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after a vacuum pump has been used, a continuous pressure rise in the system most likely indicates? - ANSWERexistence of a leak after a vacuum has been pulled to 500 microns, a pressure rise in a system, followed by a leveling-off at 1500 microns, most likely indicates? - ANSWERpresence of moisture on initial start-up of an air-conditioning system, the temp drop measured across the evaporator coil exceeds manufacturer's specifications. this condition most likely indicates a/an? - ANSWERlack of refrigerant charge the tech is on a spring maintenance check of an air conditioning system. they find the following: head pressure is higher than normal, suction pressure is higher than normal, superheat is 0, condenser is clean, outdoor fan operation is normal, subcooling is 25. what is most likely the problem? - ANSWERnon-condensables in the system in a compressor, the internal overload senses the winding temp and? - ANSWERamperage in the compressor circuit the function of an external equalizer line for a thermostatic expansion valve is to? - ANSWERreference the pressure at the evaporator outlet in a fixed orifice air conditioning system, the presence of non-condensables in the system will cause? - ANSWERhigh head and suction pressure which of the following could possibly cause a noisy reciprocating compressor? - ANSWERbroken internal spring