WELDING TECHNIQUES - Practice Mode

1) What is the conversion function of a rectifier?

AC to AC DC to DC AC to DC DC to AC

Correct Answer: AC to DC

2) Which arc length produces correct fusion?

Long arc length Short arc length Normal arc length Too long arc length

Correct Answer: Normal arc length

3) Which type of polarity is used in welding non ferrous metals?

AC Transformer Reverse polarity Straight polarity DC Motor generator

Correct Answer: Reverse polarity

Explanation:

Alpha is the current amplification factor in common base configuration.

4) Which is used for arc welding if there is no electric power supply?

Rectifier set Transformer set Motor generator set Engine generator set

Correct Answer: Engine generator set

5) What is the angle of electrode while welding in vertical position?

60 Degree to 70 Degree 70 Degree to 80 Degree 80 Degree to 90 Degree 90 Degree to 100 Degree

Correct Answer: 80 Degree to 90 Degree

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