Define predictive maintenance
A) Monitoring key performance indicators and performing maintenance when these indicators show a need for maintenance
B) Performing maintenance and testing whenever the system quits operating correctly
C) Replacing all system components on a rotating basis
D) Performing maintenance and testing based on a regular schedule
A
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The subsequent problems with the circuit below where R1 = R2 = R.
If a real voltmeter, with input impedance 2R, is used to measure the voltage between node A (red or positive lead) and node B (black or negative lead), the displayed value will be
A. 2V / 5 B. 2V / 3 C. 0 D. 3V / 4 E. V
When metering in zeotropes, why must the liquid flash off to vapor before entering the compressor?
A) Ensure the unit and cylinder remain in a saturated state B) To prevent too much liquid from damaging the compressor C) To prevent the system from freezing solid D) To ensure maximum efficiency throughout the system
When doing a cost analysis, it?s important to identify the _____
a. point at which data is gathered b. frequency when tasks occur and data is collected c. factors that will reduce estimated costs d. actual unit costs
When checking thermostat circuits, an insulated jumper wire is a handy tool.
Answer the following statement true (T) or false (F)