CHEMICAL CLEANING MAINTENANCE OF BATHS - Practice Mode

1) What are the chemical contains in electrolyte used for dull nickel plating?

Nickel chloride, Boric acid and Ammonium sulphate Boric acid, Nickel sulphate and Ammonium chloride Dilute sulphuric acid, Hydro chloric acid and Boric acid Nickel sulphate, Sulphuric acid and Hydrochloride

Correct Answer: Nickel chloride, Boric acid and Ammonium sulphate

2) What is the range of pH value is to be maintained for nickel plating solution?

2.5 to 3.0 3.2 to 4.2 3.6 to 4.2 4.5 to 5.0

Correct Answer: 3.6 to 4.2

3) Which metal is used to remove the organic impurities from nickel plating solution?

Silver Carbon Nichrome Chromium

Correct Answer: Carbon

4) What is the name of the defect occurs due to excessive current density?

Imperfect adhesion Rough and dark deposit Black (or) dark plating Pitting of deposit

Correct Answer: Rough and dark deposit

5) Which metal, the nickel deposit can be removed by electrolytic process?

Zinc base alloys Copper base alloys Chromium base alloys Silver base alloys

Correct Answer: Copper base alloys

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