To prevent fume hazards, there must be at least ________ cubic feet of air for each welder.
D) 10,000
A good safety practice is _______.
A) writing HOT on hot metal before leaving it unattended
Cutting operations should never be performed without a _____ in the area.
C) fire watch
When pure oxygen is combined with fueled gases, the pure oxygen produces _______.
C) a high-temperature flame needed for flame cutting
The smallest standard oxygen cylinder holds about ______ cubic feet of oxygen.
D) 85
Acetylene gas must be withdrawn from a cylinder at an hourly rate that does not exceed _____ of the cylinder capacity.
A) 1/10
Safety fuse plugs in the top and bottom of an acetylene cylinder are designed to _______.
C) release acetylene gas in the event of a fire
Methyl-acetylene propadiene (MAPP*) gas, a liquefied fuel used in oxyfuel cutting, burns at temperatures almost as high as acetylene and has the stability of ______.
A) propane
The amount of liquefied gas remaining in a cylinder is determined by the ______ of the cylinder.
B) weight
The regulators used on fuel gas cylinders are often painted red and always have ____ on all connections.
D) left-hand threads
The attachment on the top of a fuel gas cylinder that allows the gas to flow only in one direction is called a ____.
C) check valve
The cutting tips used with liquefied fuel gases must have at least____ preheat holes.
B) six
When lifting oxyfuel cutting cylinders, always use a(n) _____.
C) cylinder cage
To avoid injury from dirt that may be lodged in the valve and regulator seat of a gas cylinder, always stand______ the valve when opening the valve to clear the regulator seat.
A) to the side of
When clearing debris from new oxyfuel cutting equipment hoses, blow the hoses out with_______.
A) nitrogen
The first step in installing a cutting tip is to _________.
B) identify the thickness of the material to be cut
Before opening cylinder valves, veriify that the adjusting screws on the oxygen and fuel gas regulators are ______.
C) loose
When a cutting flame has an excuss of fuel, the flame is called a(n) _______ flame.
C) carburizing
When disassembling oxyfuel equipment verify that all pressure gauges read ______ before starting to take equipment apart.
D) 0
When inspecting a completed cut made with oxyfuel cutting equipment, the drag lines of the cut should be near ____ and not very pronounced.
A) vertical
Define Backfire
Backfire is a loud snap or pop as a torch flame is extinguished
Define Carburizing flame and what else is it called?
A carburizing flame is a flame burning with an excess amount of fuel; also called a reducing flame.
Define Drag lines
Drag lines are the lines on the kerf that result form the travel of cutting oxygen stream into, through, and out of the metal.
Define Ferrous metals
Ferrous metals are metals that contain iron
Define Flashback
Flash back is the tip, torch, hose, or regulator, causing a high-pitched whistling or hissing sound.
Define Kerf
Kerf is the edge of the cut
Define Neutral Flame
Neutral flame is a flame-burning with correct proportions of fuel gas and oxygen.
Define Oxidizing flame
Oxidizing flame is a flame burning with an excess amount of oxygen
Define Pierce.
Pierce is to penetrate through metal plate with an oxyfuel cutting torch
Define Slag
Slag is a nonmetallic product resulting from the mutual dissolution of flux and non metallic impurities in some welding and brazing processes.
Define Soapstone
Soapstone is the soft, white stone used to mark metal
