WorksheetsModule 8
Total questions: 55
Worksheet time: 55mins
What is the term for the width of the cut produced by any cutting process?
drag line
kerf
wraparound
slag
Which fuel gas can be used to cut low carbon steel?
MAPP
Proprane
Acetylene
All of the Above
The maximum recommended safe working pressure for Acetylene is
10 psi
15 psi
20 psi
32 psi
Which oxyacetylene flame has an excess of fuel?
oxidizing
neutral
carburizing
none of the above
The oxyfuel process uses oxygen and what other types of gases?
inert gases
reactive gases
mixes gases
flammable gases
To insure that oxyfuel lines are not improperly connected, fuel gas hoses are
red with right-hand threads
red with left-hand threads
green with right-hand threads
green with left-hand threads
A fully charged acetylene cylinder contains approximately?
15 psi @ 70 degrees F
225 psi @ 70 degrees F
500 psi @ 70 degrees F
2,200 psi @ 70 degrees F
While cutting with acetylene, the oxygen working pressure is
greater than the acetylene working pressure
equal t the acetylene working pressure
less that the acetylene working pressure
a constant 20 pounds per square inch
While flame cutting, the preheat flames (with the cutting jets open) should be
carburizing
oxidizing
neutral
reducing
Oxyacetylene torches can cut
stainless steel
aluminum
copper nickel alloys
carbon steel
If an excessive amount of preheat is used when making an oxyfuel cut, the
cutting stream may gouge the left side of the cut
top edge may be melted or removed
cut may be incomplete
sides of the kerf may be dished
It is not necessary to wear shaded lenses when oxyfuel cutting, because it uses a flame of an electric arc.
True
False
Acetylene can be used with any oxyfuel cutting tip.
True
False
Mechanized OFC is commonly referred to as a track burner.
True
False
During the Mechanized OFC process, there is no need for the operator to monitor the cut being made.
True
False
A good quality cut will have drag lines that do not slant or curve backwards.
True
False
The most common cause of the top edge being melted away during a cut is traveling too fast.
True
False
In Plasma Arc Cutting (PAC), the term "plasma" refers to
a shielding gas that protects the cutting stream from contaminants
a gas which has been heated to the point that it will conduct electricity
a long arc that transfers molten metal to the work piece
the glow produced by the arc used for cutting
While using the PAC process, the air must be
lubricated
completely dry
humididfied
inert
What is the metallic residue from a Plasma cut called?
drag
kerf
slag
dross
During a Plasma cut, the temperature of the arc is approximately
11,000 degrees F
23,000 degrees F
43,000 degrees F
120,000 degrees F
What material listed below, gives off toxic zinc fumes when plasma cutting?
aluminum
galvanized steel
high carbon steel
high strength low alloy steel
A plasma arc cutting power supply must be able to produce
alternating current (AC)
direct current (DC)
either AC or DC
low voltage
The electrodes for Plasma arc torches are made from
brass
tungsten
stainless steel
carbide
PAC will not work on aluminum because aluminum is non-magnetic.
True
False
A high travel speed with plasma cutting will result in heat input that is much higher than that produced by oxyfuel cutting processes.
True
False
PAC produces a large quantity of fumes that are potentially hazardous.
True
False
The width of a PAC cut is narrower than an oxyfuel cut.
True
False
When using PAC, there is no need to worry about excessive flying sparks.
True
False
One should always use the proper filter plate shade number when using the PAC process.
True
False
Because Plasma Arc Cutting is so much faster than Oxyfuel Cutting, there is no time for the material to get hot.
True
False
One should never operate the PAC process if there is moisture on or around the equipment.
True
False
When using CAC-A, the molten metal is removed by
a jet of air passing through the arc
the oxygen in the air causing the metal to oxidize
setting the work piece on edge so the molten metal can run downhill
metal vaporizing from the intense arc
What amount of air pressure is normally supplied to a heavy-duty air carbon arc electrode holder?
40 to 60 cubic feet per hour
50 to 70 pounds per square inch
60 to 80 cubic feet per hour
80 to 100 pounds per square inch
While performing air carbon arc cutting, a carbon mixture or ___ electrode can be used
copper coated tungsten
copper coated graphite
copper coated zinc
copper coated steel
Because the CAC-A process is so precise there are few, if any, flying sparks.
True
False
The CAC-A process does not require electricity.
True
False
One should always use the proper shade number when using the CAC -A process
True
False
Due to the excessive noise produced by CAC-A, proper ear protection is required.
True
False
Fumes are a potential hazard associated with the CAC-A process.
True
False
The CAC-A process requires the same shade of filter plate as PAC.
True
False
What is AB?
work piece
power supply
electrode lead
concentric cable
What is A?
torch
power supply
compressed air
work piece lead
What is B?
concentric cable
carbon electrode
electrode lead
work piece lead
What is C?
concentric cable
carbon electrode
electrode lead
work piece
What is D?
concentric cable
carbon electrode
electrode lead
work piece lead
What is E?
torch
carbon electrode
electrode lead
work piece
What is AC?
torch
carbon electrode
electrode lead
work piece
What is AD?
torch
carbon electrode
electrode lead
work piece
What is AB?
work piece
shielding gas nozzle
constricting nozzle
electrode
orifice gas
What is A?
work piece
shielding gas nozzle
constricting nozzle
electrode
shielding gas
What is B?
work piece
shielding gas nozzle
constricting nozzle
electrode
shielding gas
What is C?
orifice gas
shielding gas nozzle
constricting nozzle
electrode
shielding gas
What is D?
orifice gas
shielding gas nozzle
constricting nozzle
electrode
shielding gas
What is E?
orifice gas
shielding gas nozzle
constricting nozzle
electrode
constricting nozzle
