Question 1

Explain how a pulsed laser is used to drill holes.

Accepted Answer

The pulsed laser is the best choice for drilling operations. A very short burst of high laser energy is concentrated on a small spot. The intense heat vaporizes the small spot with enough force to thrust the material out, leaving a small crater. The repeated blasting to the pulsed laser results in the crater becoming increasingly deeper. This process continues until the hole is drilled through the part or to a desired depth.

Question 2

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

Accepted Answer

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 
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 C

Question 3

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

Accepted Answer

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. 
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. D

Question 4

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

Accepted Answer

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

Question 5

Which of the following is an advantage of laser cutting?

Accepted Answer

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

Question 6

Most laser beam welding is performed on ____________________ material.

Accepted Answer

The answer of Most laser beam welding is performed on...

Question 7

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

Accepted Answer

The answer of When using water jet cutting, ____________________ is...

Question 8

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

Accepted Answer

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 
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 9

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

Accepted Answer

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

Question 10

Compare nonreactive gases and exothermic gases.

Accepted Answer

Nonreactive gases do not add any heat to

Question 11

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

Accepted Answer

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

Question 12

____ gases react with the material being cut.

Accepted Answer

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

Question 13

Explain how laser light is produced.

Accepted Answer

A laser is a form of light that is monoc

Question 14

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

Accepted Answer

The answer of The ____________________ can either be a nonreactive...

Question 15

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

Accepted Answer

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

Question 16

Most laser drilling operations use a ____ laser.

Accepted Answer

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

Question 17

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

Accepted Answer

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. 
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 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

The answer of The ____________________ laser is capable of generating...

Question 20

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

Accepted Answer

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

Exam 9: Related Cutting Processes

Explain how a pulsed laser is used to drill holes.

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

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

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

Which of the following is an advantage of laser cutting?

Most laser beam welding is performed on ____________________ material.

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

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

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

Compare nonreactive gases and exothermic gases.

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

____ gases react with the material being cut.

Explain how laser light is produced.

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

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

Most laser drilling operations use a ____ laser.

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

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

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

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

Introduction to Welding

Safety in Welding

Shielded Metal Arc Equipment, Setup, and Operation

Shielded Metal Arc Welding of Plate

Shielded Metal Arc Welding of Pipe

Shielded Metal Arc Welding Aws Sense Certification

Flame Cutting Equipment, Setup, and Operation

Plasma Arc Cutting Equipment, Setup, and Operation

Gas Metal Arc Welding Equipment, Setup, and Operation

Gas Metal Arc Welding

Flux Cored Arc Welding Equipment, Setup, and Operation

Flux Cored Arc Welding

Gas Metal Arc and Flux Cored Arc Welding of Pipe

Gas Metal Arc and Flux Cored Arc Welding Aws Sense Certification

Gas Tungsten Arc Welding Equipment, Setup, and Operation

Gas Tungsten Arc Welding of Plate

Gas Tungsten Arc Welding of Pipe

Gas Tungsten Arc Welding Plate and Pipe Aws Sense Certification

Shop Math and Weld Cost

Reading Technical Drawings

Welding Joint Design and Welding Symbols

Fabricating Techniques and Practices

Welding Codes and Standards

Testing and Inspection

Welding Metallurgy

Weldability of Metals

Filler Metal Selection

Welding Automation and Robotics

Other Welding Processes

Oxyfuel Welding Equipment, Setup, and Operation

Oxyacetylene Welding and Brazing, Braze Welding, and Soldering

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