First Year, First Semester Final Part 1
Typical 12-volt automobile batteries contain _____ cells
6 cells
Luminaires are often supplied with seperate trims, lenses, diffusers, etc.... The NEC at 110.3(B) states that "listed or labeled equipment shall be used or installed in accordance with any instructions included in the listing or labeling" This means that it is permitted to use the trim ring from a halo luminaire on lightolier downlight....
False!!!
Section _____ of the NEC states that receptacle that is placed in a bathroom cabinet in a dwelling does not have to be GFCI protected.
False, It shall be protected.
a definition of a luminaire can be found in either:
The NEC or a GE catalog.
A particular UPS system uses 12-volt batteries. a minimum of _____ batteries will be required to deliver standby power at 120 volts.
10 batteries
Along a wall line, (not separated by doors), the maximum spacing between receptacles in the dining room in a HOUSE is ______ feet
12 feet (think between receptacles)
What is the power used by a 12-volt circuit having two 6 watt loads connected in series?
12 watts
Receptacles for use on nominal 120 volt circuits are marked ______ Volts.
125 Volts
at 180 VA per outlet, how many outlets can be installed on a 20 amp circuit (120 volt) if the circuit loading is to remain within its ratings?
13
Although not limited by the NEC, if a 15 amp residential circuit is to be loaded only up to its rating, how many outlets can be put on the 120-volt circuit if the outlets are rated at 120 VA per outlet?
15
The _________ conductor must have an outer covering that is either white or gray in color
Grounded
The Neutral conductor is also called the:
Grounded Conductor
HID is an abbreviation for:
High intensity discharge.
The ungrounded conductor is often Called:
Hot Conductor.
Which of the following is an example of a device?
Single pole switch, single receptacle, duplex receptacle
Many electricians wire the lights and receptacles in a room on different circuits because this ______
offers the advantage that all power in a room will not go out if the overcurrent protective device trips.
The guards on power tools should never be removed
True
Study box fill extensively you *******.
yes sir
the diameter of a T8 lamp is:
1 Inch
the power used by a 120-volt, 10-ampere load is ______
1.2 kW
Unless identified for contact with insulation, all parts of recessed luminaires shall be at least _____ inches from combustible materials per the NEC
1/2 INCH
What is the current in a circuit if the voltage applied to a load is 492 volts? The connected load contains two series-connected resistive heating elements that are EACH rated for 2.8 KW at 250 volts.
11.2 amps.
Spaces about battery systems shall comply with NEC _____. Working spaces shall be measured from the edge of the battery cabinet, racks, or trays.
110.27
When a ballast's case temperature reads 110 degrees celsius, the thermal protection for a class P ballast must open within:
2 hours
Guest suites of hotels with permanent cooking provisions shall be required to have AFCI protection for the bedrooms according to _______ in the NEC
210.18
Section ____ of the NEC states that ceiling fans exceeding 35 pounds shall be supported by an outlet box that is listed for the purpose and marked with the maximum weight that it can support.
314.27(C)
How many #10 AWG conductors may be installed in a 4" x 2 1/8" x 2 1/8" device box?
5
The transistor type batteries used in smoke detectors have a voltage rating of _____
9 Volts.
according to the NEC, combustible material adjacent to luminaires cannot be subject to a temperature rating exceeding:
90 degrees celsius
which of the problems listed below could cause a fluorescent lamp to have trouble starting?
A broken Lampholder, an air temperature of around 50 degrees Fahrenheit or less, a lamp that is installed with one of the bi-pins outside the lampholder, and a lampholder that is not properly grounded.
A ________ is a unit of an electrical system that is intended to carry or control electric energy as its primary function
A receptacle, switch, or device
A bathroom is defined as an area including a basin, with one or more of the following:
A toilet, tub, and/or a shower.
Article _____ of the NEC defines a bathroom.
ARTICLE 100 has ALL DEFINITIONS
Where are electrical receptacle outlets not permitted to be located?
Above certain electric baseboard heaters
incandescent dimmers can be used to control fluorescent luminaires.
