Index

SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generatorsMCQ-Control-SystemMCQ-Measurementsmcq-of-Generation-power-systemMCQ-of-Induction-MotorMCQ-of-Transmission-DistributionMCQ-of-Electrical-MachinesMCQ-of-Alternator-and-Synchronous-MotorsMCQ-Electric-PowerMCQ-Illumination

Multiple Choice Question (MCQ) of Materials page-20


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191. Which of the following is expected to be strongest in tension?

A) A stainless steel wire
B) An aluminium wire
C) A pianol wire
D) A brass wire.

Ans : (C)

192. Which of the following semi-conductor has highest melting point?

A) Lead sulphide
B) Gallium arsenide
C) Silicon
D) Germanium.

Ans : (C)

193. Which of the following is not the characteristics of glass

A) Slow aging
B) High dielectric loss
C) High chemical resistance
D) Brittle and hard.

Ans : (B)

194. Teflon is prepared by catalytic polymerization of

A) tetrafluorethlene
B) tetrahydrochloride
C) amines
D) alcohol.

Ans : (A)

195. Which of the following material is preferred for transformer cores operating in micro wave range ?

A) Copper
B) Ferrite
C) Silicon steel
D) Supermalloy.

Ans : (B)

196. Which of the following method can not be used for thermoplastic materials?

A) Injection moulding
B) Blow moulding
C) Extrusion
D) All of the above.

Ans : (B)

197. Polystrene at room temperature is

A) soft
B) ductile
C) malleable
D) brittle.

Ans : (D)

198. Thermosetting polymers are

A) cast moulded
B) extruded
C) injection moulded
D) none of the above.

Ans : (A)

199. Which of the following material can be used at temperatures above 100oC?

A) Paraffin wax
B) Rubber
C) Teflon
D) Polythene.

Ans : (C)

200. The crystal structure of most of the common metals is

A) linear
B) orthorhombic
C) cubic
D) hexagonal.

Ans : (C)


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