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Electroplater
Electroplater Set-1
PCB making and Chemical etching process
31

PCB making and Chemical etching process MCQ with Answers

31) Which solution is used for treatment after colouring?

Nickel acid and Boric acid

Copper oxide and Carbonate

Zinc and Zinc chloride

Hydrochloric acid

Answer is:

Nickel acid and Boric acid

PCB making and Chemical etching process MCQ with Answers

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Related PCB making and Chemical etching process MCQ with Answers

32) Which is the cause if the article surface on dark stain during dyeing?

Dyestuff not soluble

In sufficient dyestuff

Dyestuff not dipping

High dyestuff

Answer is:

Dyestuff not soluble

33) Which process is used to colour film removal?

Coating

Bleaching

Dipping

Brushing

Answer is:

Bleaching

34) Which is the application of conversion coating?

Electronic industry

Automobile industry

Aerospace industry

Shipping industry

Answer is:

Electronic industry

35) Which solution is used for conversion coating?

Chromic acid

Sulphuric acid

Nitric acid

Hydro chloric acid

Answer is:

Chromic acid

PCB making and Chemical etching process MCQ with Answers

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