Compressor burnout - Study guides, Class notes & Summaries

Are there drop-in replacements for R-12 systems? Why or why not? - Answer-No because the new refrigerants are incompatible with the oils and lubricants used in R-12 systems. What type of oil is used in R-134a and what oils will it mix with? - Answer-Ester based oils and they do not mix with other oils What type of lubricant is used with HCFCs? - Answer-Alkylbenzene lubricant What is difference b/w ternary blend a azeotropic blend? - Answer-Ternary blends are three-part mixtures whereas aze...

Final Review RMO Exam Questions and Complete Solutions When instructed to start a reciprocating plant for Air conditioning the first thing to do is? A. TURN ON CHILLED WATER PUMPS AND OPEN THE BYPASS TO LIGHTER LOAD B. INSTALL LARGER FUSE TO TAKE THE INITIAL LOAD, AND THEN TURN ON THE COOLING TOWER FANS C. TURN ON CHILLED WATER PUMP, CONDENSER WATER PUMPS AND COOLING TOWER FANS D. SET THE THERMOSTAT A FEW DEGREES HIGHER - Answer: C. Turn on chilled water pump, condenser water pumps an...

A technician has determined a supply in a flexible duct system is leaking. What should be checked? - All connections inner and outer layers. Electronic air cleaners can operate with internal voltages as high as? - 5000v Why do some electromechanical type thermostats require connections to both the hot side and common side of the low voltage transfromer - Display lights must be powered using both sides of the line the continuity reading on a functional fuse will be - 0 ohms a compress...

What are the typical uses of the center port of gauge set? - ANSWERSUsed during evacuation, charging and recovery procedures. What color are the gauges on a manifold gauge set? - ANSWERSLow pressure is blue, High pressure is red. What are the typical ranges of pressure measurements used on the gauges of a manifold gauge set? - ANSWERSHigh side is 0 to 500 PSIG; Low side is 0 to 350 PSIG and 0 to 30 in. Hg below atmospheric pressure. Is the refrigerant leaving a condenser at a high or lo...

What are the typical uses of the center port of gauge set? Used during evacuation, charging and recovery procedures. What color are the gauges on a manifold gauge set? Low pressure is blue, High pressure is red. What are the typical ranges of pressure measurements used on the gauges of a manifold gauge set? High side is 0 to 500 PSIG; Low side is 0 to 350 PSIG and 0 to 30 in. Hg below atmospheric pressure. Is the refrigerant leaving a condenser at a high or low pressure? ...

EPA 608 Certification Study Guide HVAC Questions and Answers 100% A+ Graded Excel!!! Are there drop-in replacements for R-12 systems? Why or why not? - CORRECT ANSWER-No because the new refrigerants are incompatible with the oils and lubricants used in R-12 systems. What type of oil is used in R-134a and what oils will it mix with? - CORRECT ANSWER-Ester based oils and they do not mix with other oils What type of lubricant is used with HCFCs? - CORRECT ANSWER-Alkylbenzene lubricant W...

UPDATED EPA 608 QUIZLET (2024) FINAL EXAM |100% CORRECT| the state of the refrigerant entering the metering device is? *Ans* A subcooled high pressure liquid. what type of refrigerant is used in VERY high-pressure appliances? *Ans* R-503 what type of refrigerant is used in MEDIUM pressure appliances? *Ans* R-500 what type of refrigerant is used in HIGH pressure appliances? *Ans* R-410A and R-22 what device is located at the END of the liquid line? *Ans* The expansion device. what type o...

A __________ recovery device can be use for type 1 small appliance applications or type 2 applications if the total charge is below 15 pounds. - System dependent Always _____________ when connecting or disconnecting refrigeration hoses. - 1.) wear safety eyewear and butyl-lined gloves 2.) verify the hoses are rated for the refrigerant being used 3.) avoid trapping liquid refrigerant in the hoses To reach the necessary recovery level, when using a ________, it will most likely be essential t...

On a system with an operating compressor, recovery equipment must be capable of recovering; 90% refrigerant or achieving 4 inches of vacuum. A small appliance is defined by EPA as; Appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs or less of refrigerant. Recovery equipment must be; Certified by an EPA-approved testing laboratory. With a non-operating system compressor, recovery equipment must be capable of recovering; 80 percent of...

On a central gas furnace, which of the following conditions would cause the high limit control to open circuit ? - Answer Fan contol is open After replacing the compressor in a heat pump during the heating season, a technician must charge the system to the proper lvl. Which is the most accurate method ? - Answer Weigh in the exact charge A situation in which the flame on a gas furnace continually rolls out could be caused by - Answer A plugged heater exchange On heat pumps usin...