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7 Cards in this Set
- Front
- Back
When Moisture is present in a refrigeration system, it will react with the refrigerant and oil to form |
ACIDs, Hydrofluoric, Hydrochloric |
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Which of the following represents the lowest vacuum? a. 1 "Hg b 1000 microns c. 5,000 microns |
c. 5,000 microns |
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To pull vacuum means to ______________________________________ a. turn on the vacuum cleaner b. increase the pressure on a system while using the vacuum c. Lower the pressure below atmospheric pressure in the system |
C. Lower the pressure below atmospheric pressure in the system. |
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A compound gauge will read ______________.
a. Only above atmospheric pressure b. compound pressure c. above and below atmospheric pressure |
c. Above and below atmospheric pressure |
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A Micron gauge is used to determine?
a. pressures above atmospheric b. pressures below atmospheric c. Thickness of a metal plate |
b. pressures below atmospheric |
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Non condensable gases in the system will cause?
a. No problems b. High head pressure c. Low head pressure |
b. High Head pressure |
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What is the most accurate instrument for checking a deep vacuum?
a. manifold gauges b. U tube manometer c. Digital micron gauge |
c. digital micron gauge |