Welding Class Flashcards
An electric current that reverses its direction at regularly recurring intervals
Alternating Current
The melting together of filler metal and base metal, or of base metal only to produce a weld
Fusion, fusion welding
A separation at the joint root between the workpieces
Root opening
What are the 4 welding test positions
Flat, horizontal, vertical, overhead
What are the 5 basic type of joints
Butt, corner, edge, lap, T joint
The junction between the face of the weld and the base metal
Toe of the weld
Name the parts of a fillet welding symbol and be able to draw it
Arrow side, other side, tail, fillet symbol, weld size, weld distance and spacing
What does AWS stand for
American Welding Society
What is the duty cycle defined as
The ratio of arc time to total time
Welding is a safe occupation if proper precautionary measures are always ___
Observed
Always wear____ when welding, cutting, or grinding. ___ injuries can be caused from arc flash
Proper eye protection
Avoid breathing in the ____ ______ directly above the arc
Fume plume
What must you do when a gas cylinder is empty.
Close the valve and mark the cylinder empty
What must you do when welding lead, cadmium, chromium, manganese, brass, bronze, zinc or galvanized steel.
Use mechanical exhaust and ventilate room
What must you do with the electrode holder when not in use? What must it not touch?
Hang it on a bracket. Never let it touch a compressed cylinder
What should you do to protect others eyes when welding.
Shield your welding area
How can you prevent sparks from hitting hoses, regulators, or cylinders?
Good housekeeping and keeping work area clean
What minimum shade must you use when grinding and welding?
Shade 5 lens
Store cylinders in a safe place with good ventilation. Should you keep oxygen and acetylene cylinders together or apart?
Keep apart to prevent accumulation of gases for possible explosion
How does a flashback sound? You should always use appropriate torches.
A flashback emits a loud and shrill squeal or hissing sound
Never use ___ and ___ on any threaded fittings for oxy acetylene torch
Oil and grease
Do not ___ or ___ cut in a confined space without taking special precautions.
Weld or flame cut
When assembling cylinder apparatus, always ____ the gas cylinder valve before attaching regulators
Crack the valve
What must you do with broken regulators?
Replace them or have it repaired by a qualified person
Be able to explain proper safety procedures for preparing and making an oxygen acetylene flame cut.
Have a pre-work safety plan, job, hazard analysis, get an OK to work or clearance, fill out hot, work, permit, have a firewatch, get proper PPE and fire extinguisher, clear area of flammable debris, protect equipment from potential damage, check and inspect fuel cylinders for proper operation, check fuel cylinder for sufficient amount of gas, pressure, check and inspect torch for proper operation, Clean tip of torch, light torch, and adjust flame, safely make cut and be aware of personal and equipment, Mark materials, hot, dispose of materials safely and check area for signs of fire, sign off, hot work permit and notify operations and file JHA
What to do to prevent undercut
Pause at each side of the weld bead when using a weaving technique
