Building Automation Lesson 6 Flashcards
5 comfort related properties
Temperature Humidity Circulation Filtration Ventilation
List three primary types of temperature- sensing elements which output an electrical signal
- Thermocouples
- Thermistors
- Resistance temperature detectors
What type of device is used to measure the amount of moisture in the air?
Hygrometer (%RH) percent relative humidity
____is used to compare the air pressure between two points within a duct. Which monitors fan operation or filter condition.
Differential pressure
What type of sensor measures the velocity of the air in a duct system?
Airflow station
What primary methods are used to improve indoor air?( 3)
Ventilation
Filtration
Source control
List devices that are commonly used to control temperature within a building?
Furnaces Boilers Chillers Heat pumps Air conditioners Electric heat sources
A___is a closed metal container that heats water to produce steam or hot water.
Boiler
What are the two main parts of an air conditioner?
Evaporator
Condenser
List three methods used for humidification in commercial buildings?
Steam jets
Flow-through metal filters
Drum- type humidifiers
What are the two main types of fan design?
- Centrifugal fans
- Axial-flow fans
What is the most common type of controller used for fan motors in new installations?
Variable frequency drive
What type of switch indicates a fully actuated damper position?
End switch
What is the most widely used type of pump in HVAC systems?
Centrifugal pump
Full-way valves are also called ____.
Shut off valves
