WELDING- RED SEAL PREP QUESTIONS AND
ANSWERS
Define low carbon steel - Answer -Steel with a carbon range of .05-.3% carbon
Define medium carbon steel - Answer -Steel with a carbon range of .3-.45% carbon
What's the rule of thumb for tungsten end prep? - Answer -2.5x E ø
What can excessive spatter and undercut of weld bean be caused by? - Answer -High
current
When using a E4918 electrode and the arc is seen to be pulsing. What is the likely
cause? - Answer -Wrong polarity
What rod should not be stored in a rod oven? - Answer -Cellulosic
MIG welding is almost always in what polarity? - Answer -DCEP
When GMAW welding how is gas control regulated? - Answer -Flowmeter
What does a CC mode require? - Answer -Voltage sensing wire feeder
Which shielding medium is often used for carbon steel short circuit welding? - Answer -
CO2
What is the maximum distance whip for a push type drive system? - Answer -4.5M
15Feet
Which shielding gas may require an in-line heater at high flow rates? - Answer -CO2
What do the letters GS mean in a ER70S-GS electrode? - Answer -Intended for single
pass only
What does the letter C stand for in a ER70C-X electrode? - Answer -Composite filler
metal
What is a normal Electrode extension for a FCAW-S? - Answer -1 1/2 - 2 1/2
What type of drive roller is best suited for FCAW? - Answer -Knurled
There are several types of SAW fluxes. Which one is reusable? - Answer -Fused flux
Which wire feeder set-up is used with SAW aim CC mode? - Answer -Voltage sensing
, Brazing takes place by using a filler metal that becomes liquid at what temperature? -
Answer -450 degrees C
In OFB of is the filler drawn into the joint? - Answer -Capillary action
Which shielding gas is used to purge a copper pipe for brazing? - Answer -Nitrogen
What drawing works off of 30° on both sides of the centreline? - Answer -Isometric
What is the most serious welding defect? - Answer -Cracking
How is the length of a file found? - Answer -Measuring from the tip to the heel
What polarity is mostly used for ACAG? - Answer -DCEP
Why is a smaller tip used rather than turning a torch down when cutting thin materials? -
Answer -To prevent burn back into the torch
If the bottom edge of the OFC is irregular and rough, what is the likely cause? - Answer
-Travel speed to slow
PAC uses what mode of process operation? - Answer -Transferred arc
When must fall protection be employed? - Answer -Heights greater than 10' 3M
What is the max noise for workers to be exposed to? - Answer -85Dba
How far should a ladder extend past a roof ledge? - Answer -3 feet
What's the square reef knot used for? - Answer -Tying 2 ropes of equal diameter
together
If your sling included angle exceeds _______ ° you should use a spreader bar. -
Answer -120
When you hear the popping sound in oxy-fuel, what is happening? - Answer -Back fire
What is more serious flashback or backfire? - Answer -Flashback
What is the critical point of acetylene? - Answer -21°C / 28 PSI it explodes
How far should open a fuel gas cylinder? - Answer -1 1/2-2 turns
What are oxy-fuel fittings and connections made of? - Answer -Brass alloy
ANSWERS
Define low carbon steel - Answer -Steel with a carbon range of .05-.3% carbon
Define medium carbon steel - Answer -Steel with a carbon range of .3-.45% carbon
What's the rule of thumb for tungsten end prep? - Answer -2.5x E ø
What can excessive spatter and undercut of weld bean be caused by? - Answer -High
current
When using a E4918 electrode and the arc is seen to be pulsing. What is the likely
cause? - Answer -Wrong polarity
What rod should not be stored in a rod oven? - Answer -Cellulosic
MIG welding is almost always in what polarity? - Answer -DCEP
When GMAW welding how is gas control regulated? - Answer -Flowmeter
What does a CC mode require? - Answer -Voltage sensing wire feeder
Which shielding medium is often used for carbon steel short circuit welding? - Answer -
CO2
What is the maximum distance whip for a push type drive system? - Answer -4.5M
15Feet
Which shielding gas may require an in-line heater at high flow rates? - Answer -CO2
What do the letters GS mean in a ER70S-GS electrode? - Answer -Intended for single
pass only
What does the letter C stand for in a ER70C-X electrode? - Answer -Composite filler
metal
What is a normal Electrode extension for a FCAW-S? - Answer -1 1/2 - 2 1/2
What type of drive roller is best suited for FCAW? - Answer -Knurled
There are several types of SAW fluxes. Which one is reusable? - Answer -Fused flux
Which wire feeder set-up is used with SAW aim CC mode? - Answer -Voltage sensing
, Brazing takes place by using a filler metal that becomes liquid at what temperature? -
Answer -450 degrees C
In OFB of is the filler drawn into the joint? - Answer -Capillary action
Which shielding gas is used to purge a copper pipe for brazing? - Answer -Nitrogen
What drawing works off of 30° on both sides of the centreline? - Answer -Isometric
What is the most serious welding defect? - Answer -Cracking
How is the length of a file found? - Answer -Measuring from the tip to the heel
What polarity is mostly used for ACAG? - Answer -DCEP
Why is a smaller tip used rather than turning a torch down when cutting thin materials? -
Answer -To prevent burn back into the torch
If the bottom edge of the OFC is irregular and rough, what is the likely cause? - Answer
-Travel speed to slow
PAC uses what mode of process operation? - Answer -Transferred arc
When must fall protection be employed? - Answer -Heights greater than 10' 3M
What is the max noise for workers to be exposed to? - Answer -85Dba
How far should a ladder extend past a roof ledge? - Answer -3 feet
What's the square reef knot used for? - Answer -Tying 2 ropes of equal diameter
together
If your sling included angle exceeds _______ ° you should use a spreader bar. -
Answer -120
When you hear the popping sound in oxy-fuel, what is happening? - Answer -Back fire
What is more serious flashback or backfire? - Answer -Flashback
What is the critical point of acetylene? - Answer -21°C / 28 PSI it explodes
How far should open a fuel gas cylinder? - Answer -1 1/2-2 turns
What are oxy-fuel fittings and connections made of? - Answer -Brass alloy
