The three major electrical defects in compressor motors that can be identified using an ohm meter are:
A) Single phasing, dual phasing, and three phasing.
B) Open, shorted, or grounded.
C) Phased, unbalanced, or blown.
D) Locked, under capacity, and unbalanced.
B
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There are three kinds of attic ventilation: power, natural, and ____________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is an advantage of a maintenance-free lead acid battery compared with a similarly sized and rated standard battery?
A. higher CCA B. sustains overcharging without failing C. longer inactivated shelf life D. all of the above
The __________ is the most popular heat source used by air conditioning, heating and refrigeration technicians.
A. air-acetylene torch B. MAPPTM gas torch C. propane gas torch D. oxy-acetylene Torch
What type of gas is used to pressurize new ACR piping circuits for leak detection purposes?
A. oxygen B. carbon dioxide C. nitrogen D. refrigerant