Control Quiz On D2L Flashcards
Where would you find an averaging element
Across the face of a heating coil
Where is the best place to mount a fast response element with regards to off cycle defrost
Evaporator
What is the control agent in a residential furnace
Natural gas
What type of control system are relays and contactors considered
Electromechanical
What is the difference between the line duty and pilot duty overload device
Pilot duty interrupts the control current and line duty interrupts the line current
A fuse is what kind of device
Over current protection
Crankcase heater helps reduce refrigerant migration and oil frothing on start up
True
Bellows react to
Pressure
What type of sensor can be formed in a helix disk or spiral shape
Bimetal strip
What does a bellow react to
Pressure
A bourbon tube will straighten out as pressure increases
True
Bourdon tube is most used as
Refrigerant gauge
What is an example hygroscopic sensor
Nylon ribbon
What is the single parameter that represents the difference between the highest and lowest values the user can set the controller
Controller span
Another word for design condition
Controller set point
