io 10 Flashcards
partially opening or closing
throttling valve
actuated by separate electrical circuit
relay
resistance temperature detector
RTD
one lumen per square foot
foot candle
current state based on control setting
open loop
difference between output control and set point
offset
speed at which air moves
air velocity
passive infrared sensor
PIR
Human machine interface
HMI
One lumen per square meter
Lux
change in aspect of system based on sensor information
controller
light emitting diode
LED
Air handling unit
AHU
Current state is based on feed back
closed loop
variable air volume
VAV
quality of light on surface area
illuminance
controls from one main control panel
centralized lighting control
on or off signal
digital (discrete)
desired value to be maintained
set point
heating ventilation and air conditioning
HVAC
Voice data video system
VDV
high intensity discharge lighting
HID
causes mechanical motion
actuator
measure the moisture in the air
hydrometer
range between 2 set points with no action
deadband
intensity of light radiating from a source
lumen
Air changes per hour
ACH
transmits an information signal
sensor
max power everytime unit is running
constant volume
variable frequency drive
VFD
rules and procedures for exchange of information
protocol
continuous signal
analog
switched between two power sources
transfer switch
which of the following is not a convenience function of an automation function
fire alarm
what type of control system uses only one controller to run all system logic
ddc control
secondary power is most commonly generated from
diesel generator
commonly caused transient voltage
contact balance
what type of lighting control system uses microprocessor based sensors and controls rather than microprocessor based control panel
Distributed lighting control
which of the following is not a component typically associated with a forced air handling unit?
Heat exchanger
which of the following conditions aids in keeping contagions from entering an isolation room
positive relative pressure
heating and cooling function of a HVAC system rely on basic principals of
thermal dynamics and heat transfer
list the items in which will often dictate automation priorities within a building
location
occupant density
equipment and products
special onset process
name the two main functions of control devices in electrical systems
1 - monitoring and maintaining a reliable quality power supply
2 - switching on and off electrical loads
list 3 primary temperature sensing elements which output an electrical signal
RTD
Thermal couples
Thermistors
name the five types of air air handling units manage
supply return exhaust mixed outside
what are the five requirements for comfort
temperature humidity filtration circulation ventilation
what are the 3 primary methods to improve indoor air quiality
ventilation
filtration
source control
name the two main parts of an air conditioner
evaporator
condenser
in a supply air control application there are 3 conditions which will require shut down of the supply air fan
low temperature limit
closed isolation damper
shut down command from fire system
