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Multiple Choice Question (MCQ) of Battery page-15


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141. For nickel plating the electrolyte consists of

A) double sulphate of nickel and ammonium
B) double cyanide of potassium and silver solution
C) cupronickel sulphate
D) any of the above.

Ans : (A)

142. Electrolyte for silver plating is

A) double cyanide of silver and potassium solution
B) potassium nitrate solution
C) dilute sulphuric acid
D) any of the above.

Ans : (A)

143. For zinc plating the anode current density is usually

A) 0.5 to 1 A/dm2
B) 2 to 4 A/dm2
C) 5 to 10 A/dm2
D) 10 to 20 A/dm2.

Ans : (B)

144. In zinc plating the rate of deposit per minute at 4 A/dm2 will be nearly

A) 80 mm
B) 0.8 mm
C) 80 microns
D) 0.8 microns.

Ans : (D)

145. Out of the following which one will have the highest anode current density?

A) Zinc plating
B) Cadmium plating
C) Silver plating.

Ans : (A)

146. For cadmium plating cathode current density is usually restricted to

A) 25 amperes/dm2
B) 10 to 15 amperes/dm2
C) 5 to 10 amperes/dm2
D) 1 to 3 amperes/dm2.

Ans : (D)

147. When cells are connected in parallel grouping, then

A) EMF decreases
B) EMF increases
C) Current capacity increases
D) Current-capacity decreases.

Ans : (C)

148. To keep the terminals of a lead acid storage battery free from corrosion, it is advisable to

A) charge the battery at frequent intervals
B) keep the electrolyte level low
C) drill holes on the terminal top
D) apply petroleum jelly.

Ans : (D)

149. The plates of lead acid storage battery are most likely to be short circuited if

A) the electrolyte evaporates
B) sediments collect at the bottom of the battery
C) too much water is added
D) the battery is charged too slowly.

Ans : (B)

150. The greater the internal resistance of a cell

A) the lesser the terminal voltage
B) the lesser the emf
C) the greater the emf
D) the greater the terminal voltage.

Ans : (A)


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