Review Questions
To prevent fume hazard there must be at least _______ cubic feet of air for each welder.
10,000
Cutting operations should never be performed without a ________ in the area.
Fire watch
A good safety practice is
Writing HOT on hot metal
In the top and bottom of the acetylene cylinder are safety plugs with a melting point of _________.
220 f
When preparing oxyfuel equipment for use, momentarily crack open the valve on each cylinder to __________.
remove any dirt
The smallest standard oxygen cylinder holds about ________ cubic feet of oxygen
85
Acetylene gas must be withdrawn from a cylinder at an hourly rate that does not exceed _________ percent of the cylinder capacity.
10
The amount of liquified gas remaining in a cylinder is determined by the ________ of the cylinder
weight
When an empty cylinder has been removed from the workstation and stored, it must be marked MT near what area of the cylinder?
near its top
The fuel gas regulator's high pressure gauge usually reads up to __________.
400 psi
When pure oxygen is combined with fuel gases, the pure oxygen produces __________.
a high temperature flame needed for flame cutting
When lifting oxyfuel cylinders always use a ___________.
Cylinder cage
The cutting tips used with liquified fuel gases must have at least _________ preheat holes.
six
When welding or cutting metal, wear high-top safety boots that are at least ___________.
8" tall
After adjusting torch on a motorized oxyfuel cutting machine to the desired position, you should __________.
tighten all clamping screws
The attachment on the top of a fuel gas cylinder that allows the gas to flow only in one direction is called a __________.
Check valve
Safety fuse plugs in the top and bottom of an acetylene cylinder are designed to ________.
release acetylene gas in the event of a fire
The regulators used on fuel gas cylinders are often painted red and always have _________ on all connections
left-handed threads
Oxyfuel cylinders are under high pressure and should never be exposed to heat in excess of ________.
140 F
When shutting down oxyfuel cutting equipment, what should you do after you close the valves on the fuel gas and oxygen cylinders?
Back the regulator adjustment screws out until they are loose.
The first step in selecting a cutting tip is to _______.
Identify the thickness of the material to be cut.
When inspecting a completed cut made with oxyfuel cutting equipment, the drag lines of the cut should be near _________ and not very pronounced.
vertical
when a cutting flame has an excess of fuel the flame is called a __________ flame.
carburizing
The hoses used to carry oxygen from the cylinder to the torch are usually ______.
Green
If a cylinder is found to be defective, you should ________.
Place a warning tag on it