RETA CARO EXAM AND PRACTICE EXAM NEWEST 2024 ACTUAL EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+

Subcooled refrigerant can only be what - ANSWERS,Liquid Superheated refrigerant can only be ? - ANSWERS,Vapor Saturated refrigerant can be what? - ANSWERS,A liquid, vapor or a combination of the two What do you multiply the mass flow rate (lbs./min) by to determine the vapor flow rate through the compressor - ANSWERS,Specific volume (cubic ft./lbs) Three factors to consider when choosing a refrigerant are - ANSWERS,Cost, available, and safety One positive characteristic of halocarbon refrigerant is - ANSWERS,They are usually not flammable Which refrigerant requires the largest compressor displacement per ton - ANSWERS,R-134a What is not a direct symptom of air in an ammonia system - ANSWERS, What is the purpose of a refrigeration system? - ANSWERS,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? - ANSWERS,Basic physical principles, interpretation of information from temperature and pressure gauges, basic operating principles. Mechanical refrigeration is a series of steps that: - ANSWERS,Moves heat energy from a space or object to an area where it can do no harm. Heat energy always flows: - ANSWERS,from an object at a higher temperature to an object at a lower temperature Sensible heat: - ANSWERS,is heat energy that causes a change in temperature but does not cause a change of state. Latent heat: - ANSWERS,is heat energy that causes a change of state but does not cause a change in temperature. Which of the answers below is an example of heat transfer by convection? - ANSWERS,Warm air moving over an object