Absolutely not, absolutely false
The NEC allows _______ receptacle outlets to be connected on a 120-volt residential lighting or small appliance branch circuit.
An unspecified amount.
Convenience receptacles that are installed in bedrooms in a house are required to be protected by an:
Arc-Fault circuit interrupter
An arc fault circuit interrupter is a device intended to provide protection from the effects of arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is detected. this definition is found in _____ in the NEC
Article 100
Article ____ in the NEC covers storage batteries
Article 480
For branch circuits rated 120 volts, 20 amperes and supplying two or more receptacles, the receptacles are permitted to be rated:
BOTH 15 and 20 AMPERES
a class A GFCI receptacle or circuit breaker is designed to trip at levels of fault current ______
Between 4 and 6 mA
Incandescent lamps produce more lights per watt than HID lamps.
Completely and utterly False.
A 24-volt load would require that two 12-volt batteries be connected in ______ to deliver the correct voltage.
Connected in series.
If two identical 12-volt loads are to be operated from a single 24-volt battery, the loads would be connected in _____ to receive the correct voltage from the battery.
Connected in series.
Luminaires that are to be installed in damp locations, such as under a canopy covering a walkway into a building, are required to be marked "Suitable for ______ Locations"
DAMP LOCATIONS
C, D, AA, and AAA batteries are _____ type batteries.
Dry batteries.
Voltage in a series circuit of three resistive elements uses which formula?
E(t) = E(1)+E(2)+E(3)
For determining the spacing between wall receptacles in a dwelling, the sliding panels in glass doors are counted in the maximum spacing.
False
the two hots of a multiwire branch circuit (two hots and one shared neutral) can be connected to two individual single-pole GFCI circuit breakers in a panel and still function (operate) correctly.
False
when installed in an unfinished basement in a house, a receptacle that supplies power to a permanently-installed _____ is excluded from the NEC requirement for GFCI protection.
Fire alarm
What lighting system generally performs badly in low temperatures?
Fluorescent
For a dwelling, a 125-volt, 20-Amp receptacle installed outside is required to be _____
GFCI protected and weatherproof.
When using individual 6 AWG conductors in a raceway, which of the following colors of insulation are not permitted for the grounded conductor?
Green with yellow Stripe
The Colors of insulation reserved specifically for grounded and grounding conductors are:
Green, Gray, White.
Current in a series circuit of three resistive elements uses which formula?
I(t) = I(1)=I(2)=I(3)
You have a load that operates at 6 volts but requires more current to operate than a single battery could deliver. to supply enough current to operate the load you should connect multiple 6-volt batteries in _____
In parallel
A standard incandescent dimmer can be used to control which of the following loads?
Incandescent lighting ONLY
As the resistance in a series circuit is decreased, the amount of current in the circuit _______
Increases
as more loads are added to a series circuit, the resistance of the circuit _________
Increases
In accordance with 404.2(C)(2) a three wire cable is installed between a 2-gang switch box and a ceiling outlet box. a fan with a light kit will be installed in the ceiling box. two 1-pole switches will be installed in the box with one for the fan and one for the light. The white conductor used to feed the hot to the switches has to be re-identified with black tape (or equivalent) ________
Inside the switch box and inside the ceiling box
When luminaires are the cause of fires, one of the two biggest contributing factors is installing _____ that have wattage ratings that exceed those of the luminaire.
Lamps
The required minimum clearances for surface-mounted fluorescent luminaires installed in clothes closets are ______ those for incandescent luminaires.
Less than
The quantity of light emitted by a source (lamp) is measured in:
Lumens
What lamps are considered high intensity discharge?
Metal halide, & high-pressure sodium.
A free standing cabinet is to be installed in a science classroom at a high school. the plans show a listed receptacle installed face up in the cabinet countertop. does section 406.5 in the NEC prohibit this installation?
NO
Can a standard incandescent dimmer be used as a speed controller for a ceiling fan?
NO
When raised covers (industrial covers) are used for receptacles, does the code permit fastening the receptacle to the cover with just the one center 6/32 screw?
