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

Question 1

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

Answer 1

True

Question 2

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

Answer 2

True

Question 3

Internal and external moving parts on a regulator or a gauge require oiling.

Answer 3

False

Question 4

Leak-detecting solution must be free flowing so that it can seep into small joints, cracks, and other areas that may have a leak.

Question 5

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

A) flashback
B) backfire
C) burn
D) overheating

Question 6

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) torch fuel
B) reverse flow
C) acetylene
D) safety disc

Question 7

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

Question 8

Dedicated cutting torches are usually shorter than combination torches.

Question 9

Gauges that read "0" (zero) pressure when the pressure is released, or those that have a damaged glass or case, must be repaired or replaced.

Question 10

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

A) acetylene
B) neutral
C) oxidizing
D) carburizing

Question 11

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

A) safety disc
B) oxygen regulator
C) torch valve
D) safety valve

Question 12

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

A) flashback arrestor
B) reverse flow valve
C) safety release valve
D) safety disc valve

Question 13

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

A) oxygen regulator
B) safety disc
C) safety release valve
D) torch valve

Question 14

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

A) overheating
B) flashback
C) burn
D) backfire

Question 15

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

A) cylinder valve
B) regulator
C) safety disc
D) torch valve

Question 16

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

Question 17

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

Question 18

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

Question 19

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

A) oxidizing
B) carburizing
C) neutral
D) acetylene

Question 20

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) neutral
B) carburizing
C) acetylene
D) oxidizing

Question 21

A(n) ____________________ is the only safe device to use when lighting any torch.

Question 22

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

Question 23

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

Question 24

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

Question 25

High-pressure valve seats that leak result in a(n) ____________________ or rising pressure on the working side of the regulator.