Chapter 24

Question 1

True or False

Oxyacetylene cutting applications cannot be applied to copper, aluminum, or high-nickel alloys.

Answer 1

True

Question 2

When cleaning the cutting tip, which motion should be used?

up and down with a twisting motion

up and down

twisting

Answer 2

up and down

Question 3

Oxyacetylene cutting can be used on all carbon steels up to _____% carbon.

0.70

0.05

0.45

0.25

Answer 3

0.25

Question 4

What term is defined as being a rapid oxidation or burning of metal at high temperature?

oxyacetylene cutting

torching

jet cutting

oxidation

Answer 4

oxyacetylene cutting

Question 5

On a cutting tip, the ______ center orifice permits the jet action of pure oxygen while the _____ holes direct the mixed gases into the preheat flame

small, larger

larger, small

Answer 5

larger, small

Question 6

How far above the metal should the preheat cone be when cutting with oxyacetylene?

3/8” - 1/2”

1/4” - 1/2”

1/8” - 1/4”

1/16” - 1/8”

Answer 6

1/16” - 1/8”

Question 7

How far above the cutting surface should you keep the tip of the torch?

1/4” to 5/16”

1/8” to 3/16”

3/8” to 7/16”

1/2” to 9/16”

Answer 7

1/8” to 3/16”

Question 8

When shutting down the cutting torch, which gas do you turn off first?

Oxygen

Acetylene

Answer 8

Oxygen

Question 9

What is the best shade lens to use with a cutting torch?

5-7

12-13

3-4

8-11

Answer 9

3-4

Question 10

What happens to the sound of the torch when you have the oxygen turned up too much?

It gets louder

It starts popping

It gets quieter

Answer 10

It gets louder

Question 11

When starting your torch, which knob do you open first?

Oxygen

Acetylene

Both acetylene and oxygen

Answer 11

Acetylene

Question 12

When adjusting the regulators for the torch, set the acetylene to ___ psi and the oxygen to ___ psi.

10, 25

5, 90

7, 40

Answer 12

7, 40

Question 13

What are the three knobs on the torch for?

2 are for acetylene control and 1 is for oxygen

1 is for acetylene, 1 is for oxygen, and 1 is an emergency shut-off knob

2 are for oxygen control and 1 is for acetylene

Answer 13

2 are for oxygen control and 1 is for acetylene

Question 14

True or False

The threads on the oxygen regulator are right-handed, while the acetylene regulator is left-handed to prevent any mix ups.

Answer 14

True

Question 15

Why is tilting the torch tip during cutting important?

It prevents the tip from sticking to the metal

It helps cut a straighter edge

It preheats the metal

Answer 15

It preheats the metal

Question 16

What is the width of material that is removed during the cutting process called?

Slag

Kerf

Shards

Shavings

Answer 16

Kerf