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CE Exam MARCH CYCLE > Power Distribution > Flashcards

Power Distribution Flashcards

1
Q

Which of the following terms defines a quaintly of light?

A

Luman

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2
Q

What unique element do high intensity discharge lamps have?

A

Resistance decreases as the lamp heats up

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3
Q

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

A

Quartz

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4
Q

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

A

Indoor lighting

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5
Q

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

A

High pressure sodium lamps

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6
Q

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

A

Alumina ceramic

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7
Q

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

A

Xenon

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8
Q

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

A

Phosphor

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9
Q

What are the three roadway classifications used in street lighting?

A

Local, collector, and major

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10
Q

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

A

5

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11
Q

The transverse direction is defined as?

A

Up and down and the length of the road

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12
Q

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

A

25%

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13
Q

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

A

True

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14
Q

The amount of luminous energy is also know as?

A

Flux

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15
Q

What does HID stand for?

A

High intensity discharge lamp

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16
Q

Advantages of HID lamps?

A

Longer lamp life and more light per watt

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17
Q

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

A

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

18
Q

Within in the HID lamps have 3 electrodes?

A

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

19
Q

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

A

Pure argon gas

20
Q

Mercury lamps for lighting applications range in wattage from ?

A

40 to 1000 watts

21
Q

What watt range is the most popular for Mercury lamps?

A

175 to 400 watts

22
Q

Mercury lamps are being replaced with mor efficient?

A

Metal halide or high pressure sodium lamps

23
Q

What does a metal halide arc tube made out of?

A

Quartz

24
Q

What do metal halide arc tubes contain?

A

Halide salts

25
Q

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.

A

50 percent

26
Q

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

A

True

27
Q

High pressure sodium lamps are available in sizes from?

A

35 to 1000 watts

28
Q

Where is fluorescent lighting needed?

A

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

29
Q

Fluorescent tube has a coating of material called?

A

Phosphor

30
Q

What do ballast in a HID lamp provide?

A

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.

31
Q

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

A

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

32
Q

The end life characteristics for the Mercury lamp is?

A

Is a non start condition or low light output

33
Q

The end life characteristics for the Metal halide lamp is?

A

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.

34
Q

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

A

On and off cycling, because of the voltage and ballast

35
Q

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

A

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

36
Q

IES stands for?

A

Illuminating engineering society

37
Q

Streets are classified into three major categories?

A

Major, collector, and local

38
Q

What is major defined as?

A

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

39
Q

What is collector defined as?

A

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

40
Q

What is local defined as?

A

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

41
Q

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

A

Commercial, intermediate, residential.

42
Q

Unit of luminous intensity is also know as?

A

Candela

CE Exam MARCH CYCLE (5 decks)

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