chemical engineering MCQs – Page 360

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 Review each marked answer and report any item that may be outdated or unclear.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
7181. Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of ______________ as mercury does not amalgamate with it?
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A. Copper alloys

B. Monel

C. Stainless steel

D. Copper

7182. Cold work tool steel should have_________________?
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A. Poor hardenability

B. High toughness

C. High wear resistance

D. All A., B. & C.

7183. A hardened steel essentially contains___________________?
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A. Sorbite

B. Martensite

C. Troostite

D. None of these

7184. Spark plugs, ignition tubes and electrodes are made of nickel ____________ alloys?
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A. Manganese

B. Beryllium

C. Copper

D. Iron

7185. Babbitt metal used for making bearings should have_____________________?
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A. High co-efficient of friction between journal and bearing

B. Ability to retain lubricant on its surface

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

D. Both B. & C.

7186. Liners of a ball mill are never made of__________________?
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A. Cast iron

B. Alloy steel

C. Lead

D. Rubber or ceramic material

7187. Fatigue failure of a material results from _____________ stress?
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A. Fluctuating

B. Tensile

C. Compressive

D. None of these

7188. _____________ is added in low carbon steel to raise its yield point?
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A. Sulphur

B. Manganese

C. Phosphorous

D. Silicon

7189. Hydrocyanic acid is not shipped in______________?
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A. Steel cylinders

B. Cast iron vessels

C. Aluminium containers

D. Monel drums

7190. Age hardening is concerned with_________________?
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A. Duralumin

B. Brass

C. Silver

D. Copper

7191. Diamagnetic materials are magnetised________________?
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A. In a direction opposite to that of the applied field

B. With eddy currents only

C. Only slightly

D. Strongly

7192. Clock pendulums are usually made of _______________ steel?
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A. Heat resisting

B. None of these

C. Stainless

D. High speed

7193. Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of __________________?
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A. Stainless steel

B. Nickel

C. Brass

D. Copper
7194. Which of the following is the softest material ?
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A. Fluorite

B. Corundum

C. Calcite

D. Quartz

7195. Thermosetting resins are those polymers, which__________________?
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A. Do not increase in plasticity with rise in temperature

B. None of these

C. Allow slip to occur between molecules

D. Do not take on a permanent set

7196. A material capable of undergoing large permanent deformation, when subjected to tension is termed as___________________?
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A. Friable

B. Ductile

C. None of these

D. Brittle

7197. Purity of electrical grade aluminium should be ? _____________ percent?
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A. 85

B. 90

C. 95

D. 99.5
7198. The digester of a Gobar gas plant is a___________________?
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A. Stainless steel vessel

B. Mild steel drum

C. Masonry well

D. Cast iron vessel

7199. For platinum thermocouples, lead wires are made of___________________?
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A. Tin & nickel

B. Copper & iron

C. Iron & nickel

D. Copper & copper-nickel alloys
7200. Low carbon steels are those in which carbon percentage is around____________________?
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A. 0.8 to 1.5

B. 1.5 to 2

C. 0.1 to 0.35

D. 0.4 to 0.7