Question 1
An apprentice is replacing a fluorescent luminaire in a damp basement with a new LED fixture. The branch circuit has no GFCI protection. Which is the best action to improve safety?
Question 2
Which type of light source typically requires a ballast to operate?
Question 3
Which light source typically uses a ballast?
Question 4
Which component in an LED fixture is responsible for converting line-voltage AC into the low-voltage DC required by the LEDs?
Question 5
In an LED lighting system, what is the function of the 'driver'?
Question 6
Which of the following is an advantage of using LED lighting over traditional incandescent lighting in a commercial facility?
Question 7
In a typical 120 V residential lighting circuit using a standard lamp holder, what is the neutral conductor connected to?
Question 8
Which type of lamp requires a ballast to operate?
Question 9
The 'Kelvin' rating of a lamp refers to its:
Question 10
What does 'L70' indicate regarding LED fixture lifespan?
Question 11
What does the 'CRI' (Color Rendering Index) of a lamp measure?
Question 12
Which lighting technology requires a 'driver' to regulate low-voltage DC power to the diode?
Question 13
Which type of lamp is known for excellent color rendering and instant-on capability but low efficiency?
Question 14
What is the main advantage of using LED lighting over incandescent lighting?