RETA

RETA CARO EXAM QUESTIONS WITH 100% VERIFIED ANSWERS Which refrigerant has the highest mass flow requirement at the same evaporator and condensing temperature? CFC-12 which refrigerant is the first to be phased out by Montreal Protocol CFC-12 As the ratio between the evaporator and condensing pressure increases the theoretical discharge temperature increases Under the Montreal Protocol as long as a technician does not perform work on the refrigerant containing portions of a sy...

RETA CARO Exam Questions With Answers What is the purpose of a refrigeration system? To maintain a temperature Operators must keep refrigeration systems operating safely and efficiently. Which of the following best describes the areas of required knowledge for this to be possible? Basic physical principles, interpretation of information from temperature and pressure gauges, basic operating principles. Mechanical refrigeration is a series of steps that: Moves heat energy from a spac...

RETA CARO Chapter 2 Exam With Complete Solutions Four required components of a mechanical refrigeration system Expansion device, evaporator, compressor, condenser Purpose of the Expansion Device 1) To separate the high pressure side of the system and the low pressure side of the system 2) Responsible for metering the proper amount of liquid into the evaporator Flash Gas The vapor that results from the expansion process (no practical cooling is done by this item) Purpose of Ev...

RETA CARO Chapter 1 Exam Questions With Verified Solutions Purpose of a Refrigeration System Achieve or maintain proper temperatures in a refrigeration process used for cooling/freezing applications Ton of Refrigeration Rate BTUs transfer per unit time 288,000 BTUs/24 Hours 12,000 BTUs/12 Hours 200 BTUs/1 Minute rate of refrigeration or cooling Pressure Force per unit area. PSIA Absolute pressure; measures pressure from zero pressure PSIG Gauge pressure, uses atmo...

Reta Caro Study Guide JH Exam Questions With Verified Solutions Which is equal to 22 Psig? 36.7 Psia What is the Latent Heat of Vaporization?(H2O) 970 Btu's What product requires the most energy to lower 1 lb. by 1 degree? water What happens when pressure on a liquid is increased? Boiling point goes up/Saturation temp. goes up What happens when vapor is Superheated? Temperature above saturated/it gains sensible heat 0.5x1 degree F What causes heat to move from one...

Reta Test 1 Exam With Verified Solutions what does temperature indicate intensity of heat energy in an object what is required to move heat from one object to another temperature difference which of these is required to obtain a valid reading from a pressure temperature chart the refrigerant must be in a saturated condition which of these is an essential component of a mechanical refrigeration system expansion device what is a function of a compressor in a mechanical re...