Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

NHIE > Electrical > Flashcards

Electrical Flashcards

1
Q

Electricity needs a force to move it through the conductors.
This force is called what?
And, is measured in what?

A

Voltage and Volts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Voltage is expressed as what an ohms law calculations?

A

E

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The amount of electricity moving through the conductors is called what?
And, is measured in what?

A

Current and amps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Current has expressed as what in ohms law?

A

I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The work performed by electricity in a load is called what?

and is measured in what?

A

Power and watts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Power is expressed as what in ohms law?

A

P

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Electricity encounters resistance when flowing in conductors and in loads. This is called what?

And, is measured in what?

A

This is called resistance or impedance. And is measured in ohms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Ohms is Expressed as what in ohms law?

A

R

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Grounding and bonding are often confused with each other. Both are safety related systems, but grounding is more about protecting what? And bonding is more about protecting what?

A

Equipment and people

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Two examples of Ohms Law

A

P=IxE

E=IxR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What system of the house acts like a voltage surge suppressor?

A

The grounding system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What safety system helps clear ground faults in normally non-current carrying materials?

A

Bonding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The grounding electrode system of a house electrical system consist of what two things?

A

Grounding electrode and grounding electrode conductor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

A UFER ground contains copper wire encased in concrete. How many feet? And size?

A

20 feet of #4 rebar or #4 AWG Bare copper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The grounding electrode conductor should be at least what size for an 150 amp or greater service?

A

6 AWG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

4 AWG Copper wire is required for UFER grounding electrodes with what size amp service or greater?

A

200 amp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What size copper wire may be used for 125 amp and smaller services for the GEC?

A

8 AWG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Single phase 120V electrical service to a house is usually considered a reportable deficiency. True or false

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the minimum electrical service current for a modern single family house?

A

100 amps

Key word current.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What are examples of required and dedicated branch circuits?

A

Kitchen countertop receptacles

Furnace or air handler

Receptacles in the laundry room

Receptacles in bathrooms

Kitchen exhaust fan or microwave oven

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Is the service load for the home (greater or less than) the sum of all circuits in the house?

A

Less then

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Service drop clearance above the roof.

Roof deck with pedestrian traffic?

A

10 feet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Service drop clearance above the roof, on a roof slope less than 4/12?

A

Greater than or equal to 8 feet or greater than or equal to 3 feet if roof guarded or isolated.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Service drop clearance above the roof where the roof slope is greater than 4/12?

A

Greater than or equal to 3 feet

25
Q

Service drop clearance above the roof, eave is less than or equal to 4 feet past house of wall?

A

Less than or equal to 6 feet of cable above eaves.

Greater than or equal to 18 inches from drip lines.

Maintain all clearances past roofline for greater than or equal to 3 feet

26
Q

Service drop clearance above the ground.

Garage, driveway, street

A

Greater than or equal to 10 feet above ground or walkway.

Greater than or equal to 12 feet above residential driveway.

Greater than or equal to 18 feet above public street alley or parking lot.

27
Q

Service drop clearance to building openings.

A

3 feet clearance required

Except for conductors and conduit and conductors and sheeting. Clearance is not required above openings

28
Q

The service equipment to the electrical panel, should have clear working space in the front?

A

At least 36 inches deep, 30 inches wide, and 78 inches tall, measured from the floor

29
Q

Areas were GFCI protection for receptacle is now required are usually where water may be present which includes?

A 
Kitchen countertops
 bathrooms
 garages 
laundry rooms 
unfinished basement
 unfinished detached buildings 
crawl spaces 
outdoors
30
Q

What are AFCI circuit breakers and receptacles intended to do?

A

Protect structures from fire caused during an arcing fault condition of the wiring within the wall, the installed switches and outlets, and the equipment plugged in.

31
Q

Maximum Ampacity of conductors in an NM cable.

A 
AWG - Amps
14 - 15
12 - 20
10 - 30
8 - 40
6 - 55
4 - 70

Aluminum is one size AWG larger, i.e., 14 AWG is 12 AWG

Note: larger wires hard smaller numbers

32
Q

Name the potential problem panel boards

A

Federal Pacific stab block panel boards

Zinsco/zinsco - Sylvania

Bulldog Pushmatic

33
Q

Common receptacles

A

120 V 15 amp,

240 V, 30 amp

120 V, 20 amp

34
Q

Kitchen countertop receptacles, GFCI protected receptacles, serving walls above kitchen countertops should be spaced so there’s no point along the wall above the countertop is more than what?

