Module - Oxy-Fuel Equipment & Procedures Part A Flashcards
What class of fire extinguisher would you use for a wood and paper fire?
Class A - Wood & Paper (Ash)
What class of fire extinguisher would you use for a flammable liquids fire?
Class B - Flammable Liquids (Barrel)
What class of fire extinguisher would you use for an electrical fire?
Class C - Electrical (Current)
What class of fire extinguisher would you use for a combustable metals fire?
Class D - Combustable Metals
A new cylinder of Oxygen is fully charged to _____ psi at 70 degrees F (21 degrees C)
2200 PSI
Acetylene gas is highly flammable, and the explosive mixture of acetylene in air ranges from ___% to ___%.
2.5 & 80
The critical point of acetylene is ___PSI
28 PSI
The maximum safe working pressure (MSWP) for acetylene is ___PSI
15 PSI
The melting temperature of the fusible plug in an acetylene tank is ___ degrees Celsius.
100
When welding with a size 3 tip, your acetylene should be set to ___PSI and your oxygen set to ___PSI.
3 & 3
When cutting with acetylene your acetylene pressure should be at ___PSI and your oxygen pressure at ___PSI.
Acetylene - 5 PSI
Oxygen - 25 PSI
Goggles are worn when cutting and brazing to protect the eyes from:
a) light rays.
b) heat rays.
c) sparks and slag.
d) all of the above.
d) all of the above.
What is the best type of clothing used for brazing and cutting?
a) cotton
b) rayon
c) leather
d) denim
c) leather
The most suitable footwear for cutting and brazing is:
a) shoes.
b) safety shoes.
c) boots.
d) high-top leather safety boots.
d) high-top leather safety boots.
What three elements are necessary for a fire to occur?
a) heat, air, oxygen
b) fuel, heat, oxygen
c) fuel, air, oxygen
d) heat, fuel, gas
b) fuel, heat, oxygen
Which type of fire extinguisher should be used on a Class C fire?
a) wet blanket
b) soda acid
c) water pump tank
d) dry chemical
d) dry chemical
What is the purpose of the disc that is mounted on one side of the oxygen cylinder valve?
a) the disc identifies the type of gas in the cylinder
b) it is designed to rupture in an emergency at 4000 psi
c) this safety device is designed to rupture at 4200 psi from extreme pressure caused by heat
d) this rupture disc is a safety device designed to burst at 3200 psi and allow a slow, controlled escape of gas
d) this rupture disc is a safety device designed to burst at 3200 psi and allow a slow, controlled escape of gas
When oxygen is being used the cylinder valve should be opened:
a) fully.
b) 2 turns.
c) 1 turn.
d) 1 turns.
a) fully.
The maximum safe working pressure for acetylene is:
a) 28 psi.
b) 70°F.
c) 15 psi.
d) 21°C.
c) 15 psi.
What does the term draw limit mean?
a) the maximum amount of oxygen that can be used per hour
b) the maximum amount of acetylene that can be used per day
c) the ability of an apprentice to draw and sketch
d) the maximum amount of acetylene that can be drawn from the cylinder without drawing liquid acetone
d) the maximum amount of acetylene that can be drawn from the cylinder without drawing liquid acetone
Fusible plugs in acetylene cylinders are located:
a) in the side of the cylinder.
b) on the shoulder and bottom of the cylinder.
c) in the acetone.
d) in the regulator.
b) on the shoulder and bottom of the cylinder.
The acetylene cylinder must be used:
a) in a vertical position.
b) in a horizontal position.
c) at 45 degrees.
d) at 70 degrees.
a) in a vertical position.
What colour is the acetylene hose used with oxyacetylene equipment?
a) red
b) green
c) orange
d) purple
a) red
- Testing for leaks on oxyacetylene equipment should done with:
a) an open flame.
b) a striker.
c) leak detection fluid.
d) a water hose.
c) leak detection fluid.
The function of a regulator in oxyacetylene equipment is to:
a) maintain a fluctuating delivery pressure.
b) reduce cylinder pressure to working pressure.
c) reduce working pressure to cylinder pressure.
d) maintain a fluctuating delivery pressure regardless of the pressure changes at the source.
b) reduce cylinder pressure to working pressure.
