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A hydraulic unloader can reduce a compressor’s load on start-up.

If an in-line ammeter is accidentally connected in parallel, it may blow a fuse.

Match each of the following testing instruments with the statement that best describes it.

The from control inward method of troubleshooting starts the line voltage and moves through each switching device.

Unlike in-line ammeters, ohmmeters are connected in series with the circuit or load being tested.

The twisting force used to turn a compressor’s crankshaft is called efficiency.

An electric motor’s speed is determined by the alternating current’s frequency and the number of magnetic field poles in the stator.

In a low-pressure motor control, the cut-out and cut-in pressures are set to maintain proper ____.

A time-delay fuse may allow a motor to be damaged from high current before the time delay is over.

Which of the following statements about the terminals of a current relay is not true?