Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 258 of 557.

Chemical Engineering MCQs

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Pick out the correct statement?

A.All A., B. and C.

B.For identical gas flow rates, less pressure drop occurs through a plate tower than through a

C.For the same duty, plate columns weigh less than packed columns

D.Plate column can handle greater liquid loads without flooding than packed column, but the

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

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The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is________?

A.-ve

B.0

Explanation: The correct answer is -ve.

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Which of the following is not a composition measuring instrument?

A.Mass spectrometer

B.Hot wire anemometer

C.Thermal conductivity cell

D.Polarograph

Explanation: The correct answer is Hot wire anemometer.

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Graphite is a/an________?

A.Both B. and C.

B.Allotrope of carbon

C.Moderator used in nuclear reactor

D.Electrical insulator

Explanation: The correct answer is Both B. and C..

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Babbitt metal used for making bearings should have________?

A.Ability to retain lubricant on its surface

B.Both B. & C.

C.Low co-efficient of friction between journal and bearing

D.High co-efficient of friction between journal and bearing

Explanation: The correct answer is High co-efficient of friction between journal and bearing.

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The reaction, C + CO2 ↔ 2CO, taking place during coal gasification is called the ________ reaction?

A.Shift conversion

B.Neumann reversal

C.Boudouard

D.Reduction

Explanation: The correct answer is Boudouard.

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Maxwell’s relation corresponding to the identity, dH = dS = Vdp + Σμi dni is________?

A.(∂S/∂V)T, ni = (∂P/∂T)V, ni

B.(∂S/∂P)T, ni = (∂V/∂T)P, ni

C.(∂T/∂V)S, ni = -(∂P/∂S)V, ni

D.(∂T/∂P)S, ni = (∂V/∂S)P, ni

Explanation: The correct answer is (∂T/∂P)S, ni = (∂V/∂S)P, ni.

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The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as________?

A.Tough

B.Plastic

C.Ductile

D.Rigid

Explanation: The correct answer is Ductile.

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________ is an ore of lead?

A.Chalcopyrite

B.Quartz

C.Siderite

D.Galena

Explanation: The correct answer is Galena.

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CnH2n is the general formula for________?

A.Both A. and B.

B.Neither A. nor B.

C.Naphthenes

D.Olefins

Explanation: The correct answer is Both A. and B..

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Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about ________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C?

A.5

B.40

C.20

D.60

Explanation: The correct answer is 20.

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If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) ⇌ C3H8(g) will be ________ Kcal?

A.55.2

B.-19.4

C.-30.2

Explanation: The correct answer is -19.4.

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Clay treatment is used to remove ________?

A.None of these

B.Colour & dissolved gases from cracked gasoline

C.Wax from lube oil

D.Salt from the crude oil

Explanation: The correct answer is Wax from lube oil.

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Pick out the wrong statement?

A.Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels

B.Water gas is called blue gas because of the color of the flame, when it is burnt

C.Acetylene gas cannot be used for illumination purpose

D.Strongly caking coal should not be used in the Lurgi gasifier

Explanation: The correct answer is Acetylene gas cannot be used for illumination purpose.

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When the coal is heated in absence of air, it is called its ________?

A.Gasification

B.Coalification

C.Carbonisation

D.Deoxidation

Explanation: The correct answer is Carbonisation.

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