NOOOOOOOOO
The minimum spacing between wall receptacles in a RESTAURANT DINING ROOM is _______ feet
NOT SPECIFIED (COMMERCIAL BUILDING)
A foot-candle is equivalent to _______ per square foot
One lumen
the governors mansion in california has a hallway that is 120 feet in length. The minimum number of receptacles required by the NEC in this hallway is ______
One receptacle
Branch circuits are rated according to their _____
Overcurrent protective device rating.
Power in a series circuit of three resistive elements uses which formula?
P(t) = P(1)+P(2)+P(3)
Resistance in a series circuit of three resistive elements uses which formula?
R(t) = R(1)+R(2)+R(3)
RFI is an abbreviation for:
Radio Frequency interference
objects viewed under the light produced by a sodium lamp have colors that are distorted or not the same color as might be seen in direct sunlight.
TRUUUUUUe
The 20-ampere branch circuit required for bathroom receptacles is permitted to serve equipment other than receptacles only when ______
The circuit supplies other equipment only in that bathroom.
When batteries are connected in parallel, the ____ supplied to the connected load increases.
The current.
During normal operation, the current flows out to a 120 volt load, the current flows out on the "hot and returens on the _______ conductor. Assume this is a properly connected circuit
The grounded conductor
If a ground fault occurs in the conductors leading out to a 120 volt load, the current flows out on the hot and almost all of the current returns on the _____ conductor. assume this is a properly connected circuit.
The grounding conductor.
You are touching a metal cased tool or other equipment and you are standing on a grounded surface so that you are grounded. When the tool or equipment is faulty and a ground fault occurs, this leakage ground fault current will travel through you, then through the grounded surface, and then to:
The power source
Where do lighting circuits via NEC 404.2(C) require a grounded conductor?
The switch box or enclosure
The inventor of the worlds first practical electrical light bulb was:
Thomas Edison
A GFCI circuit breaker may suffer from nuisance tripping if the branch circuit is extremely long.
True
A luminaire is rated for a maximum of a 60 watt lamp. If a 100 watt lamp is installed the luminaire ma overheat and cause a fire.
True
Devices rated for higher voltages may also be used for lower voltage branch circuits
True
an integral thermal protector for recessed luminaires will automatically restor power once the luminaire has cooled.
True
When receptacles are installed in a dwelling for the connection of kitchen countertop appliances, the NEC specifies that tamper-resistant receptacles be installed.
Trueeee
Some portable appliances use double insulation in place of grounding to provide shock protection to users. double insulated appliances normally have ____ power cords and attachment plug caps.
Two wire
Which of the wiring methods listed below is permitted to be used for "fixture whips"?
Type AC cable, Type MC cable, or flexible metal conduit are all permitted to be used.
recessed luminaires constructed for installation in thermal insulation are rated as _______
Type IC
What is the significance of the 6-foot limitation of fixture whips?
When a wiring method is used (that is permitted to be longer than 6 feet for other than luminaire connections) "fixture whips" longer than 6 feet are required to be supported and grounded per the NEC for that wiring method.
Does the NEC have GFCI requirements for 120-volt receptacles along a wet-bar sink countertop in a dwelling?
Yes
For stairway lighting in a DWELLING, a typical installation is to install a 3 way switching system. Does this satisfy the NEC requirement?
Yes
Aerial lifts may be modified if:
You have written permission from the manufacturer.
C, D, AA, and AAA batteries can be ______ type batteries
Zinc-Carbon, or alkaline type batteries.
A series circuit consists of a power source, circuit conductors, and a lamp. If the filament in the lamp is broken, this circuit is called a ______ circuit
an open circuit
The NEC specifies that the maximum number of receptacles that can be connected to a 15-amp, 120 volt branch circuit in a DWELLING is_______
an unspecified amount.
A luminaire is rated for a maximum of a 60 watt lamp. if a 100 watt lamp is installed, the lamp will not be as bright because of the lower rating of the luminaire.
false.
repeatedly turning lamps on and off will cause the lamp to have _____ life than if it were left on for the same number of hours.
that bitch is gonna burn out quicker.
a luminaire consists of:
the lampholder AND the lamp!
