2

Question 0

Electrical current

Answer 0

Amperage

Question 1

Electrical pressure

Answer 1

Volts

Question 2

Ohm’s law

Answer 2

E = I X R
I  = E % R
R = E % I

E = voltage
I = current in amps
R = resistance in ohms

Question 3

Total electrical power is measured in

Answer 3

Watts

W = A X V

Question 4

Transformer

Answer 4

Step down electrical power to safe and useable for welding

Question 5

Rectifiers

Answer 5

Turns AC to DC

Question 6

Inverters

Answer 6

Turns DC to AC

Question 7

Alternating current

Answer 7

Goes from zero to max volts at one pole than zero to max volts at the other pole called a “cycle” measured in herts

Question 8

Signal-phase

Answer 8

During one cycle there is a considerable period of time when less than max power is being delivered

Question 9

Three-phase AC

Answer 9

Three single-phases currents time to start at regular intervals

Question 10

Direct Current

Answer 10

The electrons in a current flow steadily in one direction ONLY

Question 11

Arc blow or magnetic arc blow

Answer 11

A condition that can occur when using DC welding current creates a magnetic field that pushes the arc to one side or along the length of the weld

Question 12

Volt-ampere curve

Answer 12

The relationship between the voltage and the current (amps) produced by a welding power source

Question 13

Duty cycle

Answer 13

Is the length of time a welding power source can be used continuously at its rated capacity during any 10 minute period