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-26


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251. Specific gravity of iron is 7.8 Specific gravity of ferrite is

A) 4.3
B) 7.7
C) 7.8
D) 11.8.

Ans : (A)

252. Dielectric loss due to conductivity least depends on

A) temperature
B) frequency
C) surface area
D) voltage.

Ans : (B)

253. Ferrites are

A) materials with all above properties
B) not easily machinable
C) brittle materials
D) hard materials.

Ans : (A)

254. Dielectric loss due to polarization occurs in

A) liquid dielectric
B) non-metallic dielectrics
C) bipolar dielectrics
D) all of the above.

Ans : (C)

255. Loss in a dielectric may occur due to

A) ionization
B) conductivity
C) polarization
D) any of the above.

Ans : (D)

256. Breakdown in dielectric may be

A) electrical breakdown
B) thermal breakdown
C) electrochemical breakdown
D) any of the above.

Ans : (D)

257. Tin-cadmium-zinc solder is preferred for

A) copper and its alloys
B) aluminium and its alloys
C) platinum and tungsten
D) steel.

Ans : (B)

258. Which of the following dielectric is insoluble in water?

A) Ceramics
B) Polystyrene
C) Paraffin
D) All of the above.

Ans : (D)

259. Rutile is

A) most common phase of TiO2
B) a polymeric material
C) a discrete unit of energy
D) crystal with three equal axes not at right angles.

Ans : (A)

260. On Moh,s scale, the hardness of quartz is recognized as

A) 3
B) 4
C) 7
D) 10.

Ans : (C)


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