Mixed refrigerant should Study guides, Class notes & Summaries

Type I certification allows the certified person to work on the following type of systems Small appliances 5 pound or less excluding split systems When retrofitting or converting a system to use a different refrigerant, only EPA-approved substitutes can be used. Many refrigerants are said to be a "direct drop in replacement refrigerant" What does the EPA state about drop in refrigerants? There is no such thing as a drop in refrigerant. Recovery equipment used during service, ma...

be connected as far away from the pump as possible a high capacity vacuum pump and short, large diameter hoses will dramatically reduce emissions, pressure drop, and evacuation/dehydration time ozone contains three oxygen atoms one chlorine atom can destroy 100,000 ozone molecules CFC's do not dissolve in water and do not breakdown into other compounds that dissolve in water CFC's cannot be washed out of the lower atmosphere ODP ozone depletion potentia...

EPA 608 Type II - Questions and Answers R-410A requires recovery tanks rated for at least: ______. a) 240 psig b) 300 psig c) 400 psig d) 500 psig A routine maintenance task which must be performed on refrigerant recycling machines is to: __________. a) check compressor seals b) change electrical fuses c) replace moisture sight glass d) change filter and compressor oil (if any) Pressure relief valve must not be: ______. a) installed in series b) installed in parallel c) installed vertically d)...

EPA 608 CORE QUESTIONS AND ANSWERS 2023 What characteristic or characteristics of CFCs make them more likely than other chlorine compounds to reach the stratosphere? Dont disolve iin water Each chlorine atom in the stratosphere can destroy how many ozone molecules? 100,000 ozone molecules Which refrigerant contains a CFC? R500, R12, R113 or R11? Theyre all CFC's HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain? Hydrogen, chlorine, flourine and carbon Which ...

NATE Light Commercial Exam Questions with Correct Answers Graded A+ Which of the following measurements would be needed to determine oil furnace combustion efficiency? a. net stack temperature and CO2 concentration b. net stack temperature and CO concentration c. stack temperature and indoor temperature d. stack temperature and fuel pressure -Ans a. net stack temperature and CO2 concentration When combustion is being tested on an oil furnace, high level of smoke and can be corrected ...

the state of the refrigerant entering the metering device is? - Answer- A subcooled high pressure liquid. what type of refrigerant is used in VERY high-pressure appliances? - Answer- R-503 what type of refrigerant is used in MEDIUM pressure appliances? - Answer- R-500 what type of refrigerant is used in HIGH pressure appliances? - Answer- R-410A and R-22 what device is located at the END of the liquid line? - Answer- The expansion device. what type of refrigerants are the LEAST ha...

GCAP Book Exam Questions With 100% Correct Answers 2024 1% concentration of ammonia is equal to what in parts per million - answer10,000 ppm 1/2 % of ammonia is it deadly concentration - answerTrue (5,000)ppm Ammonia is what on the pH scale - answer11.6 More than 100 pounds release of NH3 in 24 hours is a reportable for release . - answerTrue There are four primary types of injury with exposure to liquid ammonia. Please list all 4 - answerDehydration burn ,chemical burn ,thermal burn ,res...

True or False. Chlorine was found to do damage to the ozone layer? - Answer- True True or False. Different refrigerant are ok to be mixed together. Pressure characteristics are a little bit different but should not matter. - Answer- False. High pressure characteristics between R12 and R134a vary considerably. Will result in high head pressure and high system. A vehicle has poor air conditioning performance. The customer has added R134a refrigerant to the system. Technician A says to use a ...

EPA 608 Type I - Questions and Answers Which of the following is not a Type I appliance? a) An MVAC-like system that holds three pounds of R-12 b) A water cooler that holds 13 ounces of R-12 c) A food freezer that holds 22 ounces of R-22 d) A dehumidifier with 7 ounces of R-500 When transporting refrigerants, DOT (Department of Transportation) Regulation number 49 CFR requires _________ to be recorded on the shipping papers for hazard class 2.2, Nonflammable Compressed Gases. a) volume of each ...

1. The efficiency of the refrigerant cycle is affected by the operation of the condenser. of the following, a more efficient centrifugal compressor operation results from Answer: Lowering the condensing pressure 2. The heat removed from the refrigerant in a condenser is Answer: Sensible and Latent Heat 3. The refrigerant unit that you have been assigned to is being taken out of service for a major repair. You have been assigned to withdraw refrigerant for storage in suitable containers. Accord...