Lighting, Emergency Systems And Unit Equipment

Question 1

What range of electromagnetic wavelengths makes up visible light?

Answer 1

400 to 700 nanometers (nm)

Question 2

How is the colour of light related to temperature?

Answer 2

The hotter the temperature of a blackbody is, the shorter the wavelength of light it gives off.

Question 3

Red is the (highest/lowest) temperature with the (longest/shortest) wavelength.

Answer 3

Lowest ; Longest

Question 4

Violet is the (highest/lowest) temperature with the (longest/shortest) wavelength.

Answer 4

Highest ; Shortest

Question 5

What unit describes the brightness of a light source?

Answer 5

Candela

Question 6

What does a lumen measure?

Answer 6

Quantity of light a source produces

Question 7

If 200 lumens fall on an area of 5 metres square, what is the illumination of this area in lux?

Answer 7

40 lx

200 lm / 5m^2 = 40 lx

Question 8

If a light source that requires 250W produces 21500 lumens, what is the efficacy of the source?

Answer 8

86 lm/w

21500 lm / 250W = 86 lm/W

Question 9

What material is used to make the filament of an incandescent lamp?

a) gold
b) titanium
c) iron
d) tungsten

Answer 9

d) tungsten

Question 10

What material is used to make the enclosure for the filament of a halogen lamp?

a) glass
b) acrylic
c) quartz
d) halogen

Answer 10

c) quartz

Question 11

What is the composition of the coating in the tube of a fluorescent lamp?

a) phosphor
b) fluoresce
c) xanthium
d) halogen

Answer 11

a) phosphor

Question 12

What are the two basic types of fluorescent lamps?

Answer 12

Linear and Compact

Question 13

What is different about the frequency of electronic ballasts compared to magnetic ones?

Answer 13

Electronic ballasts have a higher frequency than the standard 60 Hz of a magnetic ballast

Question 14

Which type of lamp is a metal-halide?

Answer 14

HID

Question 15

What does LED stand for in the lighting industry?

Answer 15

Light emitting diode

Question 16

How many 8ths of an inch is the diameter of a F28 T5/841 lamp?

Answer 16

5/8

Question 17

Which type of lamp would you expect this to be?

MH1500/BU

Answer 17

Metal Halide

Question 18

Which type of lamp would you expect this to be?

H37 KB-250

Answer 18

Mercury vapor

Question 19

Which ANSI ballast is indicated by the following label?

C70S62/D/M

Answer 19

S62

Question 20

Which ANSI ballast is indicated by the following label?

H44GS100

Answer 20

H44

Question 21

What does halogen do in an incandescent lamp?

Answer 21

It helps redeposit the tungsten back onto the filament for longer life

Question 22

What does the blackening on one end of a rapid start lamp indicate even if the lamp has only been on a short length of time?

Answer 22

It indicates a poor or loose connection and that the electrode is not receiving heating current

Question 23

What does the cycling of a LPS lamp indicate?

Answer 23

The lamp should be replaced

Question 24

What, besides a burnt out lamp, does a lamps failure to start indicate?

Answer 24

A bad ballast

Question 25

What are the two (2) main ways of restricting lamp changeability?

Answer 25

- Lamp base or pin type | - Warning labels

Question 26

What is the effect of replacing a lamp with another lamp that has the same electrical requirements, but different CCT?

Answer 26

Colour enhancement would change, so retail products may not appear as they should

Question 27

What is the maximum allowable branch circuit voltage-to-ground for a circuit in a dwelling unit?

Answer 27

150V

Question 28

What are the two (2) switching restrictions for luminaries located near combustible material?

Answer 28

- luminaries of the un-switched type | - luminaries controlled by a wall switch

Question 29

What precautions must be observed when installing a rigid luminaire within 2.1 m of the floor?

Answer 29

It must be protected from mechanical injury by guard or by location

Question 30

In a dwelling unit, a main floor stairway with four risers must have a luminaire controlled by 3-way switches located at the head and foot of the stairway. True or False

Answer 30

True

Question 31

What is the maximum allowable weight of a ceiling luminaire that is supported directly by an outlet box mounted on a bar hanger?

Answer 31

23 kg 30-302

Question 32

What is the minimum distance a recessed NON-IC luminaire enclosure must be away from a combustible material?

Answer 32

13 mm

Question 33

Which conductor must be attached to the screw shell of a lampholder?

Answer 33

The identified conductor