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Chemical Engineering MCQs with Explanations

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141Chemical EngineeringMedium

DDT is shipped in________?

AStainless steel containers

BFibre drums

CEither B. or C.

DPaper bags

Correct answer

C. Either B. or C.

Explanation

The correct answer is Either B. or C..

142Chemical EngineeringMedium

Addition of small amount of ________ to grey cast iron is done to produce nodular grey cast iron?

AMagnesium

BManganese

CPhosphorous

DChromium

Correct answer

A. Magnesium

Explanation

The correct answer is Magnesium.

143Chemical EngineeringMedium

Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele’s method, this method________?

Ais more accurate in finding the number of equilibrium stages

Baccounts for the enthalpy changes in the process

CAll A, B. & C.

DFacilitates direct calculation of heat load on reboiler & condenser from, the diagram used in

Correct answer

C. All A, B. & C.

Explanation

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

144Chemical EngineeringMedium

The fermenter used in the production of penicillin (by deep fermentation process) is made of________?

AHigh silicon cast iron

BGlass lined steel

CPorcelain

DGlass

Correct answer

B. Glass lined steel

Explanation

The correct answer is Glass lined steel.

145Chemical EngineeringMedium

________ iron is the purest form of iron?

AWrought

BCast

CHigh silicon

DPig

Correct answer

A. Wrought

Explanation

The correct answer is Wrought.

146Chemical EngineeringMedium

Potassic fertilizer is graded based on its ________ content?

AK2O

BKCl

CK2SO4

DKNO3

Correct answer

A. K2O

Explanation

The correct answer is K2O.

147Chemical EngineeringMedium

The head developed by a centrifugal pump is largely determined by the________?

APower of the pump

BNature of the liquid being pumped

CVapour pressure of the liquid

DAngle of the vanes and the speed of the tip of the impeller

Correct answer

D. Angle of the vanes and the speed of the tip of the impeller

Explanation

The correct answer is Angle of the vanes and the speed of the tip of the impeller.

148Chemical EngineeringMedium

Sedimentation on commercial scale occurs in________?

AClassifiers

BCyclones

CRotary drum filters

DThickeners

Correct answer

C. Rotary drum filters

Explanation

The correct answer is Rotary drum filters.

149Chemical EngineeringMedium

In case of a pipe of constant cross-sectional area, the maximum fluid velocity obtainable is________?

ADependent on its cross-sectional area

BDependent on fluid viscosity

CThe velocity of sound

DDependent on fluid density

Correct answer

C. The velocity of sound

Explanation

The correct answer is The velocity of sound.

150Chemical EngineeringMedium

Which of the following is the most suitable abrasive for grinding high tensile strength materials?

AAluminium oxide

BBoron carbide

CCorundum

DSilicon carbide

Correct answer

A. Aluminium oxide

Explanation

The correct answer is Aluminium oxide.

Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele’s method, this method________?

Ais more accurate in finding the number of equilibrium stages

Baccounts for the enthalpy changes in the process

CAll A, B. & C.

DFacilitates direct calculation of heat load on reboiler & condenser from, the diagram used in

Correct answer

C. All A, B. & C.

Explanation

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

The head developed by a centrifugal pump is largely determined by the________?

APower of the pump

BNature of the liquid being pumped

CVapour pressure of the liquid

DAngle of the vanes and the speed of the tip of the impeller

Correct answer

D. Angle of the vanes and the speed of the tip of the impeller

Explanation

The correct answer is Angle of the vanes and the speed of the tip of the impeller.