Exam 17: Oxyfuel Welding and Cutting Equipment, Setup, and Operation

A(n) ____ occurs when the flame burns back inside the tip, torch, hose, or regulator.

A(n) ____ flame has an excess of fuel gas. This flame has the lowest temperature and may put extra carbon in the weld metal.

The ____________________ hand torch is the most common type of oxyfuel gas torch used for welding and cutting.

A(n) ____ flame has an excess of oxygen. This flame has the highest temperature and may put oxides in the weld metal.

A flashback that reaches the cylinder may cause a fire or an explosion.

A(n) ____ flame has a balance of fuel gas and oxygen. It is the most commonly used flame because it adds nothing to the weld metal.

A ____ works by holding the forces on both sides of a diaphragm in balance.

A(n) ____ is made up of a small ball held tightly against a seat by a spring.

A(n) ____ occurs when a flame goes out with a loud snap or pop.

Acetylene is the most widely used fuel gas because of its high temperature and concentrated flame.

The purpose of the ____ valve is to prevent gases from accidentally flowing out of one hose through the torch body and then into the other hose.

A regulator that is left pressurized causes the diaphragm to stretch, the ____________________ to straighten, and the adjusting spring to compress.

A(n) ____ is a thin piece of metal held between two seals.

The regulator pressure-adjusting screw should be backed off each time the oxyfuel system is being shut down.

Rupture disk safety devices are one-time-use devices.

The ____________________ pressure gauge shows the regulated pressure being controlled for the torch.

Dedicated cutting torches are usually shorter than combination torches.

All oxyfuel processes use a high-heat, high-temperature flame produced by burning a fuel gas mixed with carbon dioxide.

A ____ will stop both reverse gas flow and the flame of a flashback.

The working pressure of a gauge is always a little less than the torch tip pressure due to some line drop.