SOS Mechanic Certification- HVAC with 100% correct answers (latest update)

What should be used when installing o rings Refrigerant oil not the right answer which of the following is true about thermostat all the above moisture contamination inside the air conditioning system can cause all the above a vehicle has low heater output which of the following would not cause this output restricted of leaves not the right answer when charging r12 to r134 the performance of which component must increase the most condenser a overcharged air conditioning system is indicated by above normal gauge readings the high side reading is too high what should you do to correct this evacuate and recharge because there is air in the system in an air conditioning system the unit that removes moisture and heat from the air is the evaporator the refrigerant line going from the compressor to the condenser is the High pressure gas the refrigerant line going from the expansion valve to the evaporator is the Low pressure liquid the refrigerant line going from the evaporator to the expansion vale and it goes to the compressor is the Low pressure gas the refrigerant line going from the condenser to the receiver drier is the High pressure liquid The purpose of the receiver drier pick up tool all the above Create if you are checking for a slow leak on a AC system with r12 fully recharge the system before you start to check it when the blower is on high speed water vapor droplets come out of the air duct what does this indicate hose is plugged the ambient temperature switch is used to prevent the compressor from operating when The compressor runs hot not the right answer overcharging the AC unit will cause extremely high head pressure when you replace a AC compressor it is a good practice to all the above which one of the following is true about the AC system fittings for r12 are not compatible with r134a which one of the following would prevent the clutch from engaging all the above you have hooked up the gauges started the car and set the controls for Max AC the high and low readings are the same which of the following could cause this condenser an air conditioning system has been recharge several times should be all the above low 45 high 325 over charged which of the following would be used when finding leaks in the AC system both humidity high 90% and 90° high side 260 low side 42 what does these readings show operating normally which of the following is true thermostat question -5 degrees you'll see this answer when replacing a compressor clutch you should always check air gap high side 260 low side 30 humidity 90% and 90 degrees needs more refrigerant an AC system should be kept or plugged after it has been open to prevent system from being the entrance of moisture in dirt you have installed a new condenser it is also advisable to install a new receiver drier noise from a compressor clutch heard only when the compressor is engaged coolant level in the radiator is low coolant in the recovery tank is okay which of the following is the cause leak between the coolant tank and radiator and leak in the radiator not the right answer which of the following is true about a condenser all the above if the radiator cap vent at to load of pressure the likely result would be collapsed radiator hose a muffler on an AC system is used too reduce the noise from the condenser what component of the AC system remove moisture from the refrigerant reciever drier