[Solved] Pre cleaning is done on the work piece surface in order to achieve, which of the following factors?

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Q.	Pre cleaning is done on the work piece surface in order to achieve, which of the following factors?
A.	to provide good adhesion
B.	to provide clean surface
C.	to assure the absence of contaminants
D.	all of the mentioned
Answer» D. all of the mentioned
Explanation: all the factors mentioned above, are achieved thorough pre-cleaning process.

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