Actuator|the portion of a regulating valve that converts one type of energy into mechanical energy.  
Base speed|the rating given on a motor’s nameplate where the motor will develop rated horsepower at rated load and voltage.
Bleed control|a valve with a tiny opening that permits a small amount of fluid to pass.
Compensator|Cooling _________ is a fixed resistor installed in a thermostat to act as a cooling anticipator.
Deadband|a temperature band, usually 3-degrees F, that separates heating and cooling in an automatic changeover thermostat.
Differential|the difference between the cut-in and cut-out points of a thermostat.
Droop|a mechanical condition caused by heat that affects the accuracy of a bimetal thermostat.
E-P relay|a three-way pneumatic solenoid valve.
Fault isolation diagram|a.k.a. troubleshooting trees. 
IGBT|a type of transistor that has low losses and low gate drive requirements.
Invar®|an alloy of steel containing 36% nickel. One of two metals in a bimetal device.
Label|_______ diagram is a troubleshooting aid that normally depicts a wiring diagram, a component arrangement diagram, a legend, and notes pertaining to the equipment. 
Ladder|_______ diagram is a troubleshooting aid that depicts a simplified schematic diagram of the equipment.
P-E relay|a pressure switch in which a pneumatic signal causes an electrical change.
Wiring|_________ diagram is a troubleshooting aid that provides a picture of what the unit does electrically and shows the actual external and internal ___________ of the unit.