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Elc ch.14 Exam Questions With Correct
Answers A+
Flourescent lamps require a ballast, what do LED's require? - Answer✔a driver
the heat generated in the LED and driver are dissipated by using - Answer✔heat sinks
NEC article 410 contains - Answer✔the provisions for the wiring and installation of luminaires
lampholders and lamps
do electric discharge lamps require a ballast? yes or no - Answer✔yes
the most common types of electric discharge lamps are - Answer✔flourescent mercury metal
halide high pressure sodium and low pressure soidum
mercury, metal halide and high pressure sodium lamps are also classifed as____________and are
considered__________loads - Answer✔high intensity discharge lamps (HID) nonlinear
electronic equipment such as computers, printers, scanners, and copiers are - Answer✔nonlinear
loads
__________is the amount of light received in a unit of time on an area at a unit distance from a
point source of one candela - Answer✔lumen
lumens per watt as miles per gallon, lumens per watt is a measure of the________light in
producing light from electrical energy - Answer✔effectiveness
efficiency is when_________and_________have the same units of measure; an efficacy is when
the units are different. A motor has an efficiency of___________in___________out -
Answer✔input output watts watts
Kelvin degree, the lower the number the_______the appearing is the light - Answer✔warmer
The_________the number the cooler appearing is the light - Answer✔higher
warm is considered ___________k to _____________k Greater than ____________k is
considered to be cool - Answer✔2000 3000 4000
color rendering probability is the ability of the lamp to portray objects_____________ -
Answer✔as normally as possible
1
Elc ch.14 Exam Questions With Correct
Answers A+
Flourescent lamps require a ballast, what do LED's require? - Answer✔a driver
the heat generated in the LED and driver are dissipated by using - Answer✔heat sinks
NEC article 410 contains - Answer✔the provisions for the wiring and installation of luminaires
lampholders and lamps
do electric discharge lamps require a ballast? yes or no - Answer✔yes
the most common types of electric discharge lamps are - Answer✔flourescent mercury metal
halide high pressure sodium and low pressure soidum
mercury, metal halide and high pressure sodium lamps are also classifed as____________and are
considered__________loads - Answer✔high intensity discharge lamps (HID) nonlinear
electronic equipment such as computers, printers, scanners, and copiers are - Answer✔nonlinear
loads
__________is the amount of light received in a unit of time on an area at a unit distance from a
point source of one candela - Answer✔lumen
lumens per watt as miles per gallon, lumens per watt is a measure of the________light in
producing light from electrical energy - Answer✔effectiveness
efficiency is when_________and_________have the same units of measure; an efficacy is when
the units are different. A motor has an efficiency of___________in___________out -
Answer✔input output watts watts
Kelvin degree, the lower the number the_______the appearing is the light - Answer✔warmer
The_________the number the cooler appearing is the light - Answer✔higher
warm is considered ___________k to _____________k Greater than ____________k is
considered to be cool - Answer✔2000 3000 4000
color rendering probability is the ability of the lamp to portray objects_____________ -
Answer✔as normally as possible
1
