Free Printable NCCER Oxy Fuel Cutting

1.

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

a)

carbon arc cutting

b)

oxyfuel cutting

c)

powder cutting

d)

plasma arc cutting

2.

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

a)

tempering process

b)

annealing process

c)

rusting process

d)

crystallizing process

3.

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

a)

supplied air respirator

b)

metal-fume filter

c)

HEPA-rated filter

standard respirator

d)

standard respirator

4.

When performing oxyfuel cutting, it is acceptable to wear .

a)

a cap and safety glasses

b)

a face shield over safety glasses

c)

a hard hat and sunglasses

d)

a vented mesh cotton hood

5.

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

a)

acetylene and propylene

b)

methane and butane

c)

propylene and propane

d)

butane and propane

6.

Oxygen cylinders must be tested ___.

a)

annually

b)

every three years

c)

every five years

d)

every ten years

7.

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

a)

burn rapidly and violently

b)

pop loudly and extinguish

c)

die down and then flare up

d)

burn cooler and more slowly

8.

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

a)

212°F (100°C)

b)

260°F (126.7°C)

c)

300°F (148.9°C)

d)

330°F (165.6°C)

9.

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

a)

argon, oxygen, and helium

b)

methane, butane, and oxygen

c)

natural gas, propylene, and propane

d)

benzene, halon, and fluorine

10.

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

a)

regulator

b)

cylinder

c)

threads

d)

nut

11.

The hoses used to carry oxygen from the cylinder to the torch are usually _____.

a)

red

b)

blue

c)

green

d)

orange

12.

The special cutting tip for cutting off bolt heads and nuts is called a ______.

a)

gouging tip

b)

flue cutting tip

c)

rivet cutting tip

d)

piercing tip

13.

The selection of a cutting torch tip depends on the thickness of the base metal being cut and the ___ .

a)

size of the fuel hoses

b)

size of the torch

c)

type of fuel gas being used

d)

size of the oxygen cylinder

14.

Tip cleaners are ___.

a)

strong detergents used to dissolve carbon buildup in torch tips

b)

small round files used to remove impurities from a torch tip

c)

solvent tanks and pumps used to force solvent through the tip openings

d)

high-velocity nozzles used to blow debris from a torch tip

15.

A track burner is a device used to ____.

a)

cut railroad tracks

b)

weld pipe

c)

cut or bevel in a straight line

d)

cut holes in plate

16.

How should gas cylinders be transported to a workstation?

a)

Carried by hand with one worker on each end of the cylinder

b)

Lying flat in a cylinder cart or truck

c)

Rolled carefully by a qualified worker from the storage area

d)

In an upright position on a hand truck or bottle cart

17.

What devices are often attached to the regulators, the torch, or both?

a)

Flashback arrestors

b)

Needle valves

c)

Cutting orifices

d)

Leak detectors

18.

An oxyfuel cutting torch should be checked for leaks .

a)

each time it is used

b)

once a week

c)

every month

d)

after 1,000 hours

19.

A cutting flame that has an excess of oxygen is called a(n) .

a)

cold flame

b)

neutral flame

c)

carburizing flame

d)

oxidizing flame

20.

A carburizing flame has a white feather created by .

a)

too much oxygen

b)

too little carbon

c)

too much fuel

d)

too much vacuum

21.

What can occur when a torch tip or nozzle touches the work surface or when a bit of hot dross briefly interrupts the cutting flame?

a)

Carburization

b)

Backfire

c)

Oxidation

d)

Flashpoint

22.

When a cutting job is completed and the oxyfuel equipment is no longer needed, the first step in shutting down the oxyfuel cutting equipment is to .

a)

close the fuel gas cylinder valve

b)

back out the fuel gas and oxygen regulator adjusting screws

c)

open the fuel gas torch valve

d)

open the oxygen torch valve

23.

When an empty cylinder has been removed from the workstation and stored, it must be marked MT (or the acceptable site notation for indicating an empty cylinder) _______.

a)

near its top

b)

on the middle of its side

c)

on its bottom

d)

on its lower third

24.

Insufficient preheat during an oxyfuel cutting operation is likely to result in ____.

a)

the top surface melting over the cut

b)

bad gouging at the bottom of the cut

c)

a pronounced break in the drag line

d)

a wavy and irregular kerf

25.

To minimize distortion when cutting thin steel, ___ .

a)

avoid preheating the metal before starting the cut

b)

keep the cutting tip perpendicular to the metal's surface

c)

move as quickly as possible without losing the cut

d)

preheat the metal until it is near its melting point

26.

When cutting thin steel with oxyfuel cutting equipment, point the torch tip in the direction the torch is traveling at a .

a)

10- to 12-degree angle

b)

15- to 20-degree angle

c)

21- to 25-degree angle

d)

30- to 35-degree angle

27.

What becomes less of a problem as the thickness of the steel being cut increases?

a)

Distortion

b)

Blowback

c)

Backfire

d)

Piercing

28.

The process of cutting a groove into a surface is known as ___.

a)

gouging

b)

washing

c)

brushing

d)

short-cutting

29.

Gouging operations use a special tip that produces a low-velocity stream of oxygen that ___ .

a)

blows downward

b)

pierces the workpiece

c)

distorts the flame

d)

curves upward

30.

Portable oxyfuel track burners can be used for ___

a)

stationary cutting, but not bevel cutting

b)

straight-line cutting and bevel cutting

c)

movable cutting, but not straight-line cutting

d)

both drag cutting and kerfless cutting

NCCER Oxy Fuel Cutting - Module 2

Total questions: 30

Worksheet time: 23mins

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