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Chemical Engineering MCQs with Explanations

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91Chemical EngineeringMedium

Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in ________ in the electrical resistance of the wire?

AExponential decrease

BDecrease

CNo change

DIncrease

Correct answer

D. Increase

Explanation

The correct answer is Increase.

92Chemical EngineeringMedium

Sodium chloride content in sea water is about ________ gms/liter?

A10

B25

D50

Correct answer

B. 25

Explanation

The correct answer is 25.

93Chemical EngineeringMedium

Crude petroleum oil is a ________ fuel?

APrimary

BFossil

CSecondary

DBoth A. & B.

Correct answer

D. Both A. & B.

Explanation

The correct answer is Both A. & B..

94Chemical EngineeringMedium

Refractory materials are never used in the construction of ________?

AOrton cones

BPressure vessels

COvens & retorts

DSegar cones

Correct answer

B. Pressure vessels

Explanation

The correct answer is Pressure vessels.

95Chemical EngineeringMedium

Polypropylene compared to polythene is________?

AStronger

BLighter

CHarder

DAll A., B. and C.

Correct answer

D. All A., B. and C.

Explanation

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

96Chemical EngineeringMedium

Presence of cobalt in steel improves its________?

ATensile strength

BNone of these

CCorrosion resistance

DCutting ability

Correct answer

D. Cutting ability

Explanation

The correct answer is Cutting ability.

97Chemical EngineeringMedium

Closeness of packing is maximum in case of ________ crystal lattice?

AFace centred

BSimple cubic

CNone of these

DBody centred

Correct answer

A. Face centred

Explanation

The correct answer is Face centred.

98Chemical EngineeringMedium

Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the________?

AHigh evaporation losses of water

BNone of these

CHigh pressure drop of the gas

DDifficulty in its fabrication

Correct answer

C. High pressure drop of the gas

Explanation

The correct answer is High pressure drop of the gas.

99Chemical EngineeringMedium

Dean number is concerned with the________?

APsychrometry

BFluid flow through helical pipes

CPower consumption in agitated vessels

DFluid-particle interaction

Correct answer

B. Fluid flow through helical pipes

Explanation

The correct answer is Fluid flow through helical pipes.

100Chemical EngineeringMedium

In a shell and tube heat exchanger, tube side ________ of the mass velocity?

APressure drop is proportional to the square

BNeither A. nor B.

CBoth A. & B.

DHeat transfer co-efficient is proportional to 0.8th power

Correct answer

C. Both A. & B.

Explanation

The correct answer is Both A. & B..

91Chemical EngineeringMedium

Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in ________ in the electrical resistance of the wire?

AExponential decrease

BDecrease

CNo change

DIncrease

Correct answer

D. Increase

Explanation

The correct answer is Increase.

92Chemical EngineeringMedium

Sodium chloride content in sea water is about ________ gms/liter?

A10

B25

D50

Correct answer

B. 25

Explanation

The correct answer is 25.

93Chemical EngineeringMedium

Crude petroleum oil is a ________ fuel?

APrimary

BFossil

CSecondary

DBoth A. & B.

Correct answer

D. Both A. & B.

Explanation

The correct answer is Both A. & B..

94Chemical EngineeringMedium

Refractory materials are never used in the construction of ________?

AOrton cones

BPressure vessels

COvens & retorts

DSegar cones

Correct answer

B. Pressure vessels

Explanation

The correct answer is Pressure vessels.

95Chemical EngineeringMedium

Polypropylene compared to polythene is________?

AStronger

BLighter

CHarder

DAll A., B. and C.

Correct answer

D. All A., B. and C.

Explanation

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

96Chemical EngineeringMedium

Presence of cobalt in steel improves its________?

ATensile strength

BNone of these

CCorrosion resistance

DCutting ability

Correct answer

D. Cutting ability

Explanation

The correct answer is Cutting ability.

97Chemical EngineeringMedium

Closeness of packing is maximum in case of ________ crystal lattice?

AFace centred

BSimple cubic

CNone of these

DBody centred

Correct answer

A. Face centred

Explanation

The correct answer is Face centred.

98Chemical EngineeringMedium

Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the________?

AHigh evaporation losses of water

BNone of these

CHigh pressure drop of the gas

DDifficulty in its fabrication

Correct answer

C. High pressure drop of the gas

Explanation

The correct answer is High pressure drop of the gas.

99Chemical EngineeringMedium

Dean number is concerned with the________?

APsychrometry

BFluid flow through helical pipes

CPower consumption in agitated vessels

DFluid-particle interaction

Correct answer

B. Fluid flow through helical pipes

Explanation

The correct answer is Fluid flow through helical pipes.

100Chemical EngineeringMedium

In a shell and tube heat exchanger, tube side ________ of the mass velocity?

APressure drop is proportional to the square

BNeither A. nor B.

CBoth A. & B.

DHeat transfer co-efficient is proportional to 0.8th power

Correct answer

C. Both A. & B.

Explanation

The correct answer is Both A. & B..