-
cylinders shall be moved by tilting and rolling them on there ------- edges
Bottom
-
Fuel gas cylinders shall be placed with valve ------ whenever in use
end up
-
Fuel gas hose and oxygen hose shall be easily __________ from each other
Distinguishable
-
Hose couplings shall be of the type that cannot be unlocked or disconnected by means of a ______ without rotary motion
Straight pull
-
Oxygen cylinders and ______ shall be kept away from oil or Greece
Fittings
-
All arc welding and cutting cables shall be of the completely _______ flexible type
Insulated
-
cables in need of repair ______ be used
Shall not
-
All ground _______ shall be inspected to ensure that they are mechanically strong and electrically adequate for the required current
Connections
-
The term _______ means the equipment or material included in a list published buy a nationally recognized testing laboratory
Listed
-
Shall is used to indicate ______ which are mandatory
Provisions
-
Supervisors shall be responsible for the safe ________ of the welding equipment and for the safe ______ of the welding process
Handling, use
-
Welders shall cut or weld only where all _______ have been met
Safety precautions
-
Goggles shall be vented to deter _______ of the lenses
Fogging
-
Helmets hand- shield and goggles shall be well _______ and should not be transferred from one employee to another without being cleaned
Maintained
-
Cape sleaves or shoulder covers with bibs made of ________ or other_______ material shall be worn during overhead welding cutting or other operations when necessary
Leather, flame resistant
-
Caps made from_________ materials shall be worn under helmets when necessary to prevent head burns
Flame resistant
-
Only ________ respiratory protective equipment shall be used
Approved
-
Adequate _______ shall be provided for all welding cutting brazing and related operations
Ventilation
-
Before______ or_______ is begun in a location not designed for such purposes inspection and authorization by a designated management representative shall be required
Welding, cutting
-
Confined spaces shall be tested for toxic or flammable gases, dusts and vapors, and for________or_______oxygen before entering and during occupancy
Adequate, excess
-
When welding or cutting in confined spaces, gas cylinders in welding power sources shall be located ________the confined space
Outside
-
When a person enters confined space through a manhole or other small opening, means shall be provided for __________ outside personnel for help
Signaling
-
Installation and operation of welding, cutting, and related equipment shall be done by, or under the supervision of a ________operator
competent
-
Cylinder valves shall be _______when equipment is unattended
closed
-
Hoses cables and conduit shall be ______ and ________ so that they will not be physically damaged
Located, protected
-
Oxy- fuel cutting is the process of _______ iron or steel into distinct pieces by using an oxy-fuel flame in combination with a jet of pure oxygen
seperating
-
oxy-fuel gas cutting of ferrous metals is a process of _______ the material to be cut to its kindling or ignition temperature
preheating
-
An oxyacetalene flame has a peak temperature of approximatly
C. 6300 f
-
List three types of oxyacetalene flames
carburizing, neutral, oxidizing
-
A _______ flame wich consumes approximatley half oxygen from cylender and half acetelene, is used mostly for welding steel.
neutral
-
When more oxygen is supplied to the _____ flame, the inner cone becomes darker and shorter and the whole flame is smaller and hotter
neutral
-
In most cases, cuts are started at the _____ of the piece.
edge
-
Never adjust an oxyacetelene flame by ______ the amount of acetelene
reducing
-
Oxyacetelene welding is a ___________ process where coalesence is produced by heating with a gas flame.
gas-welding
-
What are two types of work stations
A. Portable type, B. Stationary type
-
Oygen cylinders are supplied with speacially designed bronze valves which are always _____ open when the oxygen is being used
fully
-
a small drop of oil or greese inside an oxygen ____ or _____ can cause a explosion
valve, regulator
-
when Acetylene is continuosly withdrawn at a rate which exceeds 1/7th of the cylinders ____ volume (not its capacity), acetone comes out
actual
-
Acetylene is generated as the result of the chemical reaction of _______ and water
Calcium carbide
-
Recompressing high pressure oxygen in a ____ pressure cavity may create ____ resulting in combustion
low, heat
-
List the names of three sides of the fire triangle
- A. Fuel
- B.Oxygen
- C.kindling Point
-
all gas-air or gas oxygen _____ should be regarded as potentialy dangerous
Mixtures
-
the odor of commercial ____ is very noticable and charistic, even in small percentages
aceteylene
-
Propane is a _____ petroleum fuel, which comes from oil refineries or as gas off the top of oil wells.
