WorksheetsQ214 Residential Electrical Service_26111
Total questions: 42
Worksheet time: 21mins
General lighting loads are calculated based on a factor of _____ per square foot of living space.
2A
3mA
3VA
5VA
The area of an unfinished basement must be considered when calculating the general lighting load of a residence.
true
false
Each kitchen in a residence requires at least _____ 120-volt, 20A small appliance branch circuits.
5
2
3
1
When calculating the electric service load, the demand factor used when calculating the general lighting load is _____ percent for the first 3,000VA.
100
50
90
75
The required amperage rating of residential service size is found by dividing the total volt-amp load by the highest voltage.
true
false
Electric dryer loads are always computed by assigning a 5,000VA load to the dryer.
true
false
The neutral conductor in single-phase residential electrical services is usually smaller than the hot conductors.
true
false
A residence with five 120V circuits and four 240-volt circuits would require a circuit breaker panel with at least _____ spaces.
9
14
20
13
Only 15A circuits can be used for the lighting load.
true
false
A current imbalance as low as _____ will trip a GFCI device.
0.5mA
100mA
4mA
4A
Which of the following residential locations would not require GFCI protection?
kitchen countertops
bathrooms
bedroom receptacle
outdoor receptacles
A GFCI receptacle can provide ground-fault protection to other non-GFCI receptacles in the same circuit.
true
false
An example of a grounded conductor is _____.
the neutral wire in a three-wire electrical service
metal water pipe
the black wire attached to a 120V outlet
ground rod
Which of the following cannot be used as a grounding electrode?
An iron or steel rod
A ground ring encircling a building
Buried metal gas piping
Metal water pipe buried underground
A metal underground water pipe can serve as the sole grounding electrode.
true
false
All metal objects are suitable for use as rod-type grounding electrodes.
true
false
The use of ______ is prohibited as a grounding electrode conductor when in direct contact with masonry.
aluminum
stranded copper
copper
all the above
Which of the following methods cannot be used to connect the grounding electrode conductor to electrodes?
lugs
exothermic welding
clamps
soldering
When installing a residential service drop where the voltage is limited to 300V to ground, the required height above a residential driveway is _____ feet.
10
18
15
12
Service drop conductors for which no more than 6′ of the conductors travel over no more than 4′ of a roof overhang, may be installed a minimum distance of _____ inches above a roof.
18
96
12
36
Conductors in conduit buried 20 inches below the floor are considered outside of the building.
true
false
Which of the following statements about panelboard location is incorrect?
Panelboards are normally located on an outside wall.
Conductors under 3 inches of concrete are considered outside a building.
A panelboard located away from the meter and disconnect is called a subassembly.
Service disconnecting means must be readily accessible.
Romex® is another name for _____.
Type NM cable
Service entrance cable
Underground feeder
Type AC cable
Type NM cable must be secured at intervals not exceeding _____ feet.
4.5
3
2.5
2
Type MC cable may be embedded in masonry in damp locations.
true
false
Which of the following statements about service entrance cable is incorrect?
The cable must be secured every 30 inches.
Type SE cable may have an insulated grounded conductor.
SER cable is for underground use.
Cable with a bare grounded conductor is used outdoors.
Which of the following statements about equipment grounding systems is incorrect?
Flexible metal conduit may be used as an equipment grounding conductor.
A metal motor housing in a damp basement does not need to be grounded.
Where splices are made in junction boxes, grounding conductors must be spliced to the metal junction box.
Metallic raceways must be grounded.
Conductors extending from a panelboard's overcurrent device to the outlet(s) are _____.
primary conductors
feeders
service conductors
branch circuits
On electrical drawings, a branch circuit run above a ceiling is indicated by _____.
A.
dotted lines
B.
the letter B in a circle
C.
solid lines
D.
dashed lines
On electrical drawings, the number of current-carrying conductors in a branch circuit is indicated by _____.
a number followed by a star
a number followed by a letter
a series of dots next to the circuit
slash marks across the circuit
Both heating elements in an electric water heater have to be considered when calculating the conductor size and overcurrent protection.
true
false
A round symbol in the center of the room with lines going to other round symbols and the designation S3 indicates _____.
