NCCER Oxy Fuel Cutting - Module 2

The most suitable cutting process to use on ferrous metals such as straight carbon steel is .

• carbon arc cutting

• oxyfuel cutting

• powder cutting

• plasma arc cutting

Answer explanation

Page Ref: Sec. Ref. 1.1.0 Objective: 1a

The oxidation that occurs during an oxyfuel cutting operation is similar to a greatly sped-up ___.

• tempering process

• annealing process

• rusting process

• crystallizing process

Answer explanation

Page Ref: Sec. Ref. 1.1.0 Objective: 1a

For long-term cutting of materials containing cadmium or mercury, always wear an approved .

• supplied air respirator

• metal-fume filter

• HEPA-rated filter

  standard respirator

• standard respirator

Answer explanation

Page Ref: Sec. Ref. 1.2.1 Objective: 1b

When performing oxyfuel cutting, it is acceptable to wear .

• a cap and safety glasses

• a face shield over safety glasses

• a hard hat and sunglasses

• a vented mesh cotton hood

Answer explanation

Page Ref: Sec. Ref. 1.2.1 Objective: 1b

Two types of gases that tend to concentrate in and along low areas are .

• acetylene and propylene

• methane and butane

• propylene and propane

• butane and propane

Answer explanation

Page Ref: Sec. Ref. 1.2.2 Objective: 1b

Oxygen cylinders must be tested ___.

• annually

• every three years

• every five years

• every ten years

Answer explanation

Page Ref: Sec. Ref. 2.1.1 Objective: 2a

Combining pure oxygen with a burning material causes a fire to ___ .

• burn rapidly and violently

• pop loudly and extinguish

• die down and then flare up

• burn cooler and more slowly

Answer explanation

Page Ref: Sec. Ref. 2.1.1 Objective: 2a

In the top and bottom of an acetylene cylinder are safety plugs with a melting point of ___.

• 212°F (100°C)

• 260°F (126.7°C)

• 300°F (148.9°C)

• 330°F (165.6°C)

Answer explanation

Page Ref: Sec. Ref. 2.1.2 Objective: 2a

Three fuel gases other than acetylene used for cutting include ____.

• argon, oxygen, and helium

• methane, butane, and oxygen

• natural gas, propylene, and propane

• benzene, halon, and fluorine

Answer explanation

Page Ref: Sec. Ref. 2.1.3 Objective: 2a

As a reminder that the regulator on a cylinder has left-handed threads, a V-notch is sometimes cut around the _______.

• regulator

• cylinder

• threads

• nut

Answer explanation

Page Ref: Sec. Ref. 2.2.0 Objective: 2b