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Alberta Welding 1st year > Electricity > Flashcards

Electricity Flashcards

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1
Q 
This term describes a noisy, uncontrollable arc that flares from side to side
A)Arc voltage
B)Arc blow
C)Inductance
D) Resistance
A

B)Arc blow

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2
Q 
This term describes the influence exerted by a magnetic field on neighbouring bodies without physical contact
A)Voltage
B)Amperage
C)Frequency
D) Inductance
A

D) Inductance

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3
Q 
This is the Fundamental unit of electricity that moves through a conductor when current is flowing
A)Resistors
B)Electrons
C)Conductors
D) Rectifiers
A

B)Electrons

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4
Q 
What term describes the NEMA rating of a welding machine
A)Duty cycle
B)Direct current
C)Arc voltage
D) Amperage
A

A)Duty cycle

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5
Q 
Electrode positive means
A)Straight polarity
B)Reverse polarity
C)AC transformer
D) Alternating current
A

B)Reverse polarity

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6
Q 
Electrons have a… Charge
A)Neutral
B)12 V
C)Positive
D) Negative
A

D) Negative

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7
Q 
Which term measures the strength of a current of electricity
A)Amperage
B)Voltage
C)Electron
D) Inductance
A

A)Amperage

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8
Q 
What term describes a medium that provides an electrical parts for current to flow through
A)Cycle
B)Circuit
C)Conductor
D) Core
A

C)Conductor

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9
Q

The electron flow theory states that electrons move from
A) Positive to negative
B)Negative to positive

A

B)Negative to positive

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10
Q 
This term describes a material that can stop current flow through its self
A)Inductor
B)Inverter
C)Conductor
D) Insulator
A

D) Insulator

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11
Q 
Which term describes the voltage output of the machine during welding
A)Arc rectification
B)Arc blow
C)Arc voltage
D) Inductance
A

C)Arc voltage

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12
Q 
When current flows through a coil wrapped around an iron core what is created?
A)A magnetic field
B)Reverse polarity
C)Transformer rectifier
D) Duty cycle
A

A)A magnetic field

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13
Q 
This device in a welding machine is designed to have a certain number of turns of wire
A)Circuit
B)Core
C)Coil
D) Cycle
A

C)Coil

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14
Q 
The main function of this device is to change AC to DC
A)Resistor
B)Rectifier
C)Relay
D) Reactor
A

B)Rectifier

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15
Q 
Electrode negative is:
A)Straight polarity
B)Reverse polarity
C)AC transformer
D) Alternating current
A

A)Straight polarity

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16
Q 
This current flows in one direction only and has either a positive or negative value.
A)Direct current
B)Alternating current
C)Open circuit voltage
D) Arc voltage
A

A)Direct current

17
Q 
What term describes a piece of equipment used to create electricity of sufficient volume for welding?
A)Inductor
B) Resistor
C)Transformer
D) Generator
A

D) Generator

18
Q 
Which is a graphical illustration that plots the relationship between voltage and amperage output of a welding power source?
A)Open circuit voltage 
B)Volt-amp curve
C)Electromotive force
D) Duty cycle
A

B)Volt-amp curve

19
Q 
When no current is flowing in the circuit but the machine is turned on you can measure the:
A)Open circuit voltage
B)Constant current
C)Alternating current
D) Volt-amp curve
A

A)Open circuit voltage

20
Q 
The speed at which a C changes direction is called the:
A)Voltage
B)Amperage
C)Frequency
D) Resistance
A

C)Frequency

21
Q 
This term describes the property of an electrical conductor that opposes the flow of current
A)Resistance
B)Inductance
C)Voltage
D) Amperage
A

A)Resistance

22
Q 
In welding, this term describes what is created when there is enough amperage and voltage overcoming the natural resistance to the flow of the electricity.
A)Amp
B)Volt
C)Cycle
D) Arc
A

D) Arc

23
Q 
What phase of power supplies most industrial applications
A)Single phase power
B)To phase power
C)Three phase power
D) For phase power
A

C)Three phase power

24
Q 
This welding machine transforms AC to DC.
A)Line transformer
B)Transformer rectifier
C)DC generator
D) AC transformer
A

D) AC transformer

25
Q 
This term describes one complete revolution of the AC alternator
A)Circuit
B)Core
C)Coil
D) cycle
A

D) cycle

26
Q 
What happens when mechanical energy is applied to a conductor and moves across the magnetic lines of force in a magnetic field
A)Magnetism is generated
B)Electrical current is generated
C)Single phase power is generated
D) Three phase power is generated
A

B)Electrical current is generated

27
Q 
What is an advantage of an inverter welding machine
A)Small and light weight
B)Generally cheaper to buy
C)Portability
D) Function well in a dirty environment
A

A)Small and light weight

28
Q

What is a disadvantage of an inverter welding machine?
A)Poor arc starting characteristics
B)Higher input power requirements
C)Hire initial cost than transformers or rectifiers
D) Cannot be configured for automation

A

C)Hire initial cost than transformers or rectifiers

Alberta Welding 1st year (28 decks)

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