Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 95 of 557.

Chemical Engineering MCQs

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Pick out the wrong unit conversion of thermal conductivity?

A.1 BTU/ft2.hr.°F/ft = 1.488 kcal/m2. hr.°C/m

B.1 BTU/ft2.hr.°F/inch = 1.488 kcal/m2. hr.°C/m

C.1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F

D.1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K

Explanation: The correct answer is 1 BTU/ft2.hr.°F/inch = 1.488 kcal/m2. hr.°C/m.

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Electronic structure of a material is generally studied by________?

A.Spectroscopic techniques

B.X-ray

C.Metallurgical microscope

D.Electron diffraction

Explanation: The correct answer is Spectroscopic techniques.

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A pyranometer is an instrument used for measuring the________?

A.Beam radiation

B.None of these

C.Bright sunshine period

D.Global radiation

Explanation: The correct answer is Global radiation.

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Hot, lumpy & abrasive materials are best transported by using a/an ________ conveyor?

A.Flight

B.Belt

C.Screw

D.Apron

Explanation: The correct answer is Apron.

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Porosity of fireclay refractories is ________ percent?

A.5-10

B.25-35

C.35-50

D.10-25

Explanation: The correct answer is 10-25.

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Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas)________?

A.T

B.1/√T

C.T2

Explanation: The correct answer is T.

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The difference between gross & net calorific values of fuel is due to the________?

A.Heat lost by radiation

B.Heat carried away by the steam from the moisture content of the fuel

C.Sensible heat carried away by the flue gases

D.Heat carried away by steam from the combustion of hydrogen in the fuel

Explanation: The correct answer is Heat carried away by steam from the combustion of hydrogen in the fuel.

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The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the________?

A.Fluid velocity

B.Pipe roughness & pipe diameter

C.Both B. & C.

D.Type of flowing fluid

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

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The ratio of shear stress to shear strain is called ________?

A.Modulus of elasticity

B.Shear modulus

C.Bulk modulus

D.Modulus of rigidity

Explanation: The correct answer is Shear modulus.

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A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be ________ metres?

A.5.5

B.8

C.4

D.2

Explanation: The correct answer is 2.

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The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is________?

A.0.95

B.0.1

C.0.55

D.1.85

Explanation: The correct answer is 0.95.

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Ethanolamine is an absorbent used for the removal of ________ from air/gas?

A.SO2

B.H2S

C.Both B. & C.

D.HF

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

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Calculation of mass transfer co-efficient is mostly/normally done using ________ theory?

A.Film

B.Surface renewal

C.Penetration

D.None of these

Explanation: The correct answer is Film.

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If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor).?

A.Q = Q1 + Q2 + Q3

B.V1 = V2 = V3

C.f = f1 + f2 + f3

D.Q1 = Q2 = Q3

Explanation: The correct answer is Q = Q1 + Q2 + Q3.

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Which of the following is a disaccharide?

A.Starch

B.Glucose

C.Sucrose

D.Maltose

Explanation: The correct answer is Sucrose.

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