Final Exam
An appliance disconnecting means may be a branch circuit switch switch or breaker if the appliance is permanently connected and not over 300 watts or ____.
1/8 hp
RMC is the wiring method used for the illustration below. The conduits are threaded wrenchtight into the entries in the bottom of the bell box. No additional support is required for this installation if the conduit length from the finsh surface to the box is ____ inches or less.
18
In a house, when laying out the wall receptacle locations in a bedroom, make sure that a receptacle is installed in any wall space ____ wide or greater.
2 feet
Is it permitted to connect the metal frame of the attic exhaust fan to the grounded conductor?
no
When ____, it is permitted to install receptacles face up in the bathroom countertops.
none of the above
What is the maximum distance of the receptacle from the intended location of the washing machine.?
6 feet
Television antenna and lead-in wires are covered under Article ____.
810
What is the minimum burial depth of a 20-amp, GFCI protected, 120 volt branch circuit under a two family dwelling? the wiring method is Type UF cable. The duplex is NOT built on a concrete slab.
12''
A bathroom vanity lighting fixture will draw ____ amps when connected to a 120-volt branch circuit. the fixture has twenty-four lamps installed. Each lamp has a rating of 40 watts at 120 volts.
8
What size THWN/THHN copper wire is required for a clothes dryer that draws 32.5 amperers? what size THWN/THHN copper wire is required to supply a clothes dryer that hs the following on the manufacturer nameplate? 32.5 amperes 240-volts 45 A- circuit breaker
8 awg
Both metal piping systems and grounded metal parts in contact with the circulating water shall be bonded togethe using a copper bonding jumper, insulated, covered, or bare, not smaller than_____.
8 awg solid copper
What standard size fuses would be required for a 24-volt, 15,000- watt furnace? (assume single phase).
80
Article 725 in the NEC classifies transformers and low-voltage wiring for doorbells and chimes as ____ circuits.
Class 2
The NEC ____ permit the cord and plug connection from a range to a receptacle to be used as the disconnecting means. Does/does not
Does
A central air conditioning unit is to be installed and you are required to run power to it. The breaker panel is within sight of the equipment. The nameplate information is: single phase 240-volt MCA 32.7 MOCP 50-A fuse You are permitted to install which of the following? I. a 60-A breaker in the panel II. a 50-A breaker in the panel III. a 60-A breaker in the panel with 50-A fuses in the AC disconnect switch
III only
The fewest number of 120 volt, 20 amp branch circuits you are permitted to install in a house to serve bathrooms is _____. The house has 3 bathrooms and the circuits will supply only bathroom receptacles
1
A clothes dryer will draw _____ amps when operated at 208 volts. The dryer nameplate states that it is rated for 9.7 KW at 240 volts.
35.03
If more than 4 feet of track is needed, at least one additional support mus be installed for every extention of ____ feet or less.
4
Lighting tracks that are ____ feet or less in length must be fastened at a minimum of two places.
4
Section ____ of the NEC states that luminaries, switches, receptacles and other electrical equipment not associated with the hydro massage tub shall be installed according to____
680.72, chapters 1 through 4
The white conductor contained in a 12/2 with ground mc cable can be marked with orange taper where visible or accessible and used to feed the hot to a switch. T/F
False
In general, all 125 volt, 15 amp receptacles installed in residential garages shall have GFCI protection. T/F
True
Which of the following are permitted to serve as the disconnecting means for a food-waste disposer? I. the branch-circuit breaker II. a wall switch that disconnects the ungrounded conductor III. a receptacle and cord arrangment
any of these
The NEC _______ the branch circuit conductors for a range to be sized at less than the nameplate rating of the range. Does or Does not Permit
does permit
The NEC permits a ____ to be used as the disconnectin means for a 2.9 KVA, 240-volt, single phase air compressor.. I. 2 pole circuit breaker II. 2 pole switch (DPST)
either I or II
The experienced driver knows that skids are likely on _____, so the slow down ahead of time. I.curves II. turns
either I or II
The greatest number of 120-volt, 20-amp circuits you are permitted to install in a house to serve bathrooms is ____. The house has 3 bathooms and the circuits will supply only bathroom receptacles.
unlimited
When required to be grounded, the shield of a coax cable shall be grounded with at least a size ____ AWG conductor according to the NEC article 820
14
The minimum depth of rigid metal conduit under an airport runway is ____.
18"
When a circuit for a central electric furnace heating system is installed, the NEC has requirements in Section _____ that specify what other loads are permitted to be connected to the circuit.
422.12
Which NEC Article covers the installation of wiring and equipment for fire alarm systems?
