What is the most important operating characteristic to check whenever working on a water-cooled system?
What will be an ideal response?
The water flow.
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Depending upon the application, wire sizes are permitted to be as small as ____________________ AWG copper.
Fill in the blank(s) with the appropriate word(s).
Which of the following square junction boxes must be used if there is one 6" conduit and two 4" conduits entering on one side of the box and exiting at a 90° angle on another side of the box? (Assume the conductor size is No. 4 AWG or larger, but operating at less than 1,000V.)
a. 24" b. 30" c. 36" d. 44"
What is the temperature swing of an air sensing commercial refrigeration thermostat?
a. 2° b. 5° c. 10° d. 20°
Whenever a thermal limit or fusible link needs replacing, the technician should always check:
A) The thermostat calibration. B) The transformer control voltage. C) The power wire for voltage drop. D) The air filter and airflow.