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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-Motors

Multiple Choice Question (MCQ) of Battery page-13


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121. Coating generally recommended for hard surfacing is generally

A) chromium plating
B) copper plating
C) lead plating
D) none of the above.

Ans : (A)

122. Galvanizing is the coating of

A) zinc
B) brass
C) chromium
D) lead.

Ans : (A)

123. Which coating is usually recommended for reflectors?

A) Cadmium coating
B) Lead coating
C) Rhodium coating
D) Brass coating.

Ans : (C)

124. Coating usually recommended for electrical contacts is that of

A) gold
B) tin
C) silver
D) chromium.

Ans : (C)

125. Recommended coating for food containers is

A) tin
B) brass
C) cadmium
D) zinc.

Ans : (A)

126. Zinc cadmium and lead coating is generally provided for

A) decoration
B) electrical contacts
C) corrosion
D) all of the above.

Ans : (C)

127. Energy efficiency during electroplating is usually in the range

A) 50 to 80 %
B) 80 to 95 %
C) 80 to 85 %
D) 90 to 99 %.

Ans : (A)

128. Current efficiency in electroplating is usually

A) 99 %
B) 90 to 98 percent
C) 70 to 80 %
D) 50 to 60 percent.

Ans : (B)

129. Electro-chemical equivalent is usually expressed in

A) milligrams per volt
B) milligrams per kW
C) milligrams per kVA
D) milligrams per coulomb.

Ans : (D)

130. During electroplating, the amounts of different substances liberated by same quantity of electricity are proportional to their

A) atomic weights
B) atomic numbers
C) chemical equivalents
D) valency.

Ans : (C)


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