760
The NEC defines a signaling circuit in_____.
Article 100
Residential telephone conductor installations must be made in accordance with the requirements of _____.
Article 800
Which of these is the National Fire Alarm and Signaling Code?
NFPA 72
A ____ is a box that contains a receptacle connected to the branch circuit conductors.
Receptacle outlet
According to the NEC Article 725, the outputs of two different Class 2 transformers can be connected together ____.
if they are listed for interconnection
A GFCI receptacle ___ permitted to be located directly behind a freezer in a residential garage I/IN
is not
A receptacle under the kitchen counter of a dwelling is used to supply power to a disposal. Is the receptacle required to be GFCi protected? Y/N
yes
Type UF cable installed under a parking lot must be buried atleast _____ inches deep.
24"
What size THWN copper conductors are required to supple a 15,000 watt, 240-volt furnace? (assume single phace and 75C terminators).
4 awg
When class 2 control circuit wiring enters the wiring enclosure of a piece of equipment, this wiring is permitted to pass through the line voltage of the enclosure if no splices are made in the Class 2 wiring. T/F
False
Given the options shown below, which a re required to be marked on a n appliance nameplate? I. resistance II. voltage III. power
II and III only
When laying out the wall receptacle locations in a bedroom in a house, make sure that a receptacle is no more than ____ from the next receptacle along the floor line.
12 feet
An air conditioner will be installed on the roof of a sporting goods store. The NEC requires that a 15- or 20- ampere, 125 volt receptacle be installed for servicing the equipment. The receptacle will be outside and exposed to weather. The receptacle is required to____. I. have a weather proof cover installed II. be GFCI protected III. be located 25 feet or less from the equipment.
I,II,III
When a type UF cable is installed under a residential driveway, it is required to be ____. I. installed in PVC or RMC or IMC II. installed at least 18 in. below the top of the driveway.
II only
When the road surface is slippery, braking distance is dependent upon the ____ the vehicle's tires.
Kind of contact made by
When an outdoor receptacle is used for the permanent connection of a cord from a 12-volt low-voltage lighting transformer, a cover must be provided that maintains the weatherproof integrity of the receptacle. T/F
True
Lighting track shall be grounded in accordance with Article 250 and the track sections shall be securely coupled to maintain continuity of the ____ throughout. I. circuitry II. polarazation III. grounding
all of these
Acording to article 422, an accessible separable connector or an accessible ___ shall be permitted to serve as the disconnecting means for cord and plug connected appliances.
plug and receptacle
The Code section that specifies that the rating of any one cord and plug connected utilization equipment shall not exceed 12 amps for a 15-amp branch circuit is____.
210.23 (A)(1)
Code section ____ specifies that the total rating of "hard-wired" utilization equipment shall not exceed 7.5 amps for a 15-amp branch circuit where lighting units, cord and plug connected utilization equipment not fastened in place or, both, are also supplied.
210.23 (A)(2)
The NEC reference that permits or prohibits connecting the metal frame of the attic exhaust fan to the grounded conduction is_____,
250.142 (B)
Section ____ in the NEC provides provisions for damage protection of 120-volt, direct buried conductors and cables.
300.5 (D)
What article in the NEC covers use of type SE cable for dryer connections?
338
Article ____ covers wiring with UF cable.
340
An air conditioner will be installed on the roof of a "strip" shopping center. The NEC requires that a 15- or 20- ampere, 125-volt receptacle be installed for servicing the equipment. The receptacle will be outside and exposed to weather. The receptacle is _____. I. required to have a weatherproof cover installed II. permitted to be connected to circuit on the load side of the air conditione disconnection means.
I only
Each 10' section of lighting track is rated for 15 amps at 125 volts. The circuit supplying this track can be connected to a ___- amp, single pole breaker in a 120/240 volt singe phase, 3 wire panel. I. 15 II. 20
I only
A receptacle installed inside a cabinet to serve a cord connected microwave oven mountted in the cabinet____ permitted to be connected to one of the two required small appliance branch circuits for the home. I/IN
is not
Class 2 control circuit wiring that supplies a piece of equipment____ permitted to be supported by attachment to the power raceway or cable that supplies the equipment. I/IN
is not
Lighting track _____ permitted to be installed within a zone extending 3 feet horizontally and 8 feet vertically from the top of the bathtub rim. I/IN
is not
When an appliance is not marked with its maximum overcurrent protection, the branch circuit protection device is ____/
sized according to the ampacity of the branch circuit conductors supplying the appliance
A window air conditioner is cord connected and the receptacle will be connected to a branch circuit that supplies other receptacles. The air conditioner will draw 9.7 amps. The smallest circuit breaker that can be installed for the branch circuit is ____ amps.
