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Electroplater
Electroplater Set-1
PCB making and Chemical etching process
37

PCB making and Chemical etching process MCQ with Answers

37) What is the pH value of conversion coating solution?

2

1

4

3

Answer is:

2

PCB making and Chemical etching process MCQ with Answers

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Related PCB making and Chemical etching process MCQ with Answers

38) Which is the processing step of chemical milling?

Stopping OFF

Swilling OFF

Dipping OFF

Degreasing OFF

Answer is:

Stopping OFF

39) Which type of passivation is used on stainless steel?

Brown and Black

Red and Green

Yellow and Blue

Red and Black

Answer is:

Yellow and Blue

40) Which process is used before passivation?

Zinc and Cadmium plating

Nickel chrome plating

Powder coating

Phosphating

Answer is:

Zinc and Cadmium plating

41) Which is the chemical formula of phosphoric acid?

P₃ HO4

H₃ PO4

O₃ HP4

P4 HO₃

Answer is:

H₃ PO4

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