AGM 2050 Test 2 QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTION
2026-2027 ALREADY GRADED A+
What happens when the end of the electrode is brought close to the
base metal in arc welding? - ANSWERS-current jumps across the small
gap and creates the electrical arc
What happens when the arc is formed in arc welding? - ANSWERS-
intense heating melts the end of the electrode and the base metal and
produces molten puddle on the base metal
What is the molten puddle on the base metal called? - ANSWERS-the
crater
What is the result of arc welding? - ANSWERS-2 pieces of metal that
are fused into one solid piece
What do slag and flux do in arc welding? - ANSWERS-help control the
arc length
What does slag do in arc welding? - ANSWERS-try to keep impurities
out of weld during cooling; gaseous cloud settles on the metal;
controls the rate of cooling, slows the cooling process
,What is the point of the gaseous cloud in arc welding? - ANSWERS-goal
is to keep air we breathe out of the weld; everything in the air is an
impurity for welding
What is the primary power concept for arc welding? What's included? -
ANSWERS-input or supply source; includes voltage (volts), current
draw (amps), AC power phase (single or 3-phase)
What is the secondary power concept for arc welding? What's
included? - ANSWERS-output at electrode; includes voltage (volts),
rated output load (amps), duty cycle, Max OCV
What is the duty cycle? - ANSWERS-% operation out of 10 minutes at
full load
What does arc welding cover? - ANSWERS-All forms of electrical
welding; MIG, TIG, Stick
What does SMAW stand for? - ANSWERS-shielded Metal arc welding
Arc welding also known as - ANSWERS-SMAW, stick welding, covered
electrode welding
What is arc welding? - ANSWERS-process of fusing metal with heat
that is created by an electrical arc
,What is the arc in arc welding? - ANSWERS-the current that travels
from the electrode to the base metal
How is the electrical current produced in arc welding? - ANSWERS-
produced by an electric welding machine (converts low current/high
voltage to high current/low voltage)
What does the power supply of an SMAW machine need to be for heavy
things? - ANSWERS-240 amps
What power do we weld at? - ANSWERS-120-130 amps
when do you have incomplete fusion? - ANSWERS-if you move too fast,
heat dissipates in one direction on one piece and melts really fast, the
bottom piece, heat dissipates in both directions so it melts much
slower
In order to weld, ensure the metals..... - ANSWERS-have to be similar
with similar melting points
What is Max OCV? - ANSWERS-open circuit volts; higher OCV, easier to
strike arc
What is maximum safe OCV? - ANSWERS-80 volts
, What are the types of output current for arc welding machines? -
ANSWERS-AC (alternating current)
DC (Direct current)
AC/DC (combination)
230 amp, limited input AC arc welder - ANSWERS-may not be enough
juice for some applications, 20% duty cycle; weld 2 mins, cool 8 mins
295 amp, limited input AC arc welder - ANSWERS-most useful for
average shop; 20% duty cycle
200-700 amp, industrial AC arc welder - ANSWERS-60% duty cycle
What are the power sources of DC arc welders? - ANSWERS-AC
current, motor driven generators, motor driven alternators
What is Straight polarity for DC arc welders? - ANSWERS-DC negative,
concentrates heat on work piece; get a deeper and better weld
What is reverse polarity for DC arc welders? - ANSWERS-DC positive,
heat concentrated on electrode; hotter electrode, larger diameter
What are the electrode angle positions for stick welding? - ANSWERS-
60º - downhand, first half electrode
90º - downhand, second half electrode
ANSWERS WITH COMPLETE SOLUTION
2026-2027 ALREADY GRADED A+
What happens when the end of the electrode is brought close to the
base metal in arc welding? - ANSWERS-current jumps across the small
gap and creates the electrical arc
What happens when the arc is formed in arc welding? - ANSWERS-
intense heating melts the end of the electrode and the base metal and
produces molten puddle on the base metal
What is the molten puddle on the base metal called? - ANSWERS-the
crater
What is the result of arc welding? - ANSWERS-2 pieces of metal that
are fused into one solid piece
What do slag and flux do in arc welding? - ANSWERS-help control the
arc length
What does slag do in arc welding? - ANSWERS-try to keep impurities
out of weld during cooling; gaseous cloud settles on the metal;
controls the rate of cooling, slows the cooling process
,What is the point of the gaseous cloud in arc welding? - ANSWERS-goal
is to keep air we breathe out of the weld; everything in the air is an
impurity for welding
What is the primary power concept for arc welding? What's included? -
ANSWERS-input or supply source; includes voltage (volts), current
draw (amps), AC power phase (single or 3-phase)
What is the secondary power concept for arc welding? What's
included? - ANSWERS-output at electrode; includes voltage (volts),
rated output load (amps), duty cycle, Max OCV
What is the duty cycle? - ANSWERS-% operation out of 10 minutes at
full load
What does arc welding cover? - ANSWERS-All forms of electrical
welding; MIG, TIG, Stick
What does SMAW stand for? - ANSWERS-shielded Metal arc welding
Arc welding also known as - ANSWERS-SMAW, stick welding, covered
electrode welding
What is arc welding? - ANSWERS-process of fusing metal with heat
that is created by an electrical arc
,What is the arc in arc welding? - ANSWERS-the current that travels
from the electrode to the base metal
How is the electrical current produced in arc welding? - ANSWERS-
produced by an electric welding machine (converts low current/high
voltage to high current/low voltage)
What does the power supply of an SMAW machine need to be for heavy
things? - ANSWERS-240 amps
What power do we weld at? - ANSWERS-120-130 amps
when do you have incomplete fusion? - ANSWERS-if you move too fast,
heat dissipates in one direction on one piece and melts really fast, the
bottom piece, heat dissipates in both directions so it melts much
slower
In order to weld, ensure the metals..... - ANSWERS-have to be similar
with similar melting points
What is Max OCV? - ANSWERS-open circuit volts; higher OCV, easier to
strike arc
What is maximum safe OCV? - ANSWERS-80 volts
, What are the types of output current for arc welding machines? -
ANSWERS-AC (alternating current)
DC (Direct current)
AC/DC (combination)
230 amp, limited input AC arc welder - ANSWERS-may not be enough
juice for some applications, 20% duty cycle; weld 2 mins, cool 8 mins
295 amp, limited input AC arc welder - ANSWERS-most useful for
average shop; 20% duty cycle
200-700 amp, industrial AC arc welder - ANSWERS-60% duty cycle
What are the power sources of DC arc welders? - ANSWERS-AC
current, motor driven generators, motor driven alternators
What is Straight polarity for DC arc welders? - ANSWERS-DC negative,
concentrates heat on work piece; get a deeper and better weld
What is reverse polarity for DC arc welders? - ANSWERS-DC positive,
heat concentrated on electrode; hotter electrode, larger diameter
What are the electrode angle positions for stick welding? - ANSWERS-
60º - downhand, first half electrode
90º - downhand, second half electrode
