8

Question 1

_____ is a method of describing the color of a lamp’s light output. It references the CIE standard chromaticity diagram and is expressed as “x” and “y” coordinates on the diagram

Answer 1

Chromaticity

Question 2

An electronic ballast that provides precise heating of the lamp filaments and tightly controls the pre-heat duration before applying starting voltage to ignite the lamp is called a(n) ___ .

Answer 2

programmed start ballast

Question 3

A fluorescent lamp that has single pin contacts and requires no filament heating to ignite is called a(n) ____ lamp.

Answer 3

SLIMLINE

Question 4

_____ is the spiraling or swirling of fluorescent lamps at initial turn on or energy-saving lamps at low temperature or low-current.

Answer 4

Striation

Question 5

A ______ is an electromagnetic ballast that starts and operates preheat lamps similar to a rapid start lamp.

Answer 5

Trigger start ballast

Question 6

refers to the light output from a fluorescent lamp that diminishes as the lamp is used

Answer 6

lamp lumen depreciation

Question 7

Raising ____ at which power is applied to fluorescent lamp allows both the lamp and ballast to operate more efficiently

Answer 7

frequency

Question 8

is the measurement of how effectively a ballast converts the voltage and current supplied by power source into watt of visible power delivered to the ballast and lamp.

Answer 8

power factor

Question 9

on power lines can cause overheating of neutral wires panelboard transformers and capacitors

Answer 9

Excessive harmonic distortion

Question 10

the lamp and ballast system ability to minimize light output depreciation over life of the lamp.

Answer 10

Lumen maintenance

Question 11

When switches or dimmers are positioned before the power supply of the lighting fixture and power supplying the power supply will continue to consume energy even when shut off

Answer 11

off state power consumption.

Question 12

which type of Hid operated more like fluorescent

Answer 12

Low pressure sodium

Question 13

when making a comparison of light output between an LED fixture and a conventional lighting fixture what photometric data should be used

Answer 13

fixture lumens

Question 14

Mercury vapor and traditional metal halide include an internal within and arc tube.

Answer 14

probe

Question 15

To calculate power factor ballast use _____

Answer 15

Input watts/Input VA

Question 16

2 key measures of quality of white light are

Answer 16

color rendering mix

corrected color temp

Question 17

LED cove lighting are well suited for

Answer 17

uplighting

effect lighting

Question 18

LED fixture consist of

Answer 18

LED lamps Fixture housing
electronics
primary lensing

Question 19

Diode is considered forward biased when

Answer 19

a neg. charge is applied to the n-type side of a diode

Question 20

used in theaters, concerts , stage production, restaurants, casino and various other public spaces calling for dramatic lighting

Answer 20

Full color led lighting

Question 21

The junction temp on a LED is affected by

Answer 21

ambient temp
Thermal path
drive currents.

NOT AFFECTED by dimmers or control wattage

Question 22

T12 bulb will measure

Answer 22

12x(1/8) = 1.5 inches

Question 23

6 protection scheme e-vision ballast are

Answer 23

internal fusing 
auto thermal protection reset 
power control monitoring 
auto lamp power control 
auto lamp monitoring 
output short circuit

Question 24

3 factors light fixture deliver to lighting task

Answer 24

angle of fixtures (height)
Distance from area to be lit
amount of lamp life remaining

Question 25

3 factors that affect junction temp of LEDs

Answer 25

Drive current
Thermal path
ambient temp

Question 26

4 advantages of led over conventional fixtures

Answer 26

longer life
energy efficiency
better lumen maintenance
wide spectrum of colors

Question 27

4 possibilities of using microprocessor electronic ballasts

Answer 27

daylight harvesting
load shedding
dimming
energy savings.

Question 28

3 basic task a fluorescent ballast must do

Answer 28

provide starting voltage
regulate current
control lamp voltage