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K-12 schools and on-site daycare are considered Type ________ by California’s energy Efficiency Standards.
Type E
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3 wire phase control is a dimming control signal that is commonly used with what type of lighting?
fluorescent and led lighting.
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Heat sinks are necessary to conduct heat away from what?
The LED
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It is most appropriate to use spaces and areas near windows and skylights for daylight harvesting and _________?
and lighting control systems.
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Lumen maintenance is used with what type of lighting?
a dimming lighting system uses lumen maintenance.
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Are T5 lamps shorter in length than T8 lamps?
yes
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Certain types of outdoor luminaries require automatic lighting controls to reduce their output when the space becomes vacant. When these are required, the luminaire must be reduced between _______and _______ % of full output.
40 and 80 percent.
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What does an astronomical time clock do?
It automatically adjusts on and off times based on season and location.
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What methods are used in the prescriptive approach to demonstrate compliance with the standards?
Area, complete building, and tailored method.
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What sensor detects motion through a change in ultrasonic sound waves? For this reason, such a device is not allowed within how many feet of HVAC vents?
An ultrasonic occupancy sensor. For this reason, such a device is not allowed within 4 feet.
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Illuminance is a measurement of what?
Illumanance is a measurement of how much light is striking a surface. Think of the word “Illuminate”.
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Fle power is found where?
in energy harvesting controllers that draw their power from the manual effort of pushing a switch.
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switching luminaries in response to available daylight is most often recommended for areas of _____________where occupants are not required to have long term visual concentration.
frequent occupant movement.
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The lifetime of an LED luminaire is dependent on_____?
heat
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Luminous intensity describes the intensity of light in how many directions?
one
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luminaries controlled by a low voltage lighting control system are wired to the?
lighting relay control panel.
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What is used to diffuse or direct the light emitted by the LED?
Optical elements
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The 2013 Building Energy Efficiency Standard defines “ any change to the building that increases the volume of the conditioned or unconditioned space” is what?
building addition
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Mesh networks can be what? Define a Mesh Network.
wired or wireless: A mesh network is a network topology in which each node relays data for the network. All mesh nodes cooperate in the distribution of data in the network. Mesh networks can relay messages using either a flooding technique or a routing technique. Wireless mesh networks often consist of mesh clients, mesh routers and gateways
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instead of an integral current limiter what is used?
a supplementary overcurrent protection panel. An integral current limiter looks like a rocker switch on a box at the end of track lighting to eliminate current loss.
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t5 lamps reach maximum light output at a higher or lower temperature as compared to other fluorescent lights?
higher.
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An automatic transfer switch does what regarding lighting?
Transfers a lighting circuit to an emergency power supply if normal power fails.
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A secondary side lit zone can best be described as what?
and area adjacent to a primary side lit zone.
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source efficacy in mathematical terms is what?
source lumens divided by power consumed.
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Luminance is a measurement of what?
light exiting a surface.
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What is the CRI (Color Rendering Index) of an 835 fluorescent lamp?
between 80 and 89
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areas >/= 100 square feet with connected lighting load >.5 W/sq ft must meet one of the following requirements.
- using the acronym MAD LT
- Manual dimming
- Automatic daylighting
- Demand response
- Lumen maintenance
- Tuning
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What is useful for saving energy in low occupancy spaces and is required to be used in less than 100 sq ft rooms or smaller in the state of California?
A timer switch.
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Mesh and star network topologies are often used with what?
Network lighting systems. Both wired and wireless.
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Daylight harvesting controls are required in certain space per the 2013 standard and they must reduce the electric lighting by at least ________% when sufficient daylight is available.
65%
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A partial off occupancy sensor turns off part of the lighting in an area during vacancy and back on during occupancy and must dim the lighting equal to at least ______%. The timeout must be no more than________.
- 50%
- 30 minutes.
- (not a vacancy sensor: automatic off/ manual on)
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A modular lighting control system is a ________?
distributed system that uses wired communication. (distributed system can also refer to battery power systems in power supply)
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Fluorescent ballast power factor is a measure of?
How efficiently (efficacy) electrical power is delivered to a lamp.
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Daylight harvesting controls are required in certain spaces per 2013 standards (ASHRAE 90.1) and must reduce the lighting by __________% when sufficient daylight is available.
65%
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The amount of time it takes half a set of flourescent test lamps to fail is what?
An average rated lamp life for a fluorescent lamp.
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What requires dimming ballasts or drivers for implementation?
tuning.
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Dimmers and occupancy sensors are regulated by California's?
appliance efficiancy standards.
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According to California's appliance efficiency standards, a dimmer cannot consume more than _______watt(s) in the off position?
1
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ASHRAE/IESNA 90.1 2010 requires occupancy sensors or timing switches in all __________.
small offices.
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Powerline carrier systems use the energized conductor for transmission of the __________.
control signal.
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Single stall bathrooms less than ________sq ft. are allowed the use of countdown timer switches to comply with the standards.
70
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3 wire phase control dimmers use how many hot wires?
2: one for switching and one for dimming.
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t5 lamps are how large in diameter and what about t8’s
t5 is 5/8 inch and t8 are one inch in diameter.
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two or more groups of lights controlled independently within the same space defines what?
multi-level switching.
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daylight harvesting regulates indoor lighting based on what?
available daylight.
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The current adopted minimum commercial energy code is?
ashrae/iesna 90.1 2010
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A universal voltage ballast can do what?
operate multiple voltages.
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When light output of an LED has decreased by 30% this defines what?
Average rated life.
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What type of relays are on e of the primary types of switching relay in a low voltage system?
2 wire, 1 coil electrically held.
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An instant start ballast delivers what type of voltage to instantly start a fluorescent lamp?
Very high.
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Magnetic and electronic fluorescent ballasts operate at ______ frequencies?
different.
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The most common type of control solution is what?
line voltage switching.
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two lighting systems that cannot operate at the same time in the same space defines what?
interlock lighting systems.
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dimming ballasats will only operate with what?
control systems of the same technology. IE: 0-10 volts, DALI, phase dimming, etc.
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Any LED equipped with a PWM driver is what?
dimmable.
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An LED driver isolates what?
the LED system from high voltage.
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To control a space from 5 locations you need what?
2 x 3 ways and 3 four ways. Note: you can only ever have 2 x 3 ways and as many 4 ways as you want.
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What will not respond to a change in indoor lighting levels?
open-loop sensing sytems.
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