liquified
-
the oxyacetylene system is commonly used for ___ and ____ operations in piping installations
cutting, welding
-
goggles with _____ lenses should be individually fitted to secure best efficiancy and personal comfort
colored
-
what are two types of oxyacetelyne torches
- a. The venturi proportioning or injector type
- b. The pressure-porportioning type
-
an injector type torch must be used with ____ fuel
acetyleyne
-
a _____ flame is produced by mixing a ratio of aprox. 1 volume of oxygen to 1 volume of acetylene
neutral
-
a torch is essentialy a set of gas tubes with ______ valves
control
-
What are the basic components of a torch?
- a. control vlaves
- b. the barrel and tubes
- c. the torch head
-
a welding tip or nozzle is normally an assembly consisting of a
- A welding tip
- B Cone and reducer
- C coupling nut
-
a cutting tip with six ______ orifcies will cut more readily in any direction
preheat
-
a single state regulator functions by balancing the force of the _______ spring against the outlet pressure
adjusting
-
the adjusting screw of a regulator controls the ____ of the gas and _____ pressure to the hose and torch
flow, delivery
-
fuel gas regulators have ______ threaded outlet connections
left-handed
-
the pressure on a low-pressuer gage may require some means of ______ for fluctuation in pressure whe it is used with a long hose or a high rate of flow
compensating
-
a premium quality welding hose, ______ is recomended for applications with all fuel gases including acetylene
Grade T
-
a ______ is the momentary recession of the flame into the torch tip followed by immediate reapperance of complete extiguishment of the flame
backfire
-
a _____ is the recession of the flame into or back of the mixing chamber of the torch
flashback
-
The reverse flow check valce principle employs a tiny spring mechanism which _____ a small ball or seat to provide a tight seal
activates
-
Reverse folow check valves and internal check valves are _____ devices that can leak when dirty or damaged
mechanical
-
diameter and length of flashback arrestors are _____ to the volume of gas passing through them
proportional
-
Flashback arrestors eliminate the risk of an explosion in the ____ and cylenders
regulator
-
a _____ journeyworker is one who knows not only the technical aspects of the piping trades but also the saftey precautions
competent
-
an approved filter lens, at least number ____ shade or darker, is required for eye protection when operating oxy-fuel equipment
five
-
all welding and cutting equipment must be kept clean and absolutly free of greese, oil and other _____ based substances
petrolium
-
Reverse flow check valves should be tested every ___ months at a minumum
three
-
regulators must be used only with the ____ and ____ for which the are designed
gasses, pressure
-
the oxygen torch connection is usually identified by a _____ in the torch body or in the torch handle, oppisite the oxygen valve
marking
-
reverse flow caused by ______ pressures results in mixed gases in hoses or regulators
un equal
-
do not activate an oxyacetelene system with the regulators pressure _____ screw turned in
adjusting
-
Before lighting the torch, ____ of the system is necessart to reduce the possibility of a mixed gas condition in the system
purging
-
check oxyacetylene equipment for leaks using an _____ oil free leak detection fluid
approved
-
Using less than required volume of acetylene gas for welding my result in _____ of tip or equipment and can lead to an internal fire or flashback
overheating
-
always match the ____ size to the metal to be cut or welded
tip
-
If the flame goes out and burns back within a torch, which usually produces a pronounced hissing or squealing noise, immediatly ____ the torch
shut off
-
How many adjustments are on a combination oxyacetylene cutting or welding torch
there are 4 adjustments- 2 located on the torch body and 2 located on the cutting assembly
-
List the proper order of the 2 steps for exstinguishing the torch flame after cutting or welding
A Turn the oxygen preheat valve to the closed position
B turn the gas torch clave to the closed position
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