201A Flashcards
(30 cards)
which term describes the voltage output of the machine while you are welding?
A. arc rectification
B. arc blow
C. arc voltage
D. inductance
C. arc voltage
what do you create when current flows though a coil wrapped around an iron core?
A. a magnetic field
B. reverse polarity
C. a transfer rectifier
D. a duty cycle
A. a magnetic field
manufactures design this device in a welding machine to have a certain number of turns of wire.
A. circuit
B. core
C. coil
D. cycle
C. coil
the main function of which device is to change AC to DC?
A. resistor
B. rectifier
C. relay
D. reactor
B. rectifier
which term describes the NEMA rating of a welding machine?
A. duty cycle
B. direct current
C. arc voltage
D. amperage
A. duty cycle
which term describes the influence that magnetic fields exerts on neighboring bodies without physical contact?
A. voltage
B. amperage
C. frequency
D. inductance
D. inductance
electrode negative is:
A. straight polarity
B. reverse polarity
C. AC transformer
D. alternating current
A. straight polarity
which term describes a noisy, uncontrollable arc that that flairs from side to side?
A. Arc voltage
B. arc blow
C. inductance
D. resistance
B. arc blow
which term describes a medium that provides an electrical path through which current can flow?
A. cycle
B. circuit
C. conductor
D. core
C. conductor
which current flows in one direction only and has either a positive or negative value?
A. direct current
B. alternating current
C. open circuit voltage
D. arc voltage
A. direct current
which of the following is a graphical illustration that plots the relationship between voltage and amperage output of a welding power source?
A. open circuit voltage
B. electromotive force
C. volt-amp curve
D. duty cycle
C. volt-amp curve
which term expresses the strength of a current of electricity?
A. amperage
B. voltage
C. electron
D. conductor
A. amperage
when no current is flowing in the circuit, but the machine is on, you can measure the:
A. constant current
B. open circuit voltage
C. alternating current
D. volt-amp curve
B. open circuit voltage
The speed at which AC changes direction is the:
A. Voltage
B. Amperage
C. Frequency
D. Resistance
C. Frequency
in welding, what do you create when enough amperage and voltage exists to
overcome the natural resistance to the flow of the electricity?
A. Amp
B. Volt
C. Cycle
D. Arc
D. Arc
