CWB Level 2 Module 5 Power Sources
for Welding CORRECT QUESTIONS &
ANSWERS(RATED A+)
Guide Question - Section 2
"Electric current is readily conducted in metals (low resistance) because of the many
free electrons"
True or false - ANSWERTrue
Guide Question - Section 2
"Conventional current flow is from negative to positive"
True or False - ANSWERFalse
Guide Question - Section 2
Materials that have a high resistance to current flow are called:
a) Semi conductors
b) conductors
c) insulators - ANSWERc) insulators
Guide Question - Section 2
"A gas can only conduct electricity when the gas has been ionized (a plasma has
formed)"
True or False - ANSWERTrue
Guide Question - Section 2
The 3 major components of a welding arc are:
a) anode, cathode and plasma
b) nozzle, gas and electrode
c) work piece, gas and weld metal - ANSWERa) anode, cathode and plasma
Guide Question - Section 2
"Gas tungsten arc welding incorporates a consumable electrode"
True or False - ANSWERFalse
Guide Question - Section 2
Transformer-based welding power sources are typically connected to:
a) engine driven generator
, b) utility supply power - ANSWERb) utility supply power
Guide Question - Section 2
"To initiate an arc required high current and low voltage power
True or False - ANSWERFalse
Guide Question - Section 2
For a consumable electrode welding process the majority of the heat in DCEN
polarity is concentrated on the:
a) electrode
b) workpiece - ANSWERa) electrode
Guide Question - Section 2
For a non-consumable electrode welding process the majority of the heat in DCEN
polarity is concentrated on the:
a) electrode
b) workpiece - ANSWERb) workpiece
Guide Question - Section 2
"Ohm's law applies to a welding arc since current increases as voltage increases"
True or False - ANSWERFalse
Guide Question - Section 2
The shielded metal arc welding process requires a power source that produces
constant
a) voltage
b) current - ANSWERb) current
Guide Question - Section 2
The voltage drop across the arc region includes:
a) contact tip, welding cables and work clamp
b) anode, cathode, and plasma
c) electrode coating, electrode holder and electrode - ANSWERb) anode, cathode,
and plasma
Guide Question - Section 2
"In a series circuit current may be accurately measured at any point because there is
only a single path for current to flow
for Welding CORRECT QUESTIONS &
ANSWERS(RATED A+)
Guide Question - Section 2
"Electric current is readily conducted in metals (low resistance) because of the many
free electrons"
True or false - ANSWERTrue
Guide Question - Section 2
"Conventional current flow is from negative to positive"
True or False - ANSWERFalse
Guide Question - Section 2
Materials that have a high resistance to current flow are called:
a) Semi conductors
b) conductors
c) insulators - ANSWERc) insulators
Guide Question - Section 2
"A gas can only conduct electricity when the gas has been ionized (a plasma has
formed)"
True or False - ANSWERTrue
Guide Question - Section 2
The 3 major components of a welding arc are:
a) anode, cathode and plasma
b) nozzle, gas and electrode
c) work piece, gas and weld metal - ANSWERa) anode, cathode and plasma
Guide Question - Section 2
"Gas tungsten arc welding incorporates a consumable electrode"
True or False - ANSWERFalse
Guide Question - Section 2
Transformer-based welding power sources are typically connected to:
a) engine driven generator
, b) utility supply power - ANSWERb) utility supply power
Guide Question - Section 2
"To initiate an arc required high current and low voltage power
True or False - ANSWERFalse
Guide Question - Section 2
For a consumable electrode welding process the majority of the heat in DCEN
polarity is concentrated on the:
a) electrode
b) workpiece - ANSWERa) electrode
Guide Question - Section 2
For a non-consumable electrode welding process the majority of the heat in DCEN
polarity is concentrated on the:
a) electrode
b) workpiece - ANSWERb) workpiece
Guide Question - Section 2
"Ohm's law applies to a welding arc since current increases as voltage increases"
True or False - ANSWERFalse
Guide Question - Section 2
The shielded metal arc welding process requires a power source that produces
constant
a) voltage
b) current - ANSWERb) current
Guide Question - Section 2
The voltage drop across the arc region includes:
a) contact tip, welding cables and work clamp
b) anode, cathode, and plasma
c) electrode coating, electrode holder and electrode - ANSWERb) anode, cathode,
and plasma
Guide Question - Section 2
"In a series circuit current may be accurately measured at any point because there is
only a single path for current to flow
