A buffer tube follows a color code that mimics the strand color code
A) blue, orange green, brown, aqua B) red, black, white, yellow, purple
C) blue, orange, green, brown, slate D) All of the above
C
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When charging a system that uses a zeotropic refrigerant, the system should always be charged using _____.
a. the superheat method b. the subcooling method c. vapor refrigerant from the cylinder d. liquid refrigerant from the cylinder
What is the name of the flexible coupling that allows two shafts to join and allow plunging?
A) Pot joint B) Plunge joint C) U-joint D) None of these
Which one of these op-amp terminals provides an output that is in-phase with the input?
A) non-inverting B) VCC C) inverting D) offset null
Which of the following is a condition of an air conditioning system that is undercharged?
A. increased possibility of floodback to the compressor B. higher operating pressures C. low operating pressures D. reduced evaporator superheat