Welding Flashcards
What burn penetrates skin to the flesh below
2nd degree burn
Most dangerous type of light ray emitted by welding
Infrared
Cylinders of compressed inert gasses are not flammable or reactive and are not dangerous
T or f
False
Welding lenses will protect your eyes from what percentage of harmful light rays
99%
List the three types of clothing in order of ability to protect, starting with the best
Leather
Wool/tweed
Cotton/denim
A face shield or safety goggles will protect your eyes when performing what actions
Chipping or grinding
Screens or blinds are out up to protect what
People and equiptment
List three components of fire
Heat air fuel
There are five classes of fire, for each class, list the type of combustible involved
Class a : wood paper
Class b: oil grease
Class c: electrical components
Class d: combustible metals
Class k: kitchen fires
Who’s responsibility is it to determine hazards
You
What is the maximum safe working pressure for acetylene
15 psi
Acetylene cylinders are protected against explosions by the use of
Fusible plugs
Oxygen cylinders are protected against explosions by the use of
Frangible disc
A process using continuous, solid wire electrode and an inert shielding gas is
GMAW
A process using a continuous, hollow wire electrode with or without shielding gas is
FCAW
Joining of light gauge material with a SMAW power source may be accomplished using what process
Carbon arc welding
The three types of flames available for OAW are
Carbonizing
Neutral
Oxidizing
If the oxygen connection is difficult to make, it should be oiled to lubricate the fitting
T or f
False
Where does a burn back occur
Between tip and mixer
Where does a flashback occur
Between mixer and regulators
Copper tubing can be used to splice a damaged hose
T or f
False
Braze welding does not involve the melting of the parent materials
T or f
True
Brazing sheet metal requires a filler material made from what
Brass
What are the purposes of fluxes in braze welding
Cleans oxides
Protect weld
2 types of joints used for braze welding
Butt joint
Lap joint
Oxy acetylene and plasma cutting do not actually cut the metal. The metal separates due do ?
Oxidization
The oxygen torch valve on the handle of a combination cutting/welding outfit should be opened ———— for cutting
Fully
Plasma arc cutting equiptment uses———— energy to create the heat necessary for cutting
Electric
