Building Automation Lvl 2 Flashcards
A ____ is a temperature-sensing element consisting of two dissimilar metal wires joined at the sensing end. Produces a very small voltage when heat is applied to it.
A ____ is a temperature sensing element made from semiconductor material that changes its resistance in response to different temperatures.
What are some ways that ‘Resistance Temperature Detectors’ are different than thermistors?
- ) They are made from different materials (commonly platinum)
- ) Lower resistance
- ) Wider Range
- ) Slower response to temperature changes
A ____ is a switch that activates at temperatures above or below a given set point.
A ____ is a device that measures the amount of moisture in the air.
Most hygrometers measure air moisture in percentage of ____-____.
Percentage of Relative Humidity. (%RH)
A ____ is a switch that activates at any humidity level above or below a given set point.
____ pressure is measured when you contrast the pressure readings of two separate points in a duct.
What is a transducer?
A device that converts one form of energy to another form of energy.
A(n) ____ measures the velocity of air within a duct.
A ____ is a closed metal container that heats water to produce steam or hot water.
What are the two parts of an air conditioner?
- ) Evaporator
2. ) Condenser
A ____ heat pump uses the ground (below the frost line) as a heat source and heat sink.
A ____ is a water distribution pipe that routes a water supply vertically one story or more.
A ____ is a fitting that regulates the flow of water within a piping system.
Water flow can be measured as ____ or ____.
- ) Flow Rate
2. ) Total Flow
A ____ is a watertight, thermally conductive case for immersion-type temperature sensors within pipes, vessels, and fixtures.
Pumps that are installed to draw water from wells, empty sump pits, or to operate plumbing appliances would be classified as ____ - operated pumps.
What type of pump creates flow by trapping a certain amount of water in a chamber, and then forcing it out through a discharge outlet?
A positive displacement pump.
What type of valve controls water flow by partially opening or closing?
A Throttle Valve