Electrical systems

Which phone system is best to achieve total internal control over the system for high security environments?

On-Premise PBX

Which phone system is best to achieve Scalability and no hardware maintenance?

Cloud VoIP

Which phone system is best to extend the life of existing hardware for transitioning businesses?

Hybrid

Most modern communication and control systems are classified as?

50V or below, Extra Low-Voltage (ELV)

This system will provide extremely high data speed/bandwidth over very long distances:

Fiber Optic

This system will provide high data speed/bandwidth but is limited to distances of less than 100 meters:

Twisted Pair

This system will provide low to moderate data speed/bandwidth but does not require additional cables because it uses existing power wires:

PLC

Which system is highly secure and can also deliver power to devices (PoE)?

Twisted Pair

Which system is prone to 'dead zones' and interference?

Wireless

This system is generally the most expensive cost for installation:

Fiber Optic

The replaceable component that converts electricity into light is a:

Lamp

The fixture that makes up the complete lighting assembly is a:

Luminaire

Lighting that can be easily moved is:

Portable Luminaires

Fixtures installed in a ceiling or wall so they are flush with the surface are:

Recessed Luminaires

High output fixtures designed for safety and durability in warehouses or factories are:

Industrial Luminaires

Hanging units often used in dining or kitchens intended to make a statement are:

Pendant Luminaires

The lumen output of a directional light source measured within a field angle is:

Field Lumens

The rated light output when a fixture is new is:

Initial Lumens

The light output after a fixture has been used at some point of their rated life is:

Mean Lumens

Lamp life can be shorter than rated life due to:

All of the above

Color Temperature has a direct relationship to wavelength of light:

False

Lower Color Temperature produces:

Warmer Light

The visual spectrum of this type of light is balanced across the entire visible spectrum:

Daylight

Daylight color temperature (5000K to 6500K) is best for:

Offices, Garages and craft rooms

Warm White color temperature (2700K to 3000K) is best for:

Living Rooms, bedrooms and dining areas

The perceived color of an object being lit by a light source is:

Color Rendering Index

The intensity of a light source is:

Brightness

The 'warmth' or 'coolness' of a light's appearance is:

Color Temperature

Incandescent lamps usually perform better than fluorescent lamps with regard to:

CRI (Color Rendering Aspect)

Incandescent lamps are a good choice when:

All of the above

Initial lumen rating for Fluorescent lamps is given:

Has operated for 100 hours

Which Fluorescent Lamp has the highest efficacy?

T5 lamps

Benefits of replacing T12 lamps with T5 or T8 lamps include:

All of the above

What is a disadvantage of HID and Fluorescent lamps?

They contain Mercury.

Which type of lamp requires a ballast to operate?

Fluorescent

Which lamp typically has the highest efficacy?

LED

What happens when dimming LED lamps?

They may not dim to 0% and may cut out suddenly.

What factors impact the payback period for replacing lamps with LED?

Operating hours, Maintenance Savings, Utility Rebates

What type of solar collectors operate at lower temperatures and efficiencies?

Flat Plate collectors

What type of solar collectors concentrate light onto a smaller absorber?

Parabolic and lens collectors

What type of solar collectors require precise optical alignment?

Parabolic and lens collectors

How long did it take to achieve the second terawatt of solar capacity?

2 years

Which solar system is more efficient but produces lower grade heat?

Solar Hot Water (Thermal)

What type of piping arrangement is used to empty solar collectors?

Drain-back system

What system protects solar collectors from freezing and boiling?

Drain-back system

What is the most efficient heating system for space heating?

Heat Pumps

Air source heat pumps are more efficient at heating with what outside air temperatures?

Higher

What heat rejection methods can Heat Pumps utilize?

Air to Refrigerant Finned-tube, Condenser Water with Cooling Tower, Condenser Water with Ground Coupled vertical-loop

What is allowed by the NEC for grounding a building's electrical system?

Grounding through a metal water pipe

What devices protect systems from high current?

Circuit Breakers and Fuses

What color are neutral wires typically?

White or Gray

What color are ground wires typically?

Yellow/Green, Green or bare copper

What color are hot wires typically?

Black or red

What does a 10 dB increase in noise represent?

10 fold increase

What does an increase from 10 dB to 30 dB represent?

100 fold increase

What is the sound level scale adjusted for human hearing?

dBA

What is the standardized rating system for indoor background noise levels?

NC

In a classroom, diffusers should be selected in which NC range?

25-30

In an Open Office, diffusers should be selected in which NC range?

35-40

In a Recording Studio, diffusers should be selected in which NC range?

15-20

What do passive noise control devices work best on?

High frequencies

What do active noise control devices work best on?

Low frequencies

What are the characteristics of active noise control devices?

Require maintenance, can fail if components stop working, typically more expensive