A

2 feet from receptacle, this means receptacles are often spaced about every 4 feet

35
Q

Receptacle serving walls in the habitable rooms should be spaced so that no point along the wall is more than what from a receptacle?

A

6 feet, this means it receptacles are often spaced about every 12 feet

36
Q

When are receptacles required on the peninsula or Island?

A

If it measures more than 2 feet long and 1 foot wide.

37
Q

Receptacles may be mounted on a kitchen island or peninsula cabinet so long as?

A

Receptacle is not more than 12 inches below the countertop and does not extend more than 6 inches past cabinet

38
Q

Bathroom receptacles, at least one GFCI protected receptacle should be located within how many feet of the outside edge of each bathroom sink?

A

3 feet,

39
Q

Outdoor receptacles, at least one GFCI protected receptacle should be installed within…

A

78 inches vertically from the walking surface at both the front and rear of the house.

40
Q

Hallway receptacles, at least one receptacle should be installed…

A

In a hallway that is 10 feet or more

41
Q

HVAC service is receptacles, at least one receptacle should be installed…

A

Within 25 feet from the same level as the HVAC equipment

42
Q

What is the maximum height of a switch?

A

79

43
Q

Required lights, a wall switch controls light should be located…

A

In every habitable room and bathroom.

44
Q

The light fixture should be a permanent ceiling or wall fixture in what rooms

A 
Kitchens
bathrooms 
Hallway 
stairway 
attached garage 
and exterior doors

the light fixture may be controlled by switch in other rooms

45
Q

Most exterior stairway should have a light where?

A

Near the top of the landing, unless the stairways to a basement which will be at the bottom landing

Keyword exterior

46
Q

Basement, attics and crawlspace should have at least…

A

One light if the space if used for storage or if it contains equipment that requires service

47
Q

Lights near tubs and showers, hanging light fixtures track lights and ceiling fans should have no parts located within…

A

A zone from 3 feet horizontally and 8 feet vertically from the tub room door threshold

Keyword hanging, Lights within the parameters should be listed for damp areas

48
Q

Lights in clothes closet, Can light fixtures with exposed incandescent bulbs be located anywhere in the closet?

A

No

49
Q

The clothes were closet is divided into two storage areas. What are they?

A

The hanging rod storage area extends vertically from the floor to the highest rod or 6 feet, which ever is higher, and 2 feet from the walls

The shelf storage area extends vertically from the highest shelf to the ceiling and horizontally from the widest shelf or 12 inches from the wall which ever is greater

50
Q

Lights in clothes closet, Surface mounted incandescent an LED fixtures should not be located within…

A

12 inches from closet storage areas.

51
Q

Lights in clothes closet, Surface mounted fluorescent fixtures and recessed incandescent, LED, and fluorescent fixtures should not be located within…

A

6 inches from closet storage areas

52
Q

According to the standards of practice what is required by the home inspector to report regarding smoke alarms and Carbon monoxide alarms?

A

The presence or absence of smoke alarms and Carbon monoxide alarms. You do not have to test them

53
Q

Many smoke alarm manufactures recommend the replacing of smoke alarms after…

A

About 10 years

54
Q

Carbon monoxide alarms have a shorter service life than smoke alarms, which is?

A

5 to 7 years

55
Q

Smoke alarm locations, the minimum requirement of a smoke alarm is?

A

An alarm in each bedroom and in the hallway near the bedroom

At least one smoke alarm on each story, including basement and have habitable Attics

Not including crawlspaces

56
Q

What is the ideal smoke alarm location on the ceiling?

A

At least 4 inches away from the wall

57
Q

Installation of smoke alarms on the wall is acceptable? True or false

A

True, so long it is at least 4 inches

and less than 12 inches from the ceiling.

58
Q

Voltage will decrease in a circuit as the resistance increases, given a constant current load.

Why is this important?

A

This is important when dealing with long wire lengths and small conductor sizes.

The longer the wires and the smaller the wires the more resistance

59
Q

Voltage will decrease in a circuit as the resistance increases, given a constant current load.

Why is this important?

A

This is important when dealing with long wire lengths and small conductor sizes.

The longer the wires and the smaller the wires the more resistance

NHIE (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions