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Electroplater
GOLD PLATING
Set 6
Set 6
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Q5237
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Which is the atomic number of tin?
A
30
B
50
C
25
D
20
Q5238
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Which material, Tin coating is used for corrosion resistance?
A
Steel
B
Gold
C
Aluminium
D
Silver
Q5239
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Which is the current density for acid bath?
A
2.0 to 2.5 A/dm<sup>2</sup>
B
1.0 to 2 A/dm<sup>2</sup>
C
5.0 to 5.5 A/dm<sup>2</sup>
D
9.0 to 9.5 A/dm<sup>2</sup>
Q5240
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Which is the chemical symbol of tin?
A
Sb
B
Sn
C
Se
D
Sa
Q5241
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Which is prevented by tin coating?
A
Rust formation
B
Hardness
C
Brittleness
D
Heat exposure
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