E-PolyLearning

26. If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.
a. critical
b. breeder
c. fertile
d. heterogenous
View Answer Report Discuss 50-50!
Answer: (b).breeder

27. Wrought iron is never shaped by
a. casting
b. cold working
c. forging
d. welding
View Answer Report Discuss 50-50!
Answer: (a).casting

28. Which one of the following is incombustible ?
a. H₂
b. CCl₄
c. C₂H₂
d. S
View Answer Report Discuss 50-50!
Answer: (b).CCl₄

29. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.
a. hard
b. soft
c. silicon carbide
d. aluminium oxide
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Answer: (d).aluminium oxide

30. Tin based white metals are used, where bearings are subjected to
a. high pressure & load.
b. low pressure & load.
c. high temperature.
d. large surface wear.
View Answer Report Discuss 50-50!
Answer: (a).high pressure & load.

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