Worksheetsresidential electrical services
Total questions: 33
Worksheet time: 17mins
Which of the following circuits require a minimum of 20A of overcurrent protection?
Residential small appliance branch circuits
General purpose branch circuits
Residential large appliance branch circuits
fixed appliance branch circuits
Which type of cable with a corrugated sheath has a maximum bend radius of 7 times the cable diameter?
Type MC
Type SE
Type AC
Type NM
According to the NEC, which of the following is required for the small appliance loads in each kitchen area?
Two 120V, 20A small appliance branch circuits
One 4,050VA small appliance branch circuit
One 1,500VA, 20A small appliance branch circuit
Two 240V, 10A small appliance branch circuits
According to NEC Section 220.53, loads for which of the following appliances shall be permissible to apply a demand factor of 75%?
kitchen appliances
fixed appliances
heating appliances
small appliances
Which of the following is an NEC approved grounding electrode?
Metal underground water pipe in direct contact with the earth for 10 feet.
Metal underground gas pipe in direct contact with the earth for 10 feet
A ground ring with a 25 foot diameter
a 5/8 inch galvanized aluminum rod 5 feet in length
The minimum clearance of service drop conductors over a residential driveway is reduced to 12 feet when the voltage is limited to
120V to ground
270V to ground
300V to ground
360V to ground
The section of the NEC that lists the requirements for installing service disconnecting means is
NEC Section 110.26
NEC Section 220.54
NEC Section 230.6
NEC Section 230.70
Cables routed through bored holes in framing members must maintain a distance from the nearest edge of not less than
1/16 inch
1/4 inch
1-1/4 inches
1-1/2 inches
When used as an outside service-entrance conductor, which of the following must be secured every 30 inches?
Type NM cable
Type SE cable
Type MC cable
Type AC cable
To control a device from three locations, a four-way switch must be used with which of the following?
One photoelectric switch
two three-way switches
four three-way switches
one two-pole switch
To control stairway lighting, a wall switch is required at each level when how many risers separate levels?
Three or more
four or more
five or more
six or more
Which section of the NEC covers the installation of pools and spas?
NEC Section 250
NEC Section 340
NEC Section 680
NEC Section 725
A GFCI sensor will trip when the
current in the neutral load is less than the current in the hot load
current in the neutral load is greater than the current in the hot load
device gets wet
current is less than the value established for a Class A device
Listed FMC may be used as an equipment grounding conductor if the circuit conductors are protected by overcurrent devices rated at?
15A or less
20A or less
greater than 20A
greater than 30A
Which section of the NEC covers equipment grounding and equipment grounding conductors?
NEC Section 250
NEC Section 340
NEC Section 680
NEC Section 725
One of the advantages of electric heat is that
it is less expensive than other types of fuels
only one thermostat is needed for the whole system
system maintenance is only required once a year
initial installation costs are less than other types of systems
Any outlet that supplies power to a hot tub shall be
less than 5 feet from the inside wall of the hot tub
GFCI protected
within sight of the hot tub
240V
The conductors that extend from the panelboard to various outlets are called
branch circuits
feeders
grounding electrode conductors
service-entrance conductors
Exposed noncurrent-carrying metal parts of fixed equipment must be grounded if the equipment operates with any terminal over
60V to ground
120V to ground
150V to ground
240V to ground
Conductors used for electric heating units must be sized for what percentage of the heater's nameplate rating?
70%
95%
100%
125%
In a residential pool area, receptacles
are not allowed within the fenced area
must be approved for providing power to underwater lighting fixtures
must be at least 6 feet from the inside walls of the pool
are only allowed if required by the pool manufacturer
A grounding electrode conductor must be
made of one-quarter inch steel plate
made of copper, aluminum, or copper-clad aluminum
green or green with yellow stripes
protected by a Class A GFCI circuit breaker
An electric heat pump is a type of HVAC system that
circulates hot water to baseboards
must be supplied by 20A circuits
furnishes more energy than it consumes
can also operate using combustible fuels
Power to the entire residence is shut off at the main service disconnect located
in the basement or unfinished crawl space
at the panelboard
at the service drop
at the main branch circuit
A feeder is used to connect
the main service panel and a subpanel
the main panel and duplex receptacles
branch circuits to circuit breakers
the service drop to the main panelboard
When a noncombustible wall finish is used, an outlet box may be recessed
1/4"
1/2"
5/8"
3/4"
