MCQs

Chemical Engineering MCQs with Explanations

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2871Chemical EngineeringMedium

Presence of ________ in a dry gaseous fuel does not contribute to its calorific value?

ACarbon

BHydrogen

COxygen

DSulphur

Correct answer

C. Oxygen

Explanation

The correct answer is Oxygen.

2872Chemical EngineeringMedium

________ Equation predicts the activity co-efficient from experimental data?

ALewis-Randall

BVan Laar

CMargules

DBoth B. & C.

Correct answer

D. Both B. & C.

Explanation

The correct answer is Both B. & C..

2873Chemical EngineeringMedium

In jet refrigerators, the refrigerating fluid is practically always________?

AAmmonia

BFreon

CBrine

DWater

Correct answer

D. Water

Explanation

The correct answer is Water.

2874Chemical EngineeringMedium

For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for dia of the tank in question), the thickness of the courses of shell________?

ARemains same throughout

BDecreases upwards

CMay decrease or increase upwards depending upon whether vacuum or positive pressure

DIncreases upwards

Correct answer

B. Decreases upwards

Explanation

The correct answer is Decreases upwards.

2875Chemical EngineeringMedium

Production of one ton of paper in Indian paper industry consumes about ________ kWh of electricity?

A800

B1400

C300

D2000

Correct answer

B. 1400

Explanation

The correct answer is 1400.

2876Chemical EngineeringMedium

Froth floatation is used for________?

AWashing fine coal dust (< 0.5 mm size)

BAll A., B. and C.

CWashing lump coal (> 80 mm size)

DRemoving ash from the coal based on difference in specific gravity of coal and ash

Correct answer

A. Washing fine coal dust (< 0.5 mm size)

Explanation

The correct answer is Washing fine coal dust (< 0.5 mm size).

2877Chemical EngineeringMedium

Neoprene is a________?

ANone of these

BMonomer

CSynthetic rubber

DPolyester

Correct answer

C. Synthetic rubber

Explanation

The correct answer is Synthetic rubber.

2878Chemical EngineeringMedium

Cd for the orifice plate varies from ________?

A0.58 to 0.8

B0.93 to 0.98

C0.02 to 0.03

D0.2 to 0.3

Correct answer

A. 0.58 to 0.8

Explanation

The correct answer is 0.58 to 0.8.

2879Chemical EngineeringMedium

Pick out the wrong statement?

AThe temperature at which a vapor is saturated is termed as the boiling point

BA vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a ‘superheated vapor’

CThe difference between the existing temperature of a vapor and its saturation temperature (i.e.dew point) is called its ‘degree of superheat’

DA vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure

Correct answer

A. The temperature at which a vapor is saturated is termed as the boiling point

Explanation

The correct answer is The temperature at which a vapor is saturated is termed as the boiling point.

2880Chemical EngineeringMedium

A control rod________?

AIs generally made of boron, hafnium or cadmium

BShould have small absorption cross-section

CShould have large absorption cross-section

DBoth B. and C.

Correct answer

D. Both B. and C.

Explanation

The correct answer is Both B. and C..

Froth floatation is used for________?

AWashing fine coal dust (< 0.5 mm size)

BAll A., B. and C.

CWashing lump coal (> 80 mm size)

DRemoving ash from the coal based on difference in specific gravity of coal and ash

Correct answer

A. Washing fine coal dust (< 0.5 mm size)

Explanation

The correct answer is Washing fine coal dust (< 0.5 mm size).

Pick out the wrong statement?

AThe temperature at which a vapor is saturated is termed as the boiling point

BA vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a ‘superheated vapor’

CThe difference between the existing temperature of a vapor and its saturation temperature (i.e.dew point) is called its ‘degree of superheat’

DA vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure

Correct answer

A. The temperature at which a vapor is saturated is termed as the boiling point

Explanation

The correct answer is The temperature at which a vapor is saturated is termed as the boiling point.