Identify the incorrect statement in regards to PAG (polyalkylene glycol) oil:
A. PAG oil is hygroscopic.
B. PAG oil is easily mixed with any other refrigerant oil.
C. PAG oil can easily damage paint surfaces.
D. PAG oil should be kept in a clean container to prevent contamination.
Answer: B
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Electric heaters are ____% efficient, but given the cost of electricity and the fact that most of the source energy is coal, they are not a very green solution unless powered by renewable energy.
A. 75 B. 84 C. 93 D. 100
What is the purpose of a vacuum surge tank?
What will be an ideal response?
Why should you be sure that the fifth wheel plate is greased as required?
a. To reduce heat and noise. b. To prevent steering problems. c. To ensure good electrical connections.
In the figure above, symbol A represents a _____
a. float switch
b. temperature switch
c. pressure switch
d. foot switch