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Chemical Engineering MCQs with Explanations

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401Chemical EngineeringMedium

Which of the following may prove unsuitable for filtering volatile liquids?

AGravity filter

BPressure filter

CVacuum filter

DCentrifugal filter

Correct answer

C. Vacuum filter

Explanation

The correct answer is Vacuum filter.

402Chemical EngineeringMedium

The chlorinator used in the manufacture of DDT is made of________?

ATeflon

BBakelite

CGlass

DGlass lined steel

Correct answer

D. Glass lined steel

Explanation

The correct answer is Glass lined steel.

403Chemical EngineeringMedium

A/an ________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor?

ANone of these

BClosed

CIsolated

DOpen

Correct answer

D. Open

Explanation

The correct answer is Open.

404Chemical EngineeringMedium

Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling?

ANone of these

BDiagonal square pitch

CSquare pitch

DTriangular pitch

Correct answer

D. Triangular pitch

Explanation

The correct answer is Triangular pitch.

405Chemical EngineeringMedium

Tube expansion allowances exist in ________ heat exchanger?

AU-tube

BMultipass fixed tube sheet

CNone of these

DSingle pass fixed tube sheet

Correct answer

A. U-tube

Explanation

The correct answer is U-tube.

406Chemical EngineeringMedium

A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is ________?

A0.5

CData insufficient, can’t be predicted

D0.33

Correct answer

B. 1

Explanation

The correct answer is 1.

407Chemical EngineeringMedium

Babbitt metal is not a________?

ATin base alloy

BLead base alloy

CPure metal

DWhite metal

Correct answer

C. Pure metal

Explanation

The correct answer is Pure metal.

408Chemical EngineeringMedium

During sewage treatment, the sewage is subjected to ________ treatment in Imhoff tank?

ADigestion

BBoth B. and C.

CSedimentation

DFiltration

Correct answer

B. Both B. and C.

Explanation

The correct answer is Both B. and C..

409Chemical EngineeringMedium

For contacting a highly soluble gas with a liquid ________?

ABubble the gas through liquid

BSpray the liquid on gas stream

CNone of these

DEither A. or B. would suffice

Correct answer

A. Bubble the gas through liquid

Explanation

The correct answer is Bubble the gas through liquid.

410Chemical EngineeringMedium

Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly ________ substances?

AInorganic

BOrganic

CNone of these

DRadioactive

Correct answer

A. Inorganic

Explanation

The correct answer is Inorganic.

401Chemical EngineeringMedium

Which of the following may prove unsuitable for filtering volatile liquids?

AGravity filter

BPressure filter

CVacuum filter

DCentrifugal filter

Correct answer

C. Vacuum filter

Explanation

The correct answer is Vacuum filter.

402Chemical EngineeringMedium

The chlorinator used in the manufacture of DDT is made of________?

ATeflon

BBakelite

CGlass

DGlass lined steel

Correct answer

D. Glass lined steel

Explanation

The correct answer is Glass lined steel.

403Chemical EngineeringMedium

A/an ________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor?

ANone of these

BClosed

CIsolated

DOpen

Correct answer

D. Open

Explanation

The correct answer is Open.

404Chemical EngineeringMedium

Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling?

ANone of these

BDiagonal square pitch

CSquare pitch

DTriangular pitch

Correct answer

D. Triangular pitch

Explanation

The correct answer is Triangular pitch.

405Chemical EngineeringMedium

Tube expansion allowances exist in ________ heat exchanger?

AU-tube

BMultipass fixed tube sheet

CNone of these

DSingle pass fixed tube sheet

Correct answer

A. U-tube

Explanation

The correct answer is U-tube.

406Chemical EngineeringMedium

A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is ________?

A0.5

CData insufficient, can’t be predicted

D0.33

Correct answer

B. 1

Explanation

The correct answer is 1.

407Chemical EngineeringMedium

Babbitt metal is not a________?

ATin base alloy

BLead base alloy

CPure metal

DWhite metal

Correct answer

C. Pure metal

Explanation

The correct answer is Pure metal.

408Chemical EngineeringMedium

During sewage treatment, the sewage is subjected to ________ treatment in Imhoff tank?

ADigestion

BBoth B. and C.

CSedimentation

DFiltration

Correct answer

B. Both B. and C.

Explanation

The correct answer is Both B. and C..

409Chemical EngineeringMedium

For contacting a highly soluble gas with a liquid ________?

ABubble the gas through liquid

BSpray the liquid on gas stream

CNone of these

DEither A. or B. would suffice

Correct answer

A. Bubble the gas through liquid

Explanation

The correct answer is Bubble the gas through liquid.

410Chemical EngineeringMedium

Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly ________ substances?

AInorganic

BOrganic

CNone of these

DRadioactive

Correct answer

A. Inorganic

Explanation

The correct answer is Inorganic.