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Chemical Engineering MCQs with Explanations

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1291Chemical EngineeringMedium

________ steel is widely used for the manufacture of motor car crankshafts?

AHigh speed

Silicon

CNickel

DChrome

Correct answer

D. Chrome

Explanation

The correct answer is Chrome.

1292Chemical EngineeringMedium

________ is concerned with the adsorption equilibria?

AFick’s law

BFreundlich equation

CGibb’s equation

DNone of these

Correct answer

B. Freundlich equation

Explanation

The correct answer is Freundlich equation.

1293Chemical EngineeringMedium

Rate of leaching increases with increasing________?

ATemperature

BSize of the solid

CPressure

DViscosity of solvent

Correct answer

A. Temperature

Explanation

The correct answer is Temperature.

1294Chemical EngineeringMedium

Ash content in the coke produced from a coking coal having 20% ash may be around ________ percent?

A18

B24

C12

Correct answer

B. 24

Explanation

The correct answer is 24.

1295Chemical EngineeringMedium

Sticky material can be dried in a ________ dryer?

ATray

BNone of these

CFluidised bed

DRotary

Correct answer

A. Tray

Explanation

The correct answer is Tray.

1296Chemical EngineeringMedium

Thermistors are made of________?

AIron-copper alloys

BUltra pure metals

CMetal oxides

DNickel-chromium alloys

Correct answer

C. Metal oxides

Explanation

The correct answer is Metal oxides.

1297Chemical EngineeringMedium

For a neutral solution (pH = 7), the value of [H+] [OH-] is equal to________?

Correct answer

A. 1

Explanation

The correct answer is 1.

1298Chemical EngineeringMedium

The crystallisation of a solute from a solution may be done by________?

ARemoval of pure solvent by evaporation

BChange of temperature thereby causing super-saturation

CAll A., B. & C.

DChanging the nature of the system by the addition of a more soluble material

Correct answer

C. All A., B. & C.

Explanation

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

1299Chemical EngineeringMedium

While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about ________ °C?

A4500

B6000

C2000

D3000

Correct answer

A. 4500

Explanation

The correct answer is 4500.

1300Chemical EngineeringMedium

An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is________?

A0.5000

B0.5055

C0.2528

D0.2500

Correct answer

B. 0.5055

Explanation

The correct answer is 0.5055.

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