NCCER ELECTRICAL LEVEL 2 MODULE 3 QUESTIONS AND ANSWERS
VERIFIED ANSWERS
Light energy that is NOT absorbed by an object can be _____. - Correct answer~ reflected
from and/or transmitted through the object
A light that is considered warm in tone is produced by lamps with color temperatures of
_____. - Correct answer~ 3,000°K
The resistance of a tungsten filament is ______. - Correct answer~ much higher after the
lamp is turned on
The filament of a tungsten-halogen lamp is encased in a capsule containing iodine or _____.
- Correct answer~ bromine gas
During operation, a high-output (HO) fluorescent lamp typically has a current draw of _____.
- Correct answer~ 800mA to 1,000mA
The type of high-intensity discharge (HID) lamp that uses the oldest HID technology is the
_____. - Correct answer~ mercury vapor lamp
The diameter of a 4', T-12 fluorescent lamp is __. - Correct answer~ 1 ½"
To improve both ballast efficiency and lamp efficacy, an electronic ballast typically operates
the connected fluorescent lamps at a frequency of _____. - Correct answer~ 20kHz to 50kHz
A driver supplies stable power to a(n) _____. - Correct answer~ LED
, Most code requirements governing the installation of luminaries, lampholders, and lamps
are covered in _____. - Correct answer~ NEC Article 410
Luminaire whips used to connect from a junction box mounted above the ceiling to a
luminaire installed in a suspended ceiling must have a minimum length of ____. - Correct
answer~ 18" (450 mm)
The maximum luminaire whip lengths when wiring suspended ceiling luminaires is ____. -
Correct answer~ 6' (1.8m)
Suspended luminaires used in commercial and industrial buildings are supported by the ___.
- Correct answer~ building's structural members
When installed on a wall, the track for track lighting must be a minimum of _____. - Correct
answer~ 5' (1.5m) above the finished floor
When cutting the branch circuit wires in an outlet box in preparation for connecting a light
fixture the amount of free conductor length that should be left after it emerges from the
cable raceway is - Correct answer~ 6" (150mm)
_____ is light that hits a surface or object, regardless of the source of this light. - Correct
answer~ Incident light
Color temperatures of ______ and lower are described as warm in tone and slightly
enhances reds and yellows. - Correct answer~ 3,000°K
A color temperature of _____ is considered moderate in tone, producing a balance between
warmth and coolness. - Correct answer~ 3,500°K
Color temperatures of _____ and higher are considered cool in tone, slightly biased toward
blues and greens. - Correct answer~ 4,100°K
VERIFIED ANSWERS
Light energy that is NOT absorbed by an object can be _____. - Correct answer~ reflected
from and/or transmitted through the object
A light that is considered warm in tone is produced by lamps with color temperatures of
_____. - Correct answer~ 3,000°K
The resistance of a tungsten filament is ______. - Correct answer~ much higher after the
lamp is turned on
The filament of a tungsten-halogen lamp is encased in a capsule containing iodine or _____.
- Correct answer~ bromine gas
During operation, a high-output (HO) fluorescent lamp typically has a current draw of _____.
- Correct answer~ 800mA to 1,000mA
The type of high-intensity discharge (HID) lamp that uses the oldest HID technology is the
_____. - Correct answer~ mercury vapor lamp
The diameter of a 4', T-12 fluorescent lamp is __. - Correct answer~ 1 ½"
To improve both ballast efficiency and lamp efficacy, an electronic ballast typically operates
the connected fluorescent lamps at a frequency of _____. - Correct answer~ 20kHz to 50kHz
A driver supplies stable power to a(n) _____. - Correct answer~ LED
, Most code requirements governing the installation of luminaries, lampholders, and lamps
are covered in _____. - Correct answer~ NEC Article 410
Luminaire whips used to connect from a junction box mounted above the ceiling to a
luminaire installed in a suspended ceiling must have a minimum length of ____. - Correct
answer~ 18" (450 mm)
The maximum luminaire whip lengths when wiring suspended ceiling luminaires is ____. -
Correct answer~ 6' (1.8m)
Suspended luminaires used in commercial and industrial buildings are supported by the ___.
- Correct answer~ building's structural members
When installed on a wall, the track for track lighting must be a minimum of _____. - Correct
answer~ 5' (1.5m) above the finished floor
When cutting the branch circuit wires in an outlet box in preparation for connecting a light
fixture the amount of free conductor length that should be left after it emerges from the
cable raceway is - Correct answer~ 6" (150mm)
_____ is light that hits a surface or object, regardless of the source of this light. - Correct
answer~ Incident light
Color temperatures of ______ and lower are described as warm in tone and slightly
enhances reds and yellows. - Correct answer~ 3,000°K
A color temperature of _____ is considered moderate in tone, producing a balance between
warmth and coolness. - Correct answer~ 3,500°K
Color temperatures of _____ and higher are considered cool in tone, slightly biased toward
blues and greens. - Correct answer~ 4,100°K
