HVAC Final Study Guide part 1 Complete Questions & Answers(GRADED A+)

This compressor uses pistons and valves to compressor refrigerant. - ANSWER Reciprocating This compressor uses vanes to compress refrigerant. - ANSWER Rotary compressor This compressor is the latest technology for compressor design - ANSWER Scroll pump The manifold gauges should be in this position to pull a vacuum - ANSWER They should all be open What is standing pressure used for? - ANSWER To let you know that there is enough refrigerant to start the system What valve on a reciprocating compressor usually is damaged due to liquid slugging? - ANSWER Suction Valve How do you figure low side running pressure for any refrigerant? - ANSWER -40 degrees from evaporator ambient temperature What compressor deals with liquid refrigerant by bypassing it into the discharge line? - ANSWER Scroll Compressor Can a reciprocating compressor work if the motor is wired to run backwards? - ANSWER Yes How many degrees do you add to the condenser ambient for R-410A when figuring high side running pressure? - ANSWER C/A +25 degrees What are the 4 basic parts of any refrigeration system? - ANSWER Evaporator, metering device, condenser, compressor Which refrigerant line will burn you if you touch it? - ANSWER Discharge line Why is the Suction line always insulated? - ANSWER To prevent anymore heat absorption Where should the suction line leave the evaporator? - ANSWER At the bottom Where should the sprayed refrigerant enter the evaporator? - ANSWER At the Top What line leaves at the bottom of the condenser? - ANSWER Liquid line Where is a king valve located? - ANSWER Next to the liquid receiver, outlet of the liquid receiver What is the purpose of a liquid line filter drier? - ANSWER To remove contaminants What is the purpose of the suction line accumulator? - ANSWER To prevent liquid from returning to the compressor