chemical engineering chemical engineering basics MCQs – Page 35

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical engineering basics Mcqs
681. Which of the following metals is not subjected to electrolytic refining/purification ?
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A. Aluminium

B. Tin

C. Zinc

D. Copper

682. Steel & cast iron pipes are produced by ______________ casting ?
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A. Investment

B. True centrifugal

C. Die

D. Slush

683. Pick out the wrong statement ?
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A. Most of the hydrocarbons are non-polar

B. Molecules with symmetrical arrangements (e.g. CH4 or CCl4) are non-polar

C. None of these

D. Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do

E. ionise

684. Nickel is a _________________ material?
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A. Ferroelectric

B. Ferromagnetic

C. Paramagnetic

D. Semi-conductor

685. The swift cup test evaluates the following property of a sheet metal ?
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A. Bendability

B. None of these

C. Stretchability

D. Drawability
686. An approximately _____________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section ?
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A. Isothermal

B. Isochoric

C. Isentropic

D. Adiabatic

687. Starting friction is low in case of the ____________________ lubrication?
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A. Mixed/semi-fluid

B. Hydrostatic

C. Boundary

D. Hydrodynamic

688. _________________ furnace is generally used in the non-ferrous foundries ?
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A. Resistance

B. Indirect arc

C. Direct arc

D. Induction

689. Solute atoms which cause yield point phenomenon in mild steel are/is_________________?
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A. Carbon

B. Aluminium

C. Boron

D. Nitrogen

690. The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the _______________ allowance ?
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A. Draft

B. Casting

C. Distortion

D. Pattern

691. Insulation of liquid surface can be achieved by _____________ on top of its surface?
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A. Putting cement

B. Spraying alumina powder

C. Floating hollow polypropylene spheres

D. None of these

692. Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50% B is_______________?
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A. -R ln 2

B. -3R ln 2

C. R ln 2

D. 3 R ln 2

693. The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their__________________?
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A. Equivalent weight

B. (Molecular weight)2

C. Molecular weight

D. (Equivalent weight)2

694. In a forced draft cooling tower, water is cooled from 95 to 80F by exposure to air with a wet bulb temperature of 70F. In this case, the________________?
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A. Range is 15F

B. Approach is 10F

C. Both A. & B.

D. Neither A. nor B.

695. Thermit welding is categorised as the ______________________ welding ?
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A. Forge

B. Arc

C. Fusion

D. Resistance

696. Maximum change in the hardness of martensite occurs in the carbon content range of _____________ percent in steel?
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A. 0.5 to 0.7

B. 0.2 to 0.4

C. 0.01 to 0.10

D. 0.8 to 1.0

697. In a totally irreversible isothermal expansion process for an ideal gas, ?E = 0, ?H = 0. Then ?Q and ?S will be_______________?
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A. ?Q = 0, ?S = +ve

B. ?Q = 0, ?S=0

C. ?Q = +ve, ?S= +ve

D. ?Q = 0, ?S = -ve

698. In a good rimming steel_________________________?
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A. Carbon and silicon should be low

B. Silicon should be low but carbon should be high

C. Both silicon & carbon should be high

D. Silicon should be high but carbon should be low

699. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
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A. Cutlery, screws, rivets and files

B. Mandrels, twist drills, small lathe tools and razors

C. Forgings like can shaft, structural steel plate, threading dies and drawing dies

D. Small punches, broaches reamers and springs
700. In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of_________________?
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A. High carbon steel

B. High speed steel

C. Mild steel

D. Stainless steel