Hvac exam Questions With 100% Correct Answers.

1. Type II - Evaporator coil replacement is alwyas considered "major" repair 2. Type II - Remove refridgerant recovered in a vapor phase will minimize the loss of oil 3. Type 2 - Remove refridgerant from the condenser when the condenser is below the reciever 4. Type 2 - By removing as much refridgerant in the liquid phase as possible can save time 5. Type2 - Before using recovery unit to remove a charge: check the service valve: evacuate recovery unit?reciever : check recovery unit oil level 6. Type 2 - When drawing a deep vacuum recycle/recovery equipment using hermetic compressors have high potential to over heat because the motor relies on the flow of refridgerant through the compressor for cooling 7. type 2 - air cooled condenser on roof of building: ecaporator on the first floor recovery should start from the liquid line entering the evaporator 8 type 2 - State of refrigerant leaving the reciever of refrigeration system is high pressure liquid 9 type 2 - R12,R134a,R11 should be monitored under ASHRAE Standard 15 10 type 2 - the vacuum pump should be capable of pulling a vacuum of 500 microns when evacuating a vapor compression system 11 type 2 - wait a few minuites to see if pressure rises indicating still refrigerant in liquid form or in oil after reaching the required revovery vacuum on an applicance12 Type 2 - Pressure relief device should protectevery refrigerant system 13 type 2 - replace filter drier if a system is opened for servicing 14 type 2 - because of an open equalization connection refrigerant cannot be recoverd without isolating a parallel compressor system