AIT FIRST YEAR LATEST
WELD EXAM
A free standing scaffold must not be taller than ____ times its smallest
dimension in width - ANSWERS-3
Guardrails with a horizontal rail must be what amount of inches above
the platform - ANSWERS-36-42" above the platform
What is mousing - ANSWERS-Using wire across the throat of a hook so
the sling cannot slip out
Where is the mixing chamber located on a balanced pressure torch -
ANSWERS-Between torch body and tip
Using a spreader beam to hoist a load would be an advantage when -
ANSWERS-When living long hard to handle loads
How much acetone is in Acetelyne cylinders - ANSWERS-30%
What forms ozone? - ANSWERS-When oxygen and atmospheric air
comes in contact with ultraviolet light
END OF
PAGE
1
, AIT FIRST YEAR LATEST
WELD EXAM
Chlorinated solvents such as brake clean combined with ultraviolet light
create? - ANSWERS-Phosgene gas
dizziness and euphoria are signs of? - ANSWERS-Oxygen difficiency
Most wire fed applications use what type of current - ANSWERS-Direct
current reverse polarity, DCRP
A wire feeder system includes what? - ANSWERS-Drive roll system,
variable speed motor
Gun and cable assemblies are rated by what? - ANSWERS-Current
carrying capacity
What is the purpose of a shielding gas - ANSWERS-Protect weld metal
from atmospheric air
The regulator does what? - ANSWERS-reduces gas source pressure to a
working pressure
END OF
PAGE
2
, AIT FIRST YEAR LATEST
WELD EXAM
What do flow metres do? - ANSWERS-Indicate volumetric flow rate in
liters, per minute or cubic feet per hour
Construction of power sources and duty cycles are meant to
specification of who? - ANSWERS-NEMA
What type of volt amp curve does CV machines have? - ANSWERS-
Relatively flat volt amp curve
What type of volt amp curved do cc machines have - ANSWERS-
Drooping volt amp curve
Filler wires must be manufactured to? - ANSWERS-Match the
chemistry of base metal and mechanical properties such as tensile
strength, ductility and impact strength
What csa specification covers filler metals - ANSWERS-Csa w48
END OF
PAGE
3
, AIT FIRST YEAR LATEST
WELD EXAM
What three types of wire drive systems are there - ANSWERS-Push,
pull and push pull
Where are the drive rolls located in a push system - ANSWERS-In the
wire feed unit
In a push system what is the max distance of cable - ANSWERS-15ft
Where are the drive rolls located in a pull system - ANSWERS-Mounted
in the gun close to the contact tip
What problem does the pull system overcome - ANSWERS-Wire hang
ups with soft wires
What type of wire is used in a pull system - ANSWERS-Small diameter
or soft electrode wires such as aluminum wires
What is a pull system also known as - ANSWERS-Spool on gun
END OF
PAGE
4
WELD EXAM
A free standing scaffold must not be taller than ____ times its smallest
dimension in width - ANSWERS-3
Guardrails with a horizontal rail must be what amount of inches above
the platform - ANSWERS-36-42" above the platform
What is mousing - ANSWERS-Using wire across the throat of a hook so
the sling cannot slip out
Where is the mixing chamber located on a balanced pressure torch -
ANSWERS-Between torch body and tip
Using a spreader beam to hoist a load would be an advantage when -
ANSWERS-When living long hard to handle loads
How much acetone is in Acetelyne cylinders - ANSWERS-30%
What forms ozone? - ANSWERS-When oxygen and atmospheric air
comes in contact with ultraviolet light
END OF
PAGE
1
, AIT FIRST YEAR LATEST
WELD EXAM
Chlorinated solvents such as brake clean combined with ultraviolet light
create? - ANSWERS-Phosgene gas
dizziness and euphoria are signs of? - ANSWERS-Oxygen difficiency
Most wire fed applications use what type of current - ANSWERS-Direct
current reverse polarity, DCRP
A wire feeder system includes what? - ANSWERS-Drive roll system,
variable speed motor
Gun and cable assemblies are rated by what? - ANSWERS-Current
carrying capacity
What is the purpose of a shielding gas - ANSWERS-Protect weld metal
from atmospheric air
The regulator does what? - ANSWERS-reduces gas source pressure to a
working pressure
END OF
PAGE
2
, AIT FIRST YEAR LATEST
WELD EXAM
What do flow metres do? - ANSWERS-Indicate volumetric flow rate in
liters, per minute or cubic feet per hour
Construction of power sources and duty cycles are meant to
specification of who? - ANSWERS-NEMA
What type of volt amp curve does CV machines have? - ANSWERS-
Relatively flat volt amp curve
What type of volt amp curved do cc machines have - ANSWERS-
Drooping volt amp curve
Filler wires must be manufactured to? - ANSWERS-Match the
chemistry of base metal and mechanical properties such as tensile
strength, ductility and impact strength
What csa specification covers filler metals - ANSWERS-Csa w48
END OF
PAGE
3
, AIT FIRST YEAR LATEST
WELD EXAM
What three types of wire drive systems are there - ANSWERS-Push,
pull and push pull
Where are the drive rolls located in a push system - ANSWERS-In the
wire feed unit
In a push system what is the max distance of cable - ANSWERS-15ft
Where are the drive rolls located in a pull system - ANSWERS-Mounted
in the gun close to the contact tip
What problem does the pull system overcome - ANSWERS-Wire hang
ups with soft wires
What type of wire is used in a pull system - ANSWERS-Small diameter
or soft electrode wires such as aluminum wires
What is a pull system also known as - ANSWERS-Spool on gun
END OF
PAGE
4
