MCQs

Chemical Engineering MCQs with Explanations

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3621Chemical EngineeringMedium

Paramagnetism method is not used for the composition determination of ________ in gases?

AAny of these

BOxides of nitrogen

CCarbon dioxide

DOxygen

Correct answer

C. Carbon dioxide

Explanation

The correct answer is Carbon dioxide.

3622Chemical EngineeringMedium

Mass spectrometer is used for the composition analysis of________?

ASolids

BAlloys

CNone of these

DIsotopes

Correct answer

D. Isotopes

Explanation

The correct answer is Isotopes.

3623Chemical EngineeringMedium

Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about ________°C?

A85

B105

C145

D70

Correct answer

B. 105

Explanation

The correct answer is 105.

3624Chemical EngineeringMedium

________ increases with increase in pressure?

ABoth A. and B

BThe melting point of wax

CNeither A. nor B

DThe boiling point of a liquid

Correct answer

A. Both A. and B

Explanation

The correct answer is Both A. and B.

3625Chemical EngineeringMedium

Which of the following accounts for the maximum energy release in the nuclear fission process?

AKinetic energy of neutrons

BInstantaneous release of γ-rays

CKinetic energy of fission products

DRadioactive decay of fission products

Correct answer

C. Kinetic energy of fission products

Explanation

The correct answer is Kinetic energy of fission products.

3626Chemical EngineeringMedium

Penetration theory relates the average mass transfer co-efficient (K) with diffusivity D. as________?

AK ∝D1.5

BK ∝D2

CK ∝D

Correct answer

C. K ∝D

Explanation

The correct answer is K ∝D.

3627Chemical EngineeringMedium

Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the ________ moisture?

AFree

BEquilibrium

CBound

DUnbound

Correct answer

B. Equilibrium

Explanation

The correct answer is Equilibrium.

3628Chemical EngineeringMedium

What is the range of tempering temperature (°C) for most of the materials?

A75-100

B200-300

C500-600

D350-450

Correct answer

B. 200-300

Explanation

The correct answer is 200-300.

3629Chemical EngineeringMedium

Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is________?

Correct answer

B. 2

Explanation

The correct answer is 2.

3630Chemical EngineeringMedium

Nusselt number (for forced convection heat transfer) is a function of the ________ number?

AReynolds

BBoth A. & B.

CPrandtl

DNeither A. nor B.

Correct answer

A. Reynolds

Explanation

The correct answer is Reynolds.

3621Chemical EngineeringMedium

Paramagnetism method is not used for the composition determination of ________ in gases?

AAny of these

BOxides of nitrogen

CCarbon dioxide

DOxygen

Correct answer

C. Carbon dioxide

Explanation

The correct answer is Carbon dioxide.

3622Chemical EngineeringMedium

Mass spectrometer is used for the composition analysis of________?

ASolids

BAlloys

CNone of these

DIsotopes

Correct answer

D. Isotopes

Explanation

The correct answer is Isotopes.

3623Chemical EngineeringMedium

Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about ________°C?

A85

B105

C145

D70

Correct answer

B. 105

Explanation

The correct answer is 105.

3624Chemical EngineeringMedium

________ increases with increase in pressure?

ABoth A. and B

BThe melting point of wax

CNeither A. nor B

DThe boiling point of a liquid

Correct answer

A. Both A. and B

Explanation

The correct answer is Both A. and B.

3625Chemical EngineeringMedium

Which of the following accounts for the maximum energy release in the nuclear fission process?

AKinetic energy of neutrons

BInstantaneous release of γ-rays

CKinetic energy of fission products

DRadioactive decay of fission products

Correct answer

C. Kinetic energy of fission products

Explanation

The correct answer is Kinetic energy of fission products.

3626Chemical EngineeringMedium

Penetration theory relates the average mass transfer co-efficient (K) with diffusivity D. as________?

AK ∝D1.5

BK ∝D2

CK ∝D

Correct answer

C. K ∝D

Explanation

The correct answer is K ∝D.

3627Chemical EngineeringMedium

Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the ________ moisture?

AFree

BEquilibrium

CBound

DUnbound

Correct answer

B. Equilibrium

Explanation

The correct answer is Equilibrium.

3628Chemical EngineeringMedium

What is the range of tempering temperature (°C) for most of the materials?

A75-100

B200-300

C500-600

D350-450

Correct answer

B. 200-300

Explanation

The correct answer is 200-300.

3629Chemical EngineeringMedium

Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is________?

Correct answer

B. 2

Explanation

The correct answer is 2.

3630Chemical EngineeringMedium

Nusselt number (for forced convection heat transfer) is a function of the ________ number?

AReynolds

BBoth A. & B.

CPrandtl

DNeither A. nor B.

Correct answer

A. Reynolds

Explanation

The correct answer is Reynolds.