Question 1

The temperature of an unrestricted arc is about ____ degrees Fahrenheit.

Accepted Answer

A)  1,000 
B)  11,000 
C)  43,000 
D)  110,000 
A)  1,000 
B)  11,000 
C)  43,000 
D)  110,000

Question 2

​When air is used for the plasma gas, it must be clean and dry so a ______ must be used.

Accepted Answer

A)  ​filter dryer 
B)  ​strainer and dust collector 
C)  ​clear plastic hose so you can see any dirt 
D)  ​short as possible hose 
A)  ​filter dryer 
B)  ​strainer and dust collector 
C)  ​clear plastic hose so you can see any dirt 
D)  ​short as possible hose

Question 3

​What metals can produce poisonous metal fumes that must be collected in a fume collection system to prevent air pollution?

Accepted Answer

A)  ​cadmium 
B)  ​zinc 
C)  ​chromium 
D)  ​All of the above 
A)  ​cadmium 
B)  ​zinc 
C)  ​chromium 
D)  ​All of the above

Question 4

A(n) ____________________ is used to reduce the noise level, control the plasma light, trap the sparks, eliminate most of the fume hazard, and reduce distortion.

Accepted Answer

The answer of A(n) ____________________ is used to reduce the...

Question 5

The voltage required for plasma arc processes range from ____ open circuit.

Accepted Answer

A)  18 to 45 volts 
B)  150 to 400 volts 
C)  400 to 600 volts 
D)  600 to 1000 volts 
A)  18 to 45 volts 
B)  150 to 400 volts 
C)  400 to 600 volts 
D)  600 to 1000 volts

Question 6

Explain Ohm's Law, and use Ohm's Law to calculate the number of watts used for an electrode operating at 18 volts and 90 amps.

Accepted Answer

Ohm's Law states that the watts used in

Question 7

​Some small plasma cutting machines have ______ and can be used on 120V power.

Accepted Answer

A)  ​self-contained air compressors 
B)  ​an argon cylinder for a shielding gas 
C)  ​an oxygen cylinder for cutting gasses 
D)  ​Both b and c are correct 
A)  ​self-contained air compressors 
B)  ​an argon cylinder for a shielding gas 
C)  ​an oxygen cylinder for cutting gasses 
D)  ​Both b and c are correct

Question 8

​What tip material is resistant to oxidation at high temperatures?

Accepted Answer

A)  ​tungsten 
B)  ​hafnium 
C)  ​copper 
D)  ​brass 
A)  ​tungsten 
B)  ​hafnium 
C)  ​copper 
D)  ​brass

Question 9

High-powered plasma cutting machines have amperages as high as ____ amps, and some very large automated cutting machines may have 1000-ampere capacities.

Accepted Answer

A)  100 
B)  200 
C)  500 
D)  800 
A)  100 
B)  200 
C)  500 
D)  800

Question 10

Explain what happens when standoff distance increases.

Accepted Answer

This distance is very critical to produc

Exam 8: Plasma Arc Cutting

The temperature of an unrestricted arc is about ____ degrees Fahrenheit.

​When air is used for the plasma gas, it must be clean and dry so a ______ must be used.

​What metals can produce poisonous metal fumes that must be collected in a fume collection system to prevent air pollution?

A(n) ____________________ is used to reduce the noise level, control the plasma light, trap the sparks, eliminate most of the fume hazard, and reduce distortion.

The voltage required for plasma arc processes range from ____ open circuit.

Explain Ohm's Law, and use Ohm's Law to calculate the number of watts used for an electrode operating at 18 volts and 90 amps.

​Some small plasma cutting machines have ______ and can be used on 120V power.

​What tip material is resistant to oxidation at high temperatures?

High-powered plasma cutting machines have amperages as high as ____ amps, and some very large automated cutting machines may have 1000-ampere capacities.

Explain what happens when standoff distance increases.

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

Related Cutting Processes

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, Operation, and Filler Metals

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 of Welds

Welding Metallurgy

Weldability of Metals

Filler Metal Selection

Welding Automation and Robotics

Other Welding Processes

Oxyfuel Welding and Cutting Equipment, Setup, and Operation

Oxyacetylene Welding

Brazing, Braze Welding, and Soldering

Filters

When air is used for the plasma gas, it must be clean and dry so a ______ must be used.

What metals can produce poisonous metal fumes that must be collected in a fume collection system to prevent air pollution?

Some small plasma cutting machines have ______ and can be used on 120V power.

What tip material is resistant to oxidation at high temperatures?