By what means does a two speed compressor motor accomplish the speed change?
What will be an ideal response?
The automatic changeover is accomplished with the space temperature thermostat and the proper compressor contactor for the proper speed.
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Why would an engineer decide to use a low temperature hot water system rather than a medium temperature design? Select all that apply.
A) The boilers are more efficient than medium temperature designs. B) Piping doesn't need to be insulated. C) They use smaller piping. D) Pipe expansion is easier to control.
An electrical contractor receives the following quantities of Braidx cable during the first quarter of the year: January, 7,500 feet; February, 10,750 feet; March, 4,500 feet. Find the total number of feet of Braidx cable received.
Fill in the blank(s) with the appropriate word(s).
Water hammer is a shock effect caused by:
A) Vacuums B) Destructive testing C) Liquid flow suddenly stopping D) Negative pressures
TIC-301 has an operating set point of:
a. 125ºF b. 135ºF c. 150ºF d. 212ºF