Which of the following metals must be tested with low halogen sulphur – McqOptions

MCQOPTIONS

1.	Which of the following metals must be tested with low halogen sulphur free penetrant materials:
A.	Copper, silver, gold
B.	Nickel based alloys, certain stainless steel materials
C.	Steel, iron, aluminium
D.	Plastic, wood, paper
Answer» E.

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