If the low-side pressure drops below a safe limit due to refrigerant loss or an evaporator freeze-up, a(n) ____ switches off the compressor motor.
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The temperature or pressure value at which a device begins o…
The temperature or pressure value at which a device begins operation is its ____.
Which type of relay prevents a circuit from restarting until…
Which type of relay prevents a circuit from restarting until the power to its coil is interrupted?
A ____ switch is one that must be actuated to provide power…
A ____ switch is one that must be actuated to provide power to a circuit.
On a capacitor-start, induction-run motor, a centrifugal swi…
On a capacitor-start, induction-run motor, a centrifugal switch or relay disconnects ____ when the motor reaches about 75% of its rated speed.
Slip is the difference between a motor’s synchronous speed a…
Slip is the difference between a motor’s synchronous speed and its rated ____ speed.
Advantages of ECMs include the following, except ____.
Advantages of ECMs include the following, except ____.
To reverse a three-phase motor’s direction of rotation, a te…
To reverse a three-phase motor’s direction of rotation, a technician must disconnect two power leads and connect each one to the ____.
Which type of single-phase induction motor has the starting…
Which type of single-phase induction motor has the starting torque to start under heavy loads?
A VFD controls an induction motor’s speed by changing ____.
A VFD controls an induction motor’s speed by changing ____.