A technician uses an ohmmeter to check resistance and for a complete path in the electrical circuit, also known as:
A) Reactance. B) Capacitance. C) Amperage. D) Continuity.
[Ques. 2] An R-22 system is operating with a liquid pressure of 226 psig (110 saturation temperature). The specified system subcooling is 5F. The liquid-line temperature should be:
A) 115F. B) 105F. C) 110F. D) 100F.
[Ques. 3] More charge should be added to a system if:
A) The system subcooling is more than 1F lower than specified.
B) The system subcooling is exactly the same as specified.
C) The system subcooling is more than 1F higher than specified.
D) The system subcooling is less than 1F higher than specified.
[Ques. 4] What specification on the unit data plate should be used to size the power wire?
A) The rated load amps (RLA) B) The maximum overcurrent protection (MOCP)
C) The locked rotor amps (LRA) D) The minimum circuit ampacity (MCA)
[Ques. 5] An air-conditioning system charged with R-410A is operating with a suction pressure of 130 psig, which equates to a 45F saturation temperature. If the manufacturer calls for a 15F superheat, what should the suction line temperature be?
A) 130 psig - 15F = 115F suction line temperature B) 45F + 15F = 60F suction line temperature
C) 130 psig + 15F = 190F suction line temperature D) 45F - 15F = 30F suction line temperature
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