What is the drawback of emergency heat?
A) The supplemental heat costs more to operate than a heat pump.
B) It activates the supplemental heat in the first stage.
C) It causes problems with the refrigeration systems.
D) The compressor and outdoor fan are not energized.
A
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Compression joints use a rubber gasket to join ductile bell-and-spigot pipe. The gaskets come in two weights: _____.
a. extra light and extra heavy b. horizontal and vertical c. four-point and six-point d. service weight and extra heavy
?Welding ____________________ operate machines or automatic equipment used to make welds.
Fill in the blank(s) with the appropriate word(s).
OBD-II equipped vehicles are required to turn on the malfunction indicator lamp if the system has detected an exhaust emission level that is ________ the FTP limit
A) 1.5 times less than
B) The same as
C) 1.5 times or higher than
D) None of these
What refrigerant is currently being used in refrigeration equipment?
A. R-12 and R-404a B. R-22 and R-502 C. R-134a and R-12 D. R-134a and R-404a