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Chemical Engineering MCQs with Explanations

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1141Chemical EngineeringMedium

The pH value of oxidised sewage is about________?

A1.8

7.3

C13.4

D6.2

Correct answer

B. 7.3

Explanation

The correct answer is 7.3.

1142Chemical EngineeringMedium

Transistor parts and refrigerator components are normally made of________?

AHigh density polythene

BPolystyrene

CPolyurethane

DPolyester

Correct answer

B. Polystyrene

Explanation

The correct answer is Polystyrene.

1143Chemical EngineeringMedium

________ functions are exemplified by heat and work?

ANone of these

BPoint

CPath

DState

Correct answer

C. Path

Explanation

The correct answer is Path.

1144Chemical EngineeringMedium

Separation of materials of the same density based on their sizes by using then-different rates of flow is called________?

AFlocculation

BSizing

CSorting

DElutriation

Correct answer

B. Sizing

Explanation

The correct answer is Sizing.

1145Chemical EngineeringMedium

Plutonium________?

ANeither A. nor B.

BIs recovered from spent fuel from thermal nuclear reactor

CHas much lower melting point (640°C ) compared to thorium (1690°C)

DBoth A. and B.

Correct answer

D. Both A. and B.

Explanation

The correct answer is Both A. and B..

1146Chemical EngineeringMedium

Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is ________?

AEither A. or B.; depends upon the I.D. of the pipe

BLess

CMore

DSame

Correct answer

B. Less

Explanation

The correct answer is Less.

1147Chemical EngineeringMedium

Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature?

AFlame temperature achieved

BSpeed of combustion of fuel

CHeat transfer rate to the stock in the furnace

DCalorific value of the fuel

Correct answer

D. Calorific value of the fuel

Explanation

The correct answer is Calorific value of the fuel.

1148Chemical EngineeringMedium

When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as________?

AIsotopes

BIsotones

CIsomers

DIsobars

Correct answer

B. Isotones

Explanation

The correct answer is Isotones.

1149Chemical EngineeringMedium

Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ________ microns?

A> 1000

B10 to 25

C< 5

D< 74

Correct answer

D. < 74

Explanation

The correct answer is < 74.

1150Chemical EngineeringMedium

In the cyclone separator used for separation of dust from dust laden gas, the gas?

ABoth B. and C.

BEnters the cyclone from the top

CDevelops a helical motion inside the chamber

DIs admitted tangentially at high velocity

Correct answer

A. Both B. and C.

Explanation

The correct answer is Both B. and C..

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