Deck 9: Related Cutting Processes

Question 1

____ gases react with the material being cut.

A) Cutting assist
B) Nonreactive
C) Exothermic
D) Nitrogen

Answer 1

C

Question 2

The highest continuous power output-type lasers are the ____ type.

A) solid state
B) YAG
C) ruby
D) gas

Answer 2

D

Question 3

The power of most lasers is ____ other welding processes.

A) somewhat greater than
B) about the same as
C) relatively small compared to
D) significantly greater than

Answer 3

C

Question 4

Today the most popular solid laser is the ____.

A) neodymium-doped, yttrium aluminum garnet
B) ruby rod
C) glass rod
D) nitrogen

Question 5

Most laser welding and cutting operations use a ____ laser.

A) solid state
B) YAG
C) gas
D) synthetic ruby

Question 6

The laser light is bounced between ____ and ____.

A) one fully reflective surface, one partially reflective surface
B) one fully reflective surface, another fully reflective surface
C) one partially reflective surface, another partially reflective surface
D) one reflective surface, one non-reflective surface

Question 7

The power density of a cutting laser can be equal to ____ watts per square inch.

A) 25
B) 100,000
C) 1 million
D) 65 million

Question 8

Laser equipment is ____ most other welding or cutting power supplies.

A) larger than
B) smaller than
C) significantly smaller than
D) about the same size as

Question 9

The air carbon arc cutting process was developed in the ____.

A) 1930s
B) 1940s
C) 1950s
D) 1960s

Question 10

What are some types of materials that can be cut using one of the related cutting processes?

A) glass and plastic
B) printed circuit boards
C) cloth and fiberglass insulation
D) All of the above

Question 11

The air supplied to the torch should be between ____ psi.

A) 20 and 40
B) 4 0 and 100
C) 100 and 120
D) 120 and 200

Question 12

Most laser drilling operations use a ____ laser.

A) solid state
B) YAG
C) gas
D) synthetic ruby

Question 13

The absorption rate will ____ for any material once the laser beam begins to heat the surface.

A) decrease
B) stay the same
C) increase
D) double

Question 14

Which of the following is true of water jet cutting?

A) It is a thermal process.
B) The cut is made by the rapid erosion of the material by a high-pressure jet of water.
C) The process is not suited for use on thin materials.
D) The process is not suited for heat-sensitive materials.

Question 15

With laser cutting, the part that is being cut ____.

A) must be electrically conductive
B) may not be made of glass, quartz, or plastic
C) need not be electrically conductive
D) must be made of glass, quartz, or plastic

Question 16

In air carbon arc cutting, the air must be aimed ____ the electrode.

A) just under and behind
B) just above and behind
C) just under and ahead of
D) just above and ahead of

Question 17

Which of the following is an advantage of laser cutting?

A) Wider kerf
B) Wider heat-affected zone
C) Top edge will be smooth and rounded
D) No electrical conductivity is required

Question 18

Lasers are used for precision tasks like aiming weapons or scanning bar codes because ____.

A) they generate a large amount of energy
B) they can be treated as any other type of light
C) the beam is not adversely affected by its travel
D) it is monochromatic

Question 19

The light from a laser travels in ____ waves.

A) multiple frequency
B) parallel
C) white light
D) chromatic

Question 20

Which of the following is a problem with high-powered solid lasers?

A) They produce less energy.
B) The internal temperatures increase with operation time.
C) They lose power with operation time.
D) They are more diffuse.

Question 21

What cutting process do fire and rescue personnel use to cut steel beams and concrete?

A) OLC
B) PAC
C) CAC-A
D) LBC

Question 22

Which of the following is an advantage of laser beam welding?

A) The highly focused laser beam works well on larger, thicker parts.
B) The low-voltage electric current rarely damages sensitive electronic parts.
C) Slow localized heating results in little power distortion.
D) The laser's high welding speeds produce narrow heat-affected zones.

Question 23

The ____________________ can either be a nonreactive gas or an exothermic.

Question 24

Explain the process of oxygen lance cutting.

Question 25

A(n) ____________________ laser is the best choice for drilling operations.

Question 26

The operating voltage required for air carbon arc welding is ___________.

A) 35 volts or higher
B) 18 volts or higher
C) 120 volts or 240 volts
D) 24 volts or lower

Question 27

Most laser beam welding is performed on ____________________ material.

Question 28

When using water jet cutting, ____________________ is not a problem when cutting composite or laminated materials such as carbon fibers, resins, or computer circuit boards.

Question 29

Photo energy produced by laser light is converted to ____________________ energy as it strikes the surface of a material.

Question 30

Compare nonreactive gases and exothermic gases.

Question 31

The ____________________ laser is capable of generating the highest-powered laser pulses.

Question 32

The DCEP electrodes are the most commonly used and are made of carbon in the form of ____________________.

Question 33

Explain how a pulsed laser is used to drill holes.

Question 34

The ability of a material's surface to absorb or reflect the laser light affects the laser's operating ____________________.

Question 35

____________________ is the process sometimes used to remove large areas of metal so that hard surfacing can be applied.

Question 36

Explain how laser light is produced.

Question 37

Discuss two applications of oxygen lance cutting.

Question 38

What is used to remove the material from a hole being drilled with a laser?

A) A jet of clean dry compressed air blasts the molten metal out of the hole.
B) Laser drilling is always done overhead so the molten metal will run out of the hole.
C) The intense heat vaporizes the spot with enough force to thrust the material out.
D) The laser is hot enough so that it passes through the molten metal until the hole is completed and then the molten metal drips out.

Question 39

A laser is a form of light that is ____________________.

Question 40

As the light is reflected at the ends of the lasing material, it begins to form a(n) ____________________ wave form.