Oxy-fuel1
True/false. Lead can be found in paint and other coatings and should be removed before cutting begins.
TRUE and where a respirator this is toxic.
Which of the components of an oxy-fuel cutting set up is the safety device?
Flashback arrestor
What is the ignition temperature for carbon steel?
870 C
What is the holes in a torch tip called?
Orifices
What is it called when cutting off a bolt or rivet?
Washing
Why is acetylene a preferred fuel gas for oxy-fuel cutting?
It has a high flame temperature.
What is an advantage of using natural gas for oxy-fuel cutting in a shop.
It can be piped in like are back fab shop
What happens to acetylene when it reaches its critical point?
It becomes unstable and could explode.
Who is responsible for maintaining fuel gas cylinders?
The supplier.
What is the cause of an oxy-fuel flame that turns purple?
Acetone contamination.
Which safety device is used to protect acetylene cylinders from excessive pressure?
Fusible plug.
Which condition is possible when the draw limit of an acetylene cylinder has been exceeded.
The pressure will drop and lead to flashback.
What are the conditions for storing fuel gas and oxygen cylinders?
Upright secured to a wall or cart in a designated area 6m or (20) feet apart
What is a function of a single stage pressure regulator?
Reduces cylinder pressure?
True/False You can check for leaks on a oxy-fuel torch with a lighter or striker?
(False) (False) If you said true find another trade
What unstable compound is formed when acetylene comes into contact with copper or brass fittings?
Acetylide
Propane comes in containers stored as liquid or gas?
Liquid
What prevents an oxygen regulator from being connected to a fuel gas cylinder?
The direction of the threads.
What is done to a regulator before opening the cylinder valve?
Back out the pressure adjustment screw.
Which material are oxygen hose fittings made from?
Brass
What distinguishes a fuel gas hose fitting from an oxygen gas hose fitting?
A groove cut around the outside.
Which gas can be used in a grade R hose?
Acetylene
What determines an oxyfuel cutting hose's diameter?
The torch tip and hose length.
What is the purging procedure for new oxy-fuel hose?
Blow out the hose with an oil-less compressed air system.
How often should reverse flow check valves be inspected?
Monthly