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Electroplater
HARD CHROMIUM PLATING
Set 4
Set 4
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Q5287
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Which is the name of process that cleaning the metal in acid to remove corrosion products from the surface?
A
Pickling
B
De-scaling
C
Drying
D
Deburring
Q5288
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Which is the equivalent weight of oxalic acid crystals?
A
53
B
58
C
61
D
63
Q5289
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Which acid is used for pickling and etching of metal?
A
Sulphuric acid
B
Boric acid
C
Phosphoric acid
D
Phosphorus acid
Q5290
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Which chemical is used for vapour degreasing?
A
Trichloroethylene
B
Sodium carbonate
C
Trisodium phosphate
D
Sodium hydroxide
Q5291
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Which solution is used for alkaline cleaning?
A
Sodium carbonate
B
Trichloroethylene
C
Ammonium citrate
D
Sodium chloride
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