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CNST 213 Final (CH 20, 21, 24, 26, 30)
Terms in this set (45)
How many transformers are normally interconnected for delivering 3o voltage to commercial customers?
Which of the following lamps is not an example of a High-Intensity Discharge lamp?
Power companies primarily use _o transformers connected in different combinations to deliver the correct power to customers.
A constant-wattage autotransformer ballast for a Mercury-vapor lamp is a ballast that uses a transformer which provides isolation between the primary and secondary circuits.
____ is a fluorescent lamp-starting circuit that has separate windings to provide continuous heating voltage on the lamp cathodes.
A substation is an assemblage of equipment installed for:
> All of the Above <
Low-pressure sodium lamps are good for outdoor lighting installations.
Fluorescent bulbs produce different shades of the color the help produce a certain environment. Which of the following is not a defined fluorescent light shade environment.
All motors are designed to operate at a given voltage. Normally, the applied voltage should be within plus or minus ___ % of the motor's rated voltage.
According to the NEC subsection 408.3(E), the phase arrangement for a 3o base must be in the following order, from front to back, top to bottom, and left to right.
A, B, C
Cool white or light white fluorescent bulbs produce a ____ whiteness.
Pale blue green
The "PAR" bulb type is usually used for an outdoor spotlight. "PAR" is an acronym for:
Color coated orange, this lag of a three phase system is the high lag with 195 V between it and neutral. Too high for 115V or 120V standard load and too low for 230V or 240V standard load.
Using the power formula P = E x I, a 75W bulb pulls how many amps when supplied by a 120V current.
The effects on voltage variations on a lamp depend on the lamp used. High-Intensity Discharge lamps operate within a close voltage range. low-wattage bulbs up to 200W should have an applied voltage within plus or Minus ____ % of the lamp fixture's rating.
The three widely accepted methods of proper residential grounding are component grounding, and clip grounding.
Which of the following is not a type of Conduit?
Armored Metal Cable
The length of an armored cable that is concealed in a wall can be shortened by allowing the cable to run wild.
Which conduit uses the same techniques for installation as metallic sheathed cable?
Flexible Metal Comduit
The information on the outside jacket of a nonmetallic sheathed cable typically includes which of the following
Size of conductor
Number of conductors
Type of jacket
> All of the above!!!!!
What Article of the NEC defines: Bends - How Made
To avoid damaging the conductors when armored cable is cut, a ____ bushing made of fiber paper or plastic is installed.
The NEC recognizes three types of armored cable for residential work. Which of the following is NOT a recognized type of armored cable?
A round indention punched into the metal of a box and held in place by unpunched narrow strips of a metal is known as a ____.
An ___ is a compound bend in conduit used to bypass many types of obstructions.
Where are bonding wires typically found?
What should be referred to in determining the carrying capacity of any wire?
A type of cable that consists of two or more individually insulated wires protected by a flexible metal outer jacket.
A rugged protective tube through which insulated conductors are pulled.
What type of nonmetallic cable is typically used for dry interiors.
A component plan is a drawing that indicates the placement of all electrical devices and components and the wiring required to connect all the equipment into the circuit.
Solder commonly used in electrical work is an alloy 60% lead and 40% in.
Splices are used to join two or more electrical conductors together by twisting them or by using a special splicing device.
Cold solder joints are typically caused by insufficient heat and are used when components are sensitive to heat.
In the 1800's Western Union splices were used to repair telephone wires.
GFCI receptacles required for every 4' of continuous counter space (12" wide or greater)
The type of splice is used to splice a conductor to a through wire
Solder is available as rosin core wire and acid core wire.
Plastic tape that insulates against voltage up to ___ V per wrap is typically used for residential wiring
The process of joining metals by using filter metals and heat to make a strong electrical and mechanical connection
A ______ splice is made by twisting two ends of wire together
Which of the following conductor gauge based on its a page and wattage rating is not suitable for branch circuits?
Pictorial drawings show the physical details of electrical components as seen by the eye
A weak splice that lacks a connector to hold the conductors together
Portable Cord Splice
A type of solderless connection that slips over the wires to be connected so that a nut can be attached.
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