.
the fixture uses three lamps
B.
the fixture can be energized from different locations
C.
fluorescent lighting is being used
D.
the fixture uses a three-way bulb
.
the fixture uses three lamps
B.
the fixture can be energized from different locations
C.
fluorescent lighting is being used
D.
the fixture uses a three-way bulb
.
the fixture uses three lamps
B.
the fixture can be energized from different locations
C.
fluorescent lighting is being used
D.
the fixture uses a three-way bulb
.
the fixture uses three lamps
B.
the fixture can be energized from different locations
C.
fluorescent lighting is being used
D.
the fixture uses a three-way bulb
The number of grounding conductors in an outlet box has no bearing on the number of current-carrying conductors in the box.
true
false
Which of the following statements about outlet boxes is incorrect?
A.
All outlet boxes have mounting brackets.
B.
A switch reduces the number of conductors allowed in a box.
C.
A box may be recessed 14′′ in a finished masonry wall.
D.
Boxes must be mounted flush with all finished walls.
A.
All outlet boxes have mounting brackets.
B.
A switch reduces the number of conductors allowed in a box.
C.
A box may be recessed 14′′ in a finished masonry wall.
D.
Boxes must be mounted flush with all finished walls.
A.
All outlet boxes have mounting brackets.
B.
A switch reduces the number of conductors allowed in a box.
C.
A box may be recessed 14′′ in a finished masonry wall.
D.
Boxes must be mounted flush with all finished walls.
A.
All outlet boxes have mounting brackets.
B.
A switch reduces the number of conductors allowed in a box.
C.
A box may be recessed 14′′ in a finished masonry wall.
D.
Boxes must be mounted flush with all finished walls.
The longer slot on a 125V, 15A duplex receptacle indicates the _____.
brass terminal
B.
ground slot
C.
ungrounded (hot) conductor
D.
neutral conductor
brass terminal
B.
ground slot
C.
ungrounded (hot) conductor
D.
neutral conductor
brass terminal
B.
ground slot
C.
ungrounded (hot) conductor
D.
neutral conductor
brass terminal
B.
ground slot
C.
ungrounded (hot) conductor
D.
neutral conductor
The two remaining terminals on a three-way switch (other than the common) are called _____ terminals.
neutral
traveler
hot
energizer
In a properly wired three-way switch circuit, both switches must be in the up position or the down position for the lamp to be energized.
true
false
Which of the following statements about lighting control systems is correct?
Lighting must be provided near HVAC equipment.
B.
The neutral conductor connects to the hinge point on a three-way switch.
C.
Low-voltage wiring is expensive to install.
D.
Quiet switches must be installed in all residences.
Lighting must be provided near HVAC equipment.
B.
The neutral conductor connects to the hinge point on a three-way switch.
C.
Low-voltage wiring is expensive to install.
D.
Quiet switches must be installed in all residences.
Lighting must be provided near HVAC equipment.
B.
The neutral conductor connects to the hinge point on a three-way switch.
C.
Low-voltage wiring is expensive to install.
D.
Quiet switches must be installed in all residences.
Lighting must be provided near HVAC equipment.
B.
The neutral conductor connects to the hinge point on a three-way switch.
C.
Low-voltage wiring is expensive to install.
D.
Quiet switches must be installed in all residences.
Use a _____ in combination with two three-way switches to control a lamp from three different locations.
single-pole switch
B.
four-way switch
C.
low-voltage relay
D.
three-way switch
four-way switch
single-pole switch
B.
four-way switch
C.
low-voltage relay
D.
three-way switch
single-pole switch
B.
four-way switch
C.
low-voltage relay
D.
three-way switch
Low-voltage lighting control systems are less expensive than conventional lighting systems because the wiring and other components are smaller and less expensive.
true
false
Which of the following statements about baseboard electric heating is incorrect?
Good comfort can be maintained.
B.
Heaters are relatively inexpensive to install.
C.
Receptacles can be installed above electric baseboard heaters.
D.
Heaters are controlled with individual room thermostats.
Good comfort can be maintained.
B.
Heaters are relatively inexpensive to install.
C.
Receptacles can be installed above electric baseboard heaters.
D.
Heaters are controlled with individual room thermostats.
Receptacles can be installed above electric baseboard heaters.
Good comfort can be maintained.
B.
Heaters are relatively inexpensive to install.
C.
Receptacles can be installed above electric baseboard heaters.
D.
Heaters are controlled with individual room thermostats.
Which of the following statements about electrical installations around pools and spas is incorrect?
GFCI receptacles are only required near hot tubs.
Pumps and associated equipment must be grounded.
Power lines are prohibited over the pool.
Underwater light installations are permitted.
