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Question

Which waves are used for welding plastics?

A
Ultrasonic
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B
Iinfrasonic
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C
Audible
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D
none
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Solution

The correct option is A Ultrasonic
Ultrasonic waves are used for will wielding plastics. Two plastic surfaces are Pressed against each other then ultrasonic waves are allowed to fall at a point where plastic surfaces are in contact.

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