Which of the following accurately describes the danger of air in the refrigeration system?
A) The presence of air makes it impossible to connect a vacuum pump, which is necessary to perform the evacuation procedure.
B) Oxygen may violently react with hydrogen and potentially cause a fire within the refrigeration system.
C) Too much air makes it impossible to properly calibrate an analog vacuum gauge within the refrigeration system.
D) Oxygen will chemically react with the refrigeration oil and deposits buildup in the discharge valve area, causing compressor motor burnouts.
D
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If the stator windings of a motor are connected in delta during the starting period, the starting current will be ____________________ times the value if the windings were connected in wye.
Fill in the blank(s) with the appropriate word(s).
To three decimal places, find x in the accompanying figure. All dimensions are in inches.
A. 4.887 in B. 4.901 in C. 4.988 in D. 5.078 in
The practice of offering only selected clients reduced prices should be:
What will be an ideal response?
Why did the seeming idealism and hope of the early 1960s turn so sour by the end of the decade? Were liberal political leaders partially responsible for raising hopes too high, or was the Vietnam War primarily responsible for crushing liberal hopes and policies?
What will be an ideal response?