The term ______________________ indicates the source of heat while the system is operating in the heating mode and the medium that is ultimately being treated.
Fill in the blank(s) with the appropriate word(s).
air-to-air
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The risk of flash burn can be reduced by wearing _____.
a. long sleeves and buttoning the shirt all the way to the collar b. natural materials like wool or cotton c. a welding cap with the visor turned back d. safety goggles with a properly tinted lens
Computer fuel injection systems use ____________________ trim to continually adjust the air-fuel ratio in response to both immediate (short-term) and long-term conditions.
Fill in the blank(s) with the appropriate word(s).
One advantage of the wound-rotor induction motor compared to the squirrel-cage motor is that it has lower initial cost and maintenance costs.
Answer the following statement true (T) or false (F)
Which of the following statements about the installation of an auxiliary grounding electrode is correct?
A. It is permitted to be connected to equipment rather than an equipment grounding conductor when the manufacturer wants a “clean ground.” B. It is permitted to be installed at parking lot lighting metal poles rather than connecting an equipment grounding conductor from the branch circuit. C. It is permitted to supplement but not replace the equipment grounding conductor with the branch circuit. D. The installer has the option of either installing the equipment grounding conductor or the local grounding electrode or both.