29) Which type heater is suitable for acid copper solution?

Steel case electric immersion heater

Silica case heater

Lead line heater

Glass line immersion heater

Answer is:

Steel case electric immersion heater

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30) What is rochelle copper salt?

Cyanide copper salt

Acid copper salt

Usex copper salt

Copper fluaborak salt

Answer is:

Acid copper salt

Explanation:

Rochelle salt is used in the cyanide copper plating bath to aid in anode corrosion and tends to give a denser, smoother deposit. Rochelle copper salt is a Acid copper salt.

31) Which cyanide salt is used for copper plating?

Acid copper salt

Rochelle copper salt

Usex copper salt

Copper fluo salt

Answer is:

Usex copper salt

32) Which type solution is used for copper plating removal by immersion method?

Chromic acid and Sulphuric acid

Nitric acid and Hydrochloric acid

Fier salt and Hydrochronic acid

Hydro fluoric acid and Cyanide solution

Answer is:

Chromic acid and Sulphuric acid

33) Which is the property of nickel?

Rapid soluble in hydrochloride

High mechanical strength

Dilute sulphuric acid attacks nickel

Low mechanical strength

Answer is:

High mechanical strength

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