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Module 4, Lesson 3 > ITEC 271 Final > Flashcards

ITEC 271 Final Flashcards

1
Q

Electrical safety problems

A

Fires, burns, and death

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2
Q

Death can occur in two ways

A

Direct (electrocution) and indirect (falls)

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3
Q

Causes of electrical safety problems

A

Lack of knowledge, can’t see it, one of the most common in construction

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4
Q

9 -10 house fires are what kind of fires

A

Electrical fires

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5
Q

Voltage represents

A

Volts - electromotive force

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6
Q

Current represents

A

Amps - intensity

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7
Q

Resistance represents

A

Ohms - resistance

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8
Q

Is current or voltage the killer

A

Current is the killer

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9
Q

Electrical system comparison to a water system

A

Voltage = pressure (P.S.I), current = Quantity (G.P.M.), and resistance = nozzle on the hose

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10
Q

Define conductor

A

Carry electricity

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11
Q

Define Insulator

A

Does not carry electricity (high resistance)

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12
Q

Define circuit

A

Must be complete path for current to travel in

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13
Q

5 factors affecting extent of harm

A
  1. Amount of current (amps) 2. Path of current 3. Length of time 4. “Grounding” can eliminate the problem
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14
Q

Path of current characteristics

A

Finger to finger = minimal hazard and arm to arm/arm to leg = heart muscles being affected

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15
Q

Length of time characteristics

A

1-2 seconds can cause the heart harm, remove victim from the source, remove source from the victim, DO NOT touch the victim (use a stick), and begin CPR

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16
Q

A ground example

A

3-prong adapter

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17
Q

Current through a resistance generates what

A

Heat (internal burns)

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18
Q

Turn off power at

A

Switch box or fuse box

19
Q

Capacitors perform what function

A

Store current

20
Q

How man hands should be used when replacing fuses

A

1 hand, use rubber mats, and insulated tools (fuse pullers)

21
Q

Rings and watches are considered what `

A

Conductors

22
Q

Prevention characteristics

A

All wiring should be to N.E.C. standard, plug items direct (no extension cords), observe insulation on wire, lock fuse boxes during repair, and grasp plug, not cord

23
Q

The longer the extension cord……

A

The larger the wire (no insulation)

24
Q

Plugs are the most common what

A

Problem

25
Q

Which side of an outlet is the hot side

A

The smaller slot that is represented by gold screws

26
Q

Which color wire attaches to the hot side

A

Black wire

27
Q

What wire connects to the silver screws of the larger slot

A

White wire

28
Q

A 3-way switch might have this type of wire

A

Common wire

29
Q

Ceramic fixture characteristics

A

It does not matter where you hook the white and black wires

30
Q

Limn Pliers characteristics

A

Used to cut romex and sheath wiring

31
Q

Wire stripper characteristics

A

Used to strip romex and contain labeling for exact wire gauge

32
Q

Electrical box characteristics

A

Round boxes are used for lighting fixtures and a square boxes are used for switches or outlets

33
Q

How does DC current flow

A

In one direction

34
Q

Types of AC current

A

Single-phase and three phase

35
Q

Single-phase is used in what apps

A

Residential apps

36
Q

Three phase occurs every

A

60th of a second (pushing of electricity)

37
Q

120 volts

A

15, 20 amps, wire size 14, 12

38
Q

15 A operates

A

Lights

39
Q

20 A operates

A

kitchen

40
Q

240 Volts

A

30, 40, 50 A and wire size 10, 8, 6

41
Q

30 A operates

A

Stove

42
Q

40 A operates

A

Water heater

43
Q

50 A operates

A

Dryer

44
Q

480 Volts

A

Wire size 4, 2, 0, 00, 000, 0000

Module 4, Lesson 3 (18 decks)

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