MCQs

Chemical Engineering MCQs with Explanations

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3531Chemical EngineeringMedium

Velocity distribution for flow between two fixed parallel plates________?

AIs constant over the entire cross-section

BIs zero at the plates and increases linearly to the mid-plane

CNone of these

DVaries parabolically across the section

Correct answer

D. Varies parabolically across the section

Explanation

The correct answer is Varies parabolically across the section.

3532Chemical EngineeringMedium

Pick out the correct statement?

AThe rate constant for a first order reaction does not change on changing the concentration units

BA chemical reaction accompanied by absorption of heat is called an exothermic reaction

CChemical equilibrium state is dynamic in nature

DA chemical reaction accompanied by evolution of heat is called an endothermic reaction

Correct answer

A. The rate constant for a first order reaction does not change on changing the concentration units

Explanation

The correct answer is The rate constant for a first order reaction does not change on changing the concentration units.

3533Chemical EngineeringMedium

A minimum clearance of about ________ mm is maintained between the distillation column wall and the bubble cap?

A95

B67

C38

D19

Correct answer

C. 38

Explanation

The correct answer is 38.

3534Chemical EngineeringMedium

Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the ________ filtration?

AConstant rate

BVarying pressure

CConstant pressure

DVarying rate

Correct answer

A. Constant rate

Explanation

The correct answer is Constant rate.

3535Chemical EngineeringMedium

Which of the following air pollutants is not toxic to vegetation i.e., doesn’t cause vegetation damage?

ASmog & ozone

BHydrogen fluoride & nitrogen oxides

CCarbon monoxide

DSulphur dioxide & spray of weed killers

Correct answer

C. Carbon monoxide

Explanation

The correct answer is Carbon monoxide.

3536Chemical EngineeringMedium

The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop of ________ fluid?

ANewtonian

BPseudo-plastic

CBingham plastic

DDilatent

Correct answer

D. Dilatent

Explanation

The correct answer is Dilatent.

3537Chemical EngineeringMedium

Large scale fire on fuel gas line is normally extinguished by________?

AFoam

BWater

CNitrogen

DSteam

Correct answer

C. Nitrogen

Explanation

The correct answer is Nitrogen.

3538Chemical EngineeringMedium

Harmonic mean temperature difference is given by________?

A2 (ΔT1. ΔT2)/(ΔT1 + ΔT2)

B√(ΔT1. ΔT2)

C(ΔT1 – ΔT2)/(ΔT1. ΔT2)

Correct answer

A. 2 (ΔT1. ΔT2)/(ΔT1 + ΔT2)

Explanation

The correct answer is 2 (ΔT1. ΔT2)/(ΔT1 + ΔT2).

3539Chemical EngineeringMedium

One ton of refrigeration capacity is equivalent to the heat removal rate of________?

A200 BTU/day

B200 BTU/minute

C200 BTU/hr

D50 kcal/hr

Correct answer

B. 200 BTU/minute

Explanation

The correct answer is 200 BTU/minute.

3540Chemical EngineeringMedium

Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory________?

ANone of these

BCastables

CCements

DMortars

Correct answer

B. Castables

Explanation

The correct answer is Castables.

Pick out the correct statement?

AThe rate constant for a first order reaction does not change on changing the concentration units

BA chemical reaction accompanied by absorption of heat is called an exothermic reaction

CChemical equilibrium state is dynamic in nature

DA chemical reaction accompanied by evolution of heat is called an endothermic reaction

Correct answer

A. The rate constant for a first order reaction does not change on changing the concentration units

Explanation

The correct answer is The rate constant for a first order reaction does not change on changing the concentration units.