Lighting Quiz Flashcards
(17 cards)
A _______ bulb uses a ballast to ignite mercury vapor gas that emits UV light when electricity passes through it.
fluorescent
A series circuit is most common in a standard lighting circuit. T/F
False
Disregarding exceptions , liquid tight flexible metal conduit (LFMC) shall be securely fastened in place within _____ of each box, cabinet, or other conduit termination.
12 in
The standard base for most common lights bulbs is a Mogul base. T/F
False
______ are the unit to measure the temperature of a light.
Kelvin
An ________ bulb uses a filament that heats up and produces light when electricity passes through it.
incandescent
HID stands for what?
high intensity discharge
LEDs use drivers, while fluorescent lighting uses a _____ to regulated the current to prevent lamp from burning up.
ballast
A ______ converts AC to DC while a ______ converts DC to AC.
rectifier, inverter
The purpose of the NEC is _________________________.
“the practical safeguarding of persons and property from hazards arising from the use of electricity.”
The exact quote is not necessary. Knowing the gist should be enough.
An LED works by passing electric current through a semiconductor material, causing protons and holes to recombine at the junction, releasing energy in the form of light photons. T/F
False
Electrons and holes combine, NOT protons.
The amount of light falling on the surface is known as ________ .
Illuminance
Which fluorescent tube was invented first?
T12
What article in the NEC covers Luminaires?
410
A ______ is a device that converts light into electricity. It operated on a dusk to dawn switch that is used in conjunction with contactors.
photocell
What are the two types of contactors?
mechanical, electrical
Determine the amperage of a 400W light at 208VAC?
1.92
