Lighting Systems Quiz

Front

LED systems last up to ________ hours

Back

50 000

Front

Which of the following light sources has the highest efficiency rating?

Back

LED

Front

The load on branch circuits supplying luminaries employing the ballast will be computed on the basis of the

Back

total current draw of the fixture units

Front

One disadvantage of an LED is:

Back

Cost

Front

A ____ switch can provide zero light output to full light output?

Back

dimmer

Front

Where are the travelers connected in a three way switching circuit?

Back

between the three way switches

Front

What is the maximum overcurrent of branch circuits supplying HID luminaries having 120 volts supply?

Back

40 amps

Front

Which of the following conditions will require a luminaire be supported independently of the ceiling outlet box?

Back

If the fixture weighs more than 23 kg

Front

In other than a dwelling unit, what is the maximum rating of over current devices used to protect branch circuits supplying lighting fixtures having an input voltage greater than 120 volts but less than 347 volts.

Back

20 amperes

Front

What is the maximum length of a raceway containing the tap conductors from a recessed luminaire?

Back

2 m