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Multiple Choice Question (MCQ) of Battery page-18


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171. Lowest current density is generally recommended for plating of

A) chromium
B) silver
C) bronze
D) cadmium.

Ans : (B)

172. Which of the following substance when added to electrolyte promotes smooth deposition?

A) Glucose
B) Albumen
C) Gelatine
D) Any of above.

Ans : (D)

173. Zinc cadmium and lead coating is generally provided for

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

Ans : (A)

174. Coating generally recommended for hard surfacing is

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

Ans : (C)

175. Galvanizing is the coating of

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

Ans : (D)

176. Aluminium is produced from bauxite by

A) electrolytic process
B) oxidation
C) rotating
D) froth flotation.

Ans : (A)

177. Which of the following is invariably seen in an electroplating plant?

A) Distilled water
B) Rectifier
C) Barrel
D) Carbon brushes.

Ans : (B)

178. For cadmium plating electrolyte used is

A) sodium cyanide, cadmium, and caustic soda
B) cadmium hexa metaphosphate
C) cadmium sulphate and sulphuric acid
D) any of above.

Ans : (A)

179. Electrolyte for silver plating is

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

Ans : (C)

180. Highest purity copper is obtained by

A) smelting
B) roasting
C) electroplating
D) any of the above processes.

Ans (C)


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