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WorksheetsWelding Chapters 1-3
Total questions: 24
Worksheet time: 12mins
Oxygen flame cutting is a chemical reaction that occurs between the steel and ______ ______ ______.
torch flame cone
cutting oxygen stream
fuel gas cylinder
oxygen gas cylinder
The kindling temperature of steel is__________.
1300 degrees
1400 degrees
1500 degrees
1600 degrees
When the oxygen cutting jet burns the iron in the steel, which has been heated to kindling temperature by oxyfuel preheat flames, what is the result?
welding
soldering
severing
oxidation
When the oxygen stream and the preheated metal combine, what is formed?
iron oxides
kerf
bead
flux
If metal is heated and permitted to cool, _______ ______ form on the surface.
light scales
heavy scales
light grooves
heavy grooves
One advantage of the OFC process is that it is extremely _________.
portable
safe
neat
stable
The materials that can be cut with OFC are limited primarily to ________ materials.
fibrous
fibulous
ferrous
ferret
The two main areas of safety to be considered in OFC include safety in the welding area and __________.
company safety
fire safety
chemical safety
personal safety
The temporary effects of burning the eyes with ultraviolet/infrared rays include _________.
nausea
loss of movement
vertigo
potential blindness
_______ provide extra protection when grinding or performing surface cleaning
goggles
boots
leathers
glasses
Two hazards from which ear plugs protect the welder are hearing loss and _______ ________.
electrical shock
flying sparks
chemical burns
blurred vision
A filter plate on a welding shield will not only provide shielding from the flame but also ______ of the oxyfuel flame.
oxidation
cooling
visibility
tinting
Leathers should always be worn when working in _________.
water
cold temperature
low light
tight quarters
The fume plume may cause which of the following temporary side effects?
coughing
loss of memory
dizziness
hallucination
_________ is identified in the text as one of the more critical of the hazardous elements.
iron
nickel
copper
argon
What is the unit of measure for fume exposure as determined by OSHA?
Milligrams of particulates per cubic meter of air
pounds per square inch
cubic foot per pound
gallons per hour
Manganes and chromium are two examples of materials which have very strict _____ _______ limits.
chemical content
electricaul current
lead exposure
time exposure
Which of the following is the best way to avoid respiratory hazards?
wearing a breathing mask
wearing an oxygen mask
providing good ventilation
limiting the use of chromium
If a high-vacuum/low-volume smoke extraction system is used, where is the fume removed?
after the breathing zone
directly at the source
at the cylinder outlet
overhead
A welder opens the cylinder valve slightly and closes it immediately. What process did he/she perform?
Cracking the cylinder
purging the cylinder
purging the lines
clearing the torch
A device that prevents the reverse flow of gases that would result in a combustible mixture in the welding hose is a ________.
flashback
regulator valve
check valve
safety clamp
If a welder were to look at the torch inlet or the regulator outlet, he or she would see a __________.
check valve
cylinder
hose
flash clamp
A condition in which the flame burns inside the tip, torch, or the hose is known as a __________.
backfire
backdraft
flash valve
flashback
When an accidental mixing of gases occurs in the hose or regulator, which of the following is the most likely cause?
leak in the hose
venture effect
unequal pressures in the hoses
defective torch
