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-8


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71. The property of material by which it can be rolled into sheets is called

A) Ductility
B) Malleability
C) Elasticity
D) Plasticity.

Ans : (B)

72. Porous materials generally

A) create sound
B) transmit sound
C) reflect entire sound
D) absorb most of the sound.

Ans : (D)

73. Acoustical materials

A) deflect sound
B) create sound
C) absorb sound
D) reflect sound.

Ans : (C)

74. Silicon doped with gallium is

A) n-type semi-conductor
B) p-type semi-conductor
C) extrinsic semi-conductor
D) intrinsic semi-conductor.

Ans : (B)

75. Silicon doped with phosphorous is a

A) n-type semi-conductor
B) p-type semi-conductor
C) extrinsic semi-conductor
D) intrinsic semi-conductor.

Ans : (A)

76. Selenium is

A) p-type semi-conductor
B) n-type semi-conductor
C) extrinsic semi-conductor
D) intrinsic semi-conductor.

Ans : (D)

77. Which of the following is a semi-conductor material ?

A) Phosphorous
B) Silicon
C) Rubber
D) Aluminium.

Ans : (B)

78. Which method is suitable for the measurement of resistivity of good conductors of electricity?

A) Loss of charge method
B) Schering bridge method
C) Kelvin double bridge method
D) Any of the above.

Ans : (C)

79. A material with unequal anti-parallel atomic magnetic moments is

A) non-magnetic
B) a ferrite
C) ferrimagnet
D) an anti-ferromagnet.

Ans : (D)

80. Babbit is an alloy of

A) tin, antimony and copper
B) tin, zinc and aluminium
C) tin, nickel and zinc
D) tin, nickel and zinc.

Ans : (A)


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