E-PolyLearning

36. Speisses is a mixture of the following:
a. Arsenides of heavy metals.
b. Antimonides of heavy metals.
c. Arsenides & antimonides of heavy metals.
d. Iron, cobalt and nickel.
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Answer: (a).Arsenides of heavy metals.

37. Auto collimator is used to check
a. flatness
b. angle
c. rotor balancing
d. roughness
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Answer: (b).angle

38. Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience.
a. yield strength
b. elastic limit
c. proportional limit
d. maximum point
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Answer: (c).proportional limit

39. __________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.
a. Beryllia
b. Zirconia
c. Alumina
d. Magnesia
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Answer: (c).Alumina

40. Titanium alloys are welded using the Following process:
a. TIG welding.
b. Submerged arc welding.
c. Butt welding.
d. Electron beam welding.
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Answer: (a).TIG welding.