Final Flashcards

1
Q

OCPD

A

Over current protection device

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2
Q

2 types of AC circuits

A

Single and three phase

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3
Q

Current imbalance to trip a GFCI

A

3-5mA

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4
Q

DMM rating for an industrial setting

A

Cat 3

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5
Q

Hot bus to neutral in residential setting

A

120VAC

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6
Q

Symbol for LED

A

Can draw it on here but know it :)

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7
Q

NEMA

A

National electrical manufacturers association

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8
Q

Symbol for ground

A

Can’t draw it on here but know it :)

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9
Q

Tongs on your meter are used for?

A

Finding Amperage

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10
Q

Load center

A

Central location that distributes power throughout a building.

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11
Q

Breaker for 10 gauge wire

A

30 amp

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12
Q

What load consumes most energy

A

Electrical motors

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13
Q

Single phase is what

A

When you lose one phase of a 3 phase motor

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14
Q

What breaker is used for a light circuit

A

15 amp

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15
Q

What should you read when ringing out a good fuse

A

0.1 ohms or above (continuity)

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16
Q

ESD

A

Electrostatic discharge

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17
Q

What steps down from 480V to 240V

A

Transformer

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18
Q

Shows length, height, and depth in one view

A

Pictorial drawing

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19
Q

Red box

A

480 VAC

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20
Q

Phase to ground in 480 box should read

21
Q

What should you read when you meter a good fuse

22
Q

Colors for high voltage is US

A

Brown, orange, yellow (BOY)

23
Q

5 things that make a circuit

A

Load, wire, switch, source voltage, and a breaker or fuse

24
Q

Ghost voltage

A

Voltage in the air from magnetism

25
Hot side of a receptacal
Short side
26
What protects a motor when starting and running
Fuse (starting) Overload (running)
27
North American waves around globe
60 times per second
28
Symbol for fuse
Can’t draw it on here but know it :)
29
Circuit that needs to be started by a person
Manual circuit
30
IEC
International electrotechnical commission
31
How to switch the rotation of a motor
Change any 2 of the 3 leads
32
What should you do before coupling and starting up a new motor
Bump test
33
What should you do before starting any repairs
Check for source voltage
34
Solenoid
Electrical component that converts electrical to linear mechanical force
35
NFPA70E
50V
36
Black box
250VDC
37
Diagram that shows the circuit
Ladder diagram
38
Diode
Flow in one direction
39
Electromagnetism
Magnetism from an electrical current passing through a conductor
40
Resistance and current are?
Proportional. One goes up other goes down
41
2 types of current
AC and DC
42
Most used fossil fuel for electric power
Coal
43
NO and NC mean
Normally open and normally closed
44
3 ways to increase magnetism
Increase voltage Add an iron core Add more windings
45
Bold lines in a print
Power circuit
46
Thin lines in a print
Control circuit
47
How many recepticals on a 20 amp circuit
10
48
What keeps a motor running after you let go of the start button
Seal in tips
49
DMM
Digital multimeter