Which of the following oils is used in an original equipment R-134a system?
A. Mineral oil
B. CCOT
C. Ester oil
D. PAG
Answer: D. PAG
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Which - type of service shop is least likely to provide service to all makes and models of vehicles?
A) Tire store B) Chain store C) Independent repair shop D) All of the above E) None of the above
Which of the following statements is false?
A. The Lewis-Randall rule states that when the mixture is modeled as an ideal solution, the mixture fugacity of component i is equal to the pure component fugacity of component i, multiplied by the mole fraction of component i in the mixture. B. The activity coefficient of component i in a mixture is the mixture fugacity of component i divided by the mixture fugacity of component i if treated as an ideal solution. C. The mixture fugacity must carry units of pressure (Pa, kPa, MPa, …). D. The mixture fugacity of component i will be the same value in all of the phases where it appears in phase equilibrium. E. None of the above are false.
____ indicates a filler metal that is used as a current carrying electrode, as a rod, or both.
A. R B. B C. RB D. IN
RC integrators can be used to convert a repetitive pulse waveform to a constant dc voltage equal to the average voltage of the waveform if:
A) ? is very large compared to tW. B) ? is very small compared to tW. C) ? is equal to tW. D) ? is five times tW.