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Chemical Engineering MCQs with Explanations

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1031Chemical EngineeringMedium

Fluid energy mill comes in the category of________?

ACrusher

Cutter

CGrinder

DUltrafine grinder

Correct answer

D. Ultrafine grinder

Explanation

The correct answer is Ultrafine grinder.

1032Chemical EngineeringMedium

The unit of bulk modulus of elasticity for a liquid in S.I. unit is________?

AN/m2

BN/m

CN/m3

Correct answer

A. N/m2

Explanation

The correct answer is N/m2.

1033Chemical EngineeringMedium

With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop________?

ARemains unchanged

BDecreases

CIncreases

DDecreases exponentially

Correct answer

C. Increases

Explanation

The correct answer is Increases.

1034Chemical EngineeringMedium

In general, the specific heats of aqueous solutions ________ with increase in the concentration of the solute?

ADecrease

BRemain unchanged

CIncrease

DNone of these

Correct answer

A. Decrease

Explanation

The correct answer is Decrease.

1035Chemical EngineeringMedium

The most common packing used in industrial operations is ________ rings?

ALessing

BSingle spiral

CRaschig

DCross-partition

Correct answer

C. Raschig

Explanation

The correct answer is Raschig.

1036Chemical EngineeringMedium

Pressure drop in packed bed for turbulent flow is given by the ________ equation?

ABlake-Plummer

BLeva’s

CHagen-Poiseuille’s

DKozeny-Carman

Correct answer

A. Blake-Plummer

Explanation

The correct answer is Blake-Plummer.

1037Chemical EngineeringMedium

The bulk modulus of elasticity of a liquid________?

AIs zero for incompressible liquid

BIs independent of temperature & pressure

CIncreases with pressure

DDecreases with pressure

Correct answer

C. Increases with pressure

Explanation

The correct answer is Increases with pressure.

1038Chemical EngineeringMedium

The temperature at which the magnetic property of iron disappears (i.e., it becomes nonmagnetic) and its electrical conductivity & specific heat also changes, is called the ‘Curie point’, which is ________ °C?

A908

B1400

C768

D1539

Correct answer

C. 768

Explanation

The correct answer is 768.

1039Chemical EngineeringMedium

Karbate is________?

ACarbon impregnated with resin (usually Bakelite)

BAn acid resistant material

CBoth B. and C.

DA mixture of iron dust and saw dust

Correct answer

C. Both B. and C.

Explanation

The correct answer is Both B. and C..

1040Chemical EngineeringMedium

Mercaptans are________?

AUndesirable in petrol, as they reduce its octane number

BAll A., B. and C.

CAdded in LPG cylinders to detect gas leakage by its smell

DLow boiling sulphur compounds

Correct answer

B. All A., B. and C.

Explanation

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

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