chemical engineering MCQs – Page 306

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

6101. Ganister is a source of the ________________?
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A. None of these

B. Lime

C. Periclase

D. Silica

6102. Which law/principle of solid mechanics is similar/equivalent to Newtons law of viscosity in fluid mechanics ?
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A. Hookes law

B. Archimedes principle

C. Newtons third law of motion

D. Newtons second law of motion

6103. Stokes law is valid, when the particle Reynolds number is ______________________?
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A. < 5

B. None of these

C. > 1

D. < 1

6104. Select the correct practical example of steady non-uniform flow?
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A. Steadily increasing flow through a pipe

B. Motion of water around a ship in a lake

C. Steadily decreasing flow through a reducing section

D. Motion of river around bridge piers

6105. Which of the following is used for very accurate measurement of flow of gas at low velocity ?
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A. Rotameter

B. Segmental orificemeter

C. Pitot tube

D. Hot wire anemometer

6106. Toothpaste is a__________________?
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A. Bingham plastic

B. Dilatent

C. Pseudo-plastic

D. Newtonian liquid

6107. Prandtl mixing length is___________________?
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A. Applicable to laminar flow problems

B. None of these

C. Zero at the pipe wall

D. A universal constant

6108. With increasing alumina content, the fusion point of high alumina refractories__________________?
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A. May increase or decrease; depends on its alumina content

B. Increases

C. Decreases

D. Remain constant

6109. Which of the following can be used to create a flow of gas, where no significant compression is required ?
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A. Axial flow compressor

B. Centrifugal compressor

C. Blower

D. Reciprocating compressor

6110. In case of end to end connection of two or more pipes in series, the ______________ each pipe?
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A. Rate of flow in each pipe is proportional to the length of

B. Total flow rate is the sum of flow rate in

C. Head loss is same through

D. Same rate of flow passes through

6111. The maximum discharge through a circular channel takes place, when the depth of the fluid flow is ______________ times the pipe diameter?
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A. 0.95

B. 0.66

C. 0.5

D. 0.25

6112. Addition of zircon to silica refractory brick improves its_____________________?
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A. Crushing strength

B. Resistance to slag attack

C. Both A. and B.

D. Neither A. nor B.

6113. When the water is warm, the height to which it can be lifted by a pump_________________?
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A. Decreases due to increased frictional resistance

B. Decreases due to reduced viscosity

C. Decreases due to reduced vapour pressure

D. Increases due to increased vapour pressure

6114. Maximum safe working temperature for fireclay bricks is about __________ C?
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A. 1300

B. 1450

C. 1550

D. 1150

6115. Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________?
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A. Segar cones

B. Crucibles used for melting of high purity metals

C. Insulating bricks

D. Muffles for muffle furnaces

6116. The ratio of inertial forces to viscous forces is called the ______________ number?
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A. Froude

B. Mach

C. Weber

D. Reynold

6117. Which furnace consumes maximum refractory annually in an integrated steel plant ?
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A. L.D. converter

B. Soaking pit

C. Blast furnace

D. Coke ovens

6118. The main raw material for manufacture of silicon carbide refractories is_________________?
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A. Corundum

B. Carborundum

C. Periclase

D. Bauxite

6119. Power required by a centrifugal pump is proportional to (where, D = diameter, N = r.p.m) ________________?
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A. N3D5

B. N2D

C. N2D3

D. ND2

6120. Purpose of air lift pump is to____________________?
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A. Lift water from a well by using compressed air

B. Lift compressed air

C. Lift air under negative pressure

D. Compress air

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