Question 1

Explain how an alternating welding current can be converted to a direct current.

Accepted Answer

Alternating welding current can be converted to direct current by using a series of rectifiers. A rectifier allows current to flow in one direction only. If one rectifier is added, it would be difficult to weld. A series of rectifiers, known as a bridge rectifier, can modify the alternating current. Rectifiers become hot as they change AC to DC. They must be attached to a heat sink and cooled by having air blown over them. The heat produced by a rectifier reduces the power efficiency of the welding machine. At the same dial settings for AC and DC, the DC is at a lower amperage. The difference in amperage (power) is due to heat lost in the rectifiers. The loss in power makes operation with AC more efficient and less expensive compared to DC.

Question 2

The shielded metal arc welding machine's voltage output ____ as its current ____.

Accepted Answer

A)  decreases, decreases 
B)  increases, increases 
C)  increases, decreases 
D)  decreases, increases 
A)  decreases, decreases 
B)  increases, increases 
C)  increases, decreases 
D)  decreases, increases D

Question 3

The unit of measure of electrical flow is ____________.

Accepted Answer

A)  volts 
B)  amps 
C)  watts 
A)  volts 
B)  amps 
C)  watts B

Question 4

Give an overview of the process of shielded metal arc welding.

Accepted Answer

Shielded metal arc welding (SMAW) is a w

Question 5

Explain how generators and alternators work, and describe the similarities and differences between them.

Accepted Answer

Generators and alternators both produce

Question 6

____________________ is the measurement of the total number of electrons flowing.

Accepted Answer

The answer of ____________________ is the measurement of the total...

Question 7

The unit of measure of electrical pressure is ______________.

Accepted Answer

A)  volts 
B)  amps 
C)  watts 
A)  volts 
B)  amps 
C)  watts

Question 8

Explain what magnetic flux lines are and how they may cause a wire to move when welding with very high amperages.

Accepted Answer

When electrons flow they create lines of

Question 9

A work clamp ____.

Accepted Answer

A)  may have power losses that should be ignored 
B)  reduces welding efficiency 
C)  must not clamp too tightly to the material 
D)  should be carefully touched occasionally to determine if it is hot 
A)  may have power losses that should be ignored 
B)  reduces welding efficiency 
C)  must not clamp too tightly to the material 
D)  should be carefully touched occasionally to determine if it is hot

Question 10

What is the name for the process used to increase the current if the arc gets too short?

Accepted Answer

A)  Dig 
B)  Arc Force Control 
C)  Arc Force 
D)  All of the above 
A)  Dig 
B)  Arc Force Control 
C)  Arc Force 
D)  All of the above

Question 11

The negative side of an electrode arc is called a(n) ____________________.

Accepted Answer

The answer of The negative side of an electrode arc...

Question 12

The unit of measure of electrical power is ____________.

Accepted Answer

A)  volts 
B)  amps 
C)  watts 
A)  volts 
B)  amps 
C)  watts

Question 13

In alternators the welding current is produced on the ____.

Accepted Answer

A)  brushes 
B)  diode 
C)  armature 
D)  stator 
A)  brushes 
B)  diode 
C)  armature 
D)  stator

Question 14

Temperature is the measurement of ________ energy in a material.

Accepted Answer

A)  voltage 
B)  mechanical 
C)  electrical 
D)  thermal 
A)  voltage 
B)  mechanical 
C)  electrical 
D)  thermal

Question 15

____ controls the size of the arc.

Accepted Answer

A)  Voltage 
B)  Amperage 
C)  Heat 
D)  Wattage 
A)  Voltage 
B)  Amperage 
C)  Heat 
D)  Wattage

Question 16

The heat produced by a rectifier ____.

Accepted Answer

A)  leads to a higher amperage in DC than AC 
B)  reduces the power efficiency of the welding machine 
C)  increases the power efficiency of the welding machine 
D)  can be recycled in a heat sink to provide power to other machines 
A)  leads to a higher amperage in DC than AC 
B)  reduces the power efficiency of the welding machine 
C)  increases the power efficiency of the welding machine 
D)  can be recycled in a heat sink to provide power to other machines

Question 17

A(n) ____________________ allows current to flow in one direction only.

Accepted Answer

The answer of A(n) ____________________ allows current to flow in...

Question 18

The positive side of an electrode arc is called a(n) ____________________.

Accepted Answer

The answer of The positive side of an electrode arc...

Question 19

Inverter welders may have transformers as light as ____________.

Accepted Answer

A)  35 lb (16 kg) 
B)  2.2 lb (1 kg) 
C)  17 lb (7.7 kg) 
D)  7 lb (3 kg) 
A)  35 lb (16 kg) 
B)  2.2 lb (1 kg) 
C)  17 lb (7.7 kg) 
D)  7 lb (3 kg)

Question 20

Electrons flow through a conductor ____.

Accepted Answer

A)  from negative to positive 
B)  from positive to negative 
C)  from negative to negative 
D)  from positive to positive 
A)  from negative to positive 
B)  from positive to negative 
C)  from negative to negative 
D)  from positive to positive

Exam 3: Shielded Metal Arc Equipment, Setup, and Operation

Explain how an alternating welding current can be converted to a direct current.

The shielded metal arc welding machine's voltage output ____ as its current ____.

The unit of measure of electrical flow is ____________.

Give an overview of the process of shielded metal arc welding.

Explain how generators and alternators work, and describe the similarities and differences between them.

____________________ is the measurement of the total number of electrons flowing.

The unit of measure of electrical pressure is ______________.

Explain what magnetic flux lines are and how they may cause a wire to move when welding with very high amperages.

A work clamp ____.

What is the name for the process used to increase the current if the arc gets too short?

The negative side of an electrode arc is called a(n) ____________________.

The unit of measure of electrical power is ____________.

In alternators the welding current is produced on the ____.

Temperature is the measurement of ________ energy in a material.

____ controls the size of the arc.

The heat produced by a rectifier ____.

A(n) ____________________ allows current to flow in one direction only.

The positive side of an electrode arc is called a(n) ____________________.

Inverter welders may have transformers as light as ____________.

Electrons flow through a conductor ____.

Introduction to Welding

Safety in Welding

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

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, 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

Filters

The shielded metal arc welding machine's voltage output as its current .