Power Distribution

Question 1

Which of the following terms defines a quaintly of light?

Answer 1

Luman

Question 2

What unique element do high intensity discharge lamps have?

Answer 2

Resistance decreases as the lamp heats up

Question 3

On the high pressure mercury lamp, what is the inner arc tube constructed from?

Answer 3

Quartz

Question 4

Which of the following is not a use for Mercury lamps?

Answer 4

Indoor lighting

Question 5

Which of the following lamps has the highest light producing efficiency?

Answer 5

High pressure sodium lamps

Question 6

What is he arc tubes constructed of in high pressure sodium lamp?

Answer 6

Alumina ceramic

Question 7

What type of gas is used in association with the high pressure sodium lamp?

Answer 7

Xenon

Question 8

What material is used to coat he inside of a fluorescent lamp?

Answer 8

Phosphor

Question 9

What are the three roadway classifications used in street lighting?

Answer 9

Local, collector, and major

Question 10

How many different types of selection of luminary patterns are there?

Answer 10

5

Question 11

The transverse direction is defined as?

Answer 11

Up and down and the length of the road

Question 12

Luminaire overhang should not exceed what percentage of the mounting height?

Answer 12

25%

Question 13

The utilization curve shows the amount of light that falls on the roadway?

Answer 13

True

Question 14

The amount of luminous energy is also know as?

Answer 14

Flux

Question 15

What does HID stand for?

Answer 15

High intensity discharge lamp

Question 16

Advantages of HID lamps?

Answer 16

Longer lamp life and more light per watt

Question 17

There are three basic types of HID lamps used in area lighting?

Answer 17

Mercury lamps, metal Halide lamps, and high pressure sodium lamps.

Question 18

Within in the HID lamps have 3 electrodes?

Answer 18

One acting as a cathode, anode, and the other as a starting

Question 19

The arc tube of a Mercury lamp contains a small amount of?

Answer 19

Pure argon gas

Question 20

Mercury lamps for lighting applications range in wattage from ?

Answer 20

40 to 1000 watts

Question 21

What watt range is the most popular for Mercury lamps?

Answer 21

175 to 400 watts

Question 22

Mercury lamps are being replaced with mor efficient?

Answer 22

Metal halide or high pressure sodium lamps

Question 23

What does a metal halide arc tube made out of?

Answer 23

Quartz

Question 24

What do metal halide arc tubes contain?

Answer 24

Halide salts

Question 25

The result of the halide salts increase in efficiency of approximately ______ percent over that of a Mercury lampoon the same wattage, as well as excellent color quality from the arc.

Answer 25

50 percent

Question 26

High pressure sodium lamp has the highest light producing efficiency of any commercial white light. True or false

Answer 26

True

Question 27

High pressure sodium lamps are available in sizes from?

Answer 27

35 to 1000 watts

Question 28

Where is fluorescent lighting needed?

Answer 28

Low level, highly diffused light is desired. Examples club parking lots, outside shopping areas, parks or grass areas.

Question 29

Fluorescent tube has a coating of material called?

Answer 29

Phosphor

Question 30

What do ballast in a HID lamp provide?

Answer 30

3 basic functions. To control lamp current to the proper value To provide sufficient voltage to the start of the lamp And to match the lamp voltage to the line voltage.

Question 31

Ballast are classified into three major categories depending on the basic circuit involved. What are the three?

Answer 31

Non regulating, lead type regulating, and lag type regulating.

Question 32

The end life characteristics for the Mercury lamp is?

Answer 32

Is a non start condition or low light output

Question 33

The end life characteristics for the Metal halide lamp is?

Answer 33

Non start condition, ballast can no longer sustain the lamp. Lamp color at the end of life will be warmer (pinker) than that of a new lamp.

Question 34

The end life characteristics for the high pressure sodium lamp is?

Answer 34

On and off cycling, because of the voltage and ballast

Question 35

4 basic visual variations in a lamp of a hid lighting systems that indicate a problem.

Answer 35

The lamp does not start The lamp scale is on and off The lamp is extra bright The lamp is dim

Question 36

IES stands for?

Answer 36

Illuminating engineering society

Question 37

Streets are classified into three major categories?

Answer 37

Major, collector, and local

Question 38

What is major defined as?

Answer 38

The part of the roadway system that serves as the principal network for through traffic flow.

Question 39

What is collector defined as?

Answer 39

Distributor and collector roadways serving traffic between major and local roadways.

Question 40

What is local defined as?

Answer 40

Roadways used primarily for direct access to residential, commercial, industrial, or other property

Question 41

Locality or area I'd also defined by three major categories?

Answer 41

Commercial, intermediate, residential.

Question 42

Unit of luminous intensity is also know as?

Answer 42

Candela