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
