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-33


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321. Which of the following is a thermosetting plastic?

A) Cellulose
B) Polypropylene
C) Polyethylene
D) Diallyphthalate.

Ans : (D)

322. Inert filler carbon resistors is

A) alumina
B) silica
C) a resin
D) graphite.

Ans : (A)

323. The melting point of carbon is around

A) 1800o C
B) 2150o C
C) 3500o C
D) 5500o C.

Ans : (C)

324. In hardness test by Brinell hardness tester, the hardness of ball is of the order of

A) 100 BHN
B) 100 VPN
C) 850 VHN
D) 1000 BHN.

Ans : (C)

325. Due to the formation of Schotty defects, the density of the crystal

A) decreases appreciably
B) decreases slightly
C) increases appreciably
D) increases slightly.

Ans : (B)

326. Resistivity of carbon is around

A) 10 to 70 u-ohm-cm
B) 80 to 130 u-ohm-cm
C) 800 to 1300 u-ohm-cm
D) 8000 to 13000 u-ohm-cm.

Ans : (C)

327. A ductile fracture is usually not preceded by

A) large amount of non-recoverable energy absorption
B) plastic flow
C) deformation
D) noise.

Ans : (D)

328. Gel is

A) A polymer in which the repeating unit of each molecule has vinyl group
B) A solid framework of colloidal particles linked together and containing a fluid in its interstices
C) A polymer having secondary chains branching from the main molecular chains
D) a polymer having side groups distributed randomly along a vinyl polymer chain.

Ans : (B)

329. The imaginary part of dielectric constant determines

A) component of current which is in phase with the applied field
B) amount of applied field
C) component of energy absorbed per
D) component of voltage which is in phase with the applied field.

Ans : (C)

330. If the magnetic susceptibility of a specimen is small and positive, the specimen is

A) non-magnetic
B) ferromagnetic
C) paramagnetic
D) diamagnetic.

Ans : (C)


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