Q.

Which of the following is not used as a flame heating source in fusion splicing?

A. microprocessor torches
B. ox hydric burners
C. electric arc
D. gas burner
Answer» D. gas burner
Explanation: micro-plasma torches uses argon and hydrogen and alcohol vapor. the most widely used heating source is an electric arc. thus, gas burner is not used in fusion splicing.
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