Rac 40 quiz 4 review - Study guides, Class notes & Summaries

RAC 40 Quiz 4 Review with Complete Solutions (Graded A+) Which of the following statements is correct when referring to large refrigerant or nitrogen tanks? - Answer- Large tanks should not be carried, they should be secured to an approved cart. The protective cap must be on when the tank is not in use. Safety goggles or glasses must be worn when moving the tank. A double insulated drill _____. - Answer- Generally has a plastic case with the electrical connections and motor insulated withi...

RAC 40 Quiz 4 Review Questions | Latest Version | 2024/2025 | 100% Verified What is the main property of a refrigerant that allows it to change from liquid to gas? The main property is its low boiling point, which allows it to evaporate and absorb heat at low temperatures. What is a common environmental concern associated with certain refrigerants? Certain refrigerants contribute to ozone depletion and global warming. What is the difference between a CFC and an HFC refrigerant? ...

RAC 40 Quiz 4 Review - Questions and Answers When transferring refrigerants from a cylinder to a refrigeration system or any other container you should always wear ______. Goggles with side shields and gloves A fusible plug is a metal fitting that has a hole drilled through it and the hole is filled with ______. Material with a low melting point When it is necessary to perform electrical work in an area that has a damp or wet floor, which of the following can be done to minimize the chance of e...

RAC 40 Quiz 4 Review Study Guide Test 2024. When transferring refrigerants from a cylinder to a refrigeration system or any other container you should always wear ______. - CORRECT ANSWER Goggles with side shields and gloves A fusible plug is a metal fitting that has a hole drilled through it and the hole is filled with ______. - CORRECT ANSWER Material with a low melting point When it is necessary to perform electrical work in an area that has a damp or wet floor, which of the follow...

RAC 40 Quiz 3 Review Semester 1 2024. The _____ compressor is another positive displacement compressor and is used for larger air conditioning and refrigeration applications. - CORRECT ANSWER Screw Compressor The four (4) major components of a vapor compression refrigeration system are the compressor, condenser, evaporator, and ________ ______. - CORRECT ANSWER Metering device The amount of heat a refrigerant contains with -40F as the 0 heat content reference point is called - CORRECT...

RAC 40 Quiz 3 Review Questions with Correct Answers (Already Graded A+) What is another word for flash gas? - Answer- Adiabatic expansion What is the meaning of THOR? - Answer- Total heat of rejection What will high discharge temperatures affect your compressor? - Answer- It will cause the oil temperature to rise and create acid. Acid will eat at the winding in the compressor and cause a short. Name the 4 positive displacement compressors. - Answer- Reciprocating, Rotary, Scroll, Scr...

RAC 40 Quiz 7 Review Questions and Answers All Correct When When making a swage joint, what should the depth of the enlarged portion of the tube be? - Answer- Depth depends on the diameter of the tubing and should have the same measurements as the diameter of the tubing The type of steel pipe thread used primarily in this industry is the "tapered" thread. Why? - Answer- tapered has a better fit When soldering, what is the flow of molten filler material between the two base metals ca...

RAC 40 Quiz 8 Review Questions with 100% Correct Answers What are some ways they can increase the productivity of the dehydration and evacuation process? list all you can think of - Answer- -purge system with nitrogen before pulling vacuum -heat up and kick compressors to get out all the moisture and oil from underneath -use copper tubing instead of vacuum hoses -make sure vacuum pump oil is new and vacuum pump When non condensables and moisture are left in a system hydrochloric and hy...