Deck 9: Related Cutting Processes

Question 1

The light from a laser travels in ____ waves.

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

Answer 1

B

Question 2

____ gases react with the material being cut.

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

Answer 2

C

Question 3

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

Answer 3

A

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 drilling operations use a ____ laser.

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

Question 6

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 7

Most laser welding and cutting operations use a ____ laser.

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

Question 8

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

Question 9

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 10

Most lasers range from ____ watts in power.

A) 200 to 800
B) 400 to 1200
C) 400 to 1500
D) 800 to 1500

Question 11

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 12

____ gases do not add any heat to the cutting process.

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

Question 13

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 14

The carbon arc cutting process was developed in the ____.

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

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

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 17

Which of the following is true of laser light?

A) It cannot be treated as any other light.
B) It cannot be reflected.
C) It cannot be defused.
D) It remains in a very tight column without spreading out.

Question 18

The early lasers all used ____ as the material that produced the laser light.

A) tungsten gas
B) a synthetic crystal rod
C) argon gas
D) a synthetic ruby rod

Question 19

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 20

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

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

Question 21

​Laser beam drilling can drill holes as small as ______________.

A) ​0.0001 in (0.0025 mm)
B) ​0.01 in (0.25 mm)
C) ​0.05 in (1.27 mm)
D) ​1/16 in (1.58 mm)

Question 22

​When are air carbon arc cutting electrodes that connect normally required?

A) ​For overhead gouging to make the electrodes longer so you are out of the way of falling sparks.
B) ​When gouging inside of a pipe or cylinder so the area being gouged can be reached.
C) ​For track-type cutting operations.
D) ​All of the above.

Question 23

A laser is a form of light that is ____________________.

Question 24

Unlike the oxyfuel process, the air carbon arc cutting process ____.

A) requires that the base metal be reactive with the cutting stream
B) can only be performed on metals that can be rapidly oxidized by the cutting stream
C) can not be performed on metals that can be rapidly oxidized by the cutting stream
D) does not require that the base metal be reactive with the cutting stream

Question 25

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

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

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

A) ​20 and 40
B) ​80 and 100
C) ​100 and 120
D) ​120 and 200

Question 28

​What process can be combined with a laser beam to apply a surface cladding on a part?

A) ​SAW
B) ​FCAW
C) ​SMAW
D) ​GMAW

Question 29

Which of the following is a difference between an electrode holder and an air carbon arc torch?

A) The lower electrode jaw has a series of air holes.
B) The jaw has more than one electrode-locating groove.
C) The electrode jaw cannot pivot.
D) There is no air valve on the torch lead.

Question 30

​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 31

​What two welding processes can be combined with LBW to form the Hybrid Laser Process.

A) ​SMAW and TB
B) ​GMAW and GTAW
C) ​FCAW and EGW
D) ​PAW and SAW

Question 32

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

Question 33

​What is the term for the process of removing a large area of metal from a surface?

A) ​hard surfacing
B) ​surfacing
C) ​washing
D) ​gouging

Question 34

​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 35

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

A) 20 and 40
B) 80 and 100
C) 100 and 120
D) 120 and 200

Question 36

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 37

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

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

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

Question 40

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 41

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

Question 42

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

Question 43

Explain how a pulsed laser is used to drill holes.

Question 44

Discuss two applications of oxygen lance cutting.

Question 45

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 46

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

Question 47

Explain the process of oxygen lance cutting.

Question 48

Compare nonreactive gases and exothermic gases.

Question 49

Explain how laser light is produced.

Question 50

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