20
The name plate on a single phase boiler indicates that it can be operated a either 240 or 480. It contains two heating elements. Each element has a rating of 12.3 at 240 volts. When properly connected to a 480 volt circuit, the boiler will supply _____ watts of power.
24,600
A window (room) air conditioner is cord connected and a dedicated branch circuit will be run for the receptacle. The air conditioner will draw 19 amps. The smallest circuit breaker that can be installed for the circuit is ____ amps.
25
When a rooftop air conditioner is installed on a strip shopping center, a 15- or 20-ampere, 125-volt receptacle is required to be installed for servicing the equipment. Additionally, if installed outside, the receptacle is required to ____. I. be located 25 feet or less from the equipment II. be AFCi protected
I only
When using AC cable, the conductor with white insulation may be used as an ungrounded circuit conductor ______. I. when used to connect 12- volt luminaires II. if marked with black taper where visible or accessible and used to connect a 480- volt duct heater III. if marked with pink tape where visible or accessible and used for a traveler from a 4way switch/
I,II or III
The term gigahertz means _____ per second.
billion cycles
NEC sections 422.30 through 422.35 allow which of the following disconnecting means for fixed appliances not over 300 VA or 1/8 horsepower? I. branch circuit breaker II. attachment plug cap III. separate disconnect switch
all of these
When air conditioning equipment is installed in an attic, a ____ is required. I. disconnecting means for the AC equipment II. lighting outlet near the AC equipment III. light switch near the attic entrance. VI. convenience receptacle within 25 feet of the AC equipment
all of these
An air conditioner will be installed on the roof of a strip shopping center. The NEC requires that a 15- ampere or 20- ampere, 125-volt receptacle be installed for servicing the equipment. The receptacle will be outside and exposed to weather. The receptacle is required to ____. I. have a weatherproof cover installed. II. be GFCI protected
both I and II
An air conditioner will be installed on the roof of a strip shopping center. The NEC requires that a 15- or 20- ampere, 125 volt receptacle be installed for servicing equipment. the receptacle will be outside and exposed to weather. The receptacle is ____. I. required to have a weatherproof box II. permitted to be connected to the circuit on the line side of the equipment disconnecting means
both I and II
Track lighting _____ be installed in wet or damp locations, where subject to physical damage, or in concealed locations. can/cannot
cannot
A 3/4" RMC comes out of the ground and is tightly threaded in to the hub of a 3/4" conduit body that is 16 inches above the ground. Section 314.23 in the NEC _____ the conduit body to be adequately supported by the rigid metal conduit.
considers
What NEC article covers Community Antenna and Television and Radio Distribution?
820
How much current does a 6,000 volt ampere, 240 volt clothes dryer draw?
25 amps
Grounding and bonding requirements for residential TV services must conform to the requirements of Articles(s)____. I.250 II.810 III.820
I,II and III
When measuring the depth of a buried raceway, you must measure from the top of finish grade to the ____ of the buried raceway.
Top
Most skids could be avoided by _____, and it is possible to recover from skids if you know how.
adjusting to the conditions
A conduction with a white insulation may be used as an ungrounded circuit conductor____. The conductor is contained in a cable. I. if used for a 12-volt door chime system wiring. II. if marked with black tape where visible or accessible and used to connect a 240-V pump III. if marked with red tape where visible or accessible and used for a traveler from a 3-way IV. if marked with blue tape where visible or accessible and used to feed the hot to a switch
all of these
When located _____, a receptacle is required to be GFCI protected. I. outside on the exterior wall of a house. II. on the roof of a resturant III. in a bathroom adjacent to a basin in a resturaunt
all of these
All electrical outlets in residential bedrooms shall be protected by
arc fault interrupters
The NEC reference that permits or requires that hydromassage tubs and all of their electrical components be GFCI protected is _____.
none of these
A receptacle under the kitchen counter of a dwelling is used to supply power to a garbage disposal. This receptacle is _____ to be connected to one of the two required small appliance branch circuits.
not permitted
Hydromassage tubs and all of their electrical components ____ GFCI protected
shall be
GFCI protection is required for a single receptacle installed to power a residential garage door opener. T/F
true
The white conductor contained in a 12/2 with ground SO (flexible) cord can be used to connect to 240 volt lighting fixtures T/F
true
Does the NEc permit a 2pole switch to be used as the disconnecting means for a 3.3 KVA, 240 volt, single phase air compressor? the switch is rated for the load. Y/N
yes
In the living room, do fixed glass panels count as wall space?
yes
In residential bathrooms, all electrical outlets shall be protected by _____. I. ground fault circuit interrupters II. arc-fault circuit interrupters
II only
As measured along the floor line, make sure that a receptacle is not more than ____ feet from the next receptacle when laying out the wall receptacle locations in a bedroom in a house.
