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Chemical Engineering MCQs with Explanations

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1751Chemical EngineeringMedium

The total change in the enthalpy of a system is independent of the ________?

Number of intermediate chemical reactions involved

BNone of these

CPressure and temperature

DState of combination and aggregation in the beginning and at the end of the reaction

Correct answer

A. Number of intermediate chemical reactions involved

Explanation

The correct answer is Number of intermediate chemical reactions involved.

1752Chemical EngineeringMedium

Smoke point of kerosene expresses its________?

ABurning characteristics

BLamp wick wetting characteristics

CLuminosity characteristics

DAromatic content directly

Correct answer

A. Burning characteristics

Explanation

The correct answer is Burning characteristics.

1753Chemical EngineeringMedium

Maximum apparent porosity of magnesite bricks is about ________ percent?

A24

B44

D58

Correct answer

A. 24

Explanation

The correct answer is 24.

1754Chemical EngineeringMedium

The fuel ratio of a coal is________?

AThe ratio of its percentage of fixed carbon to that of volatile matter

BNeither A. nor B.

CHelpful in estimation of its rank

DBoth A. and B.

Correct answer

D. Both A. and B.

Explanation

The correct answer is Both A. and B..

1755Chemical EngineeringMedium

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

ACyaniding

BSherardizing

CNone of these

DSpheroidising

Correct answer

A. Cyaniding

Explanation

The correct answer is Cyaniding.

1756Chemical EngineeringMedium

For flow through a venturi at a particular discharge, the correct relationships among velocities at point X, Y and Z would be ________?

AV2 > V1 and V2 > V3

BV1 < V2 < V3

CNone of these

Correct answer

A. V2 > V1 and V2 > V3

Explanation

The correct answer is V2 > V1 and V2 > V3.

1757Chemical EngineeringMedium

Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as________?

APolyacrylonitrile

BPeroxyacetyl nitrate (PAN) or methyl nitrite

CPhotochemical smog

DBenzopyrene

Correct answer

B. Peroxyacetyl nitrate (PAN) or methyl nitrite

Explanation

The correct answer is Peroxyacetyl nitrate (PAN) or methyl nitrite.

1758Chemical EngineeringMedium

Reid vapour pressure of gasoline is the measure of its________?

ACloud point

BCarbon residue

CPour point

DVapour locking tendency

Correct answer

D. Vapour locking tendency

Explanation

The correct answer is Vapour locking tendency.

1759Chemical EngineeringMedium

Which of the following variables does not affect the furnace capacity?

ARatio of wall surface to surface of stock

BGas velocity in furnace

CNone of these

DSize of the furnace

Correct answer

C. None of these

Explanation

The correct answer is None of these.

1760Chemical EngineeringMedium

________ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower?

APeclet

BLewis

CStanton

DSherwood

Correct answer

B. Lewis

Explanation

The correct answer is Lewis.

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