?

ACompression

BCutting

CImpact

DAttrition

Correct answer

D. Attrition

Explanation

The correct answer is Attrition.

3739Chemical EngineeringMedium

The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be ________ of its original weight?

A1/2

B1/16

C1/8

D1/4

Correct answer

B. 1/16

Explanation

The correct answer is 1/16.

3740Chemical EngineeringMedium

In a shell and tube heat exchanger, the clearance of the tube is generally________?

AEqual to the tube diameter

BMore than the tube diameter

CNot less than one-fourth of the tube diameter or 3/16′′

DMore in case of triangular pitch as compared to the square pitch tube layout

Correct answer

C. Not less than one-fourth of the tube diameter or 3/16′′

Explanation

The correct answer is Not less than one-fourth of the tube diameter or 3/16′′.

Weep holes provided in the plates of a distillation column ________?

AFacilitate draining out liquid from a tray when the unit is not in operation

BMust be large enough (usually 1/4′′ to 5/8′′ dia) to prevent plugging but should not deliver

CAll A., B. and C.

DAre normally located near the overflow weir so that any delivery of liquid during operation

Correct answer

C. All A., B. and C.

Explanation

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

In a shell and tube heat exchanger, the clearance of the tube is generally________?

AEqual to the tube diameter

BMore than the tube diameter

CNot less than one-fourth of the tube diameter or 3/16′′

DMore in case of triangular pitch as compared to the square pitch tube layout

Correct answer

C. Not less than one-fourth of the tube diameter or 3/16′′

Explanation

The correct answer is Not less than one-fourth of the tube diameter or 3/16′′.