12
Fire alarm circuits and equipment shall be grounded in accordance with NEC article______.
250
When a circuit for a cord connected window air conditioner is installed, the requirements for connection to aa equipment grounding conductor are located in section ____ in the NEC.
250.114
NEC 430.102 requires that a ____ have a disconnecting means and that it be in sight. I. motor II. motors controller
Both I and II
Each 10' section of lighting track is rated for 20 amps at 125 volts. The circuit supplying this track can be connected to a _____- amp, single pole breaker in a 120/240 volt, single phase, 3 wire panel. I. 15 II.20
Either I or II
According to EWR drawing 2, what do the straight dashed lines represent?
Exposed false beams
When laying out the wall receptacle locations in a bedroom in a house, a receptacle is required to be installed in a wall space that is 1'-10' wide. T/F
False
Plan ahead of time for lane changes; ____; and signal your intentions to traffic behind and swing over in a long, gradual tangent. I check your rear view mirrors. II. reduce your speed. III. check your blind spots.
I and III only
When a sigle-car garage is attached to a house, the NEC requires that the garage have at least ______ receptacles installed inside the garage.
One on any wall
The white conductor contained in a 12/2 with ground MC cable can be marked with orange tape where visble or accessible and used to connect a 240-v pump motor. T/F
True
When a 120 volt receptacle and a TV outlet are mounted in a double gang box, _____ is required in the box to isolate the TV conductors from the power wiring.
a barrier
When a rooftop air conditioner is installed on a strip shopping center, a 15- or 20- ampere, 125 volt receptacle is required to be installed for servicing the equipment. Additionally, if installed outside, the receptacle is required to _____. I. have a weatherproof cover II. be GFCI protected
both I and II
When located ____, receptacle is required to be GFCi protected. I. in a bathroom at IEC II. outside on the exterior wall of an elementary school.
both I and II
You are sent on a service call to install power for a new central air-conditioning unit. The nameplate has the following information: ph 1 volts 240 MCA 25.5 MOCP 45 a fuse. The old (inefficient) unit has 6 awg copper branch circuit conductors, a 60-A braker in the panel, and 60-amp fuses in the AC disconnect switch next to the unit. You are permitted to____.
leave the ^0-A breaker in the panel but change the fuses in the disconnect to 45 amps
For the EWR, residence, the disconnecting means for the submersible water pump is within sight of the _____.
controller
When a cord connected window airconditioner is the only connected load, the current drawn by the unit shall not exceed _____% of the branch circuit rating.
80
A new central air-conditioning unit is to be installed. This new AC replaces an old one. The name plate information on the new equipment is: single phase /240-volts/ MCA 29.7/MOCP 40-A fuses. The existing circuit has 8 awg romex connected to a 50-A breaker in the panel and a fused safety switch near the unit. There are 50-amp fuses in the safety switch. I. replace the fuses with ones rated at 40-amps II. replace the breaker with a 2-pole 40 amp/
I only
Which of the following are types of flexible cords? I. SJO II.SOW III.SO
I,II,and III
The NEC requires that conductors and overcurrent devices for electric space heaters be sized to carry_____.
(rated current)x(1.25)
Which of the standard-size disconnect switches listed below would be required for a 240-volt, 15,000 watt furnace?
100 amperes
What size THWN/THHN copper wire is required to supply a clothes dryer that ahs the following on the manufacturer nameplate? 5600 Volt-amperes 240-volts 30-A circuit breaker
10 awg
The maximum permitted curent rating of a portable appliance on a 30 ampere branch circuit is _____ amps.
24
All fixed storage water heaters of 120 gallons or less are required to have a branch circuit rating of not less than ____ percent of the nameplate rating of the water heater.
125
The disconnection means and branch circuit conductors for an electric furnace shall be sized not less than _____ percent of the total nameplate load shown on the furnace.
125
Table 400.4 in the NEC can be used to find ____.
types of flexible cord
An electric circuit consists of the ____. I.power source. II. conductors. III. load IV. switches
all of these
When located ______, a receptacle is required to be GFCI protected. I. in a bathroom in a convenience store II. in the bathroom wall at a restaurant and more than 6ft. from a basin
both I and II
