Refrigerant - Study guides, Class notes & Summaries

Refrigerant 410A Certification Questions and Answers Already Passed A full nitrogen cylinder has a pressure approx: 2500 psig A leak detector capable of sensing _____ is needed when working with R-410a. HFC A system using r-410a refrigerant has bubbles in the sight glass. Technician A says that the system must be low on refrigerant. Technician B says that the bubbles could be caused by the blended refrigerant flashing in the increasing volume of the sight glass. Who is correct? Te...

What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? - Correct answer-November 14, 1994 Section 608 of the Federal Clean Air Act requires technicians to what? - Correct answer-Recover all refrigerants. The objective of the Clean Air Act is to protect what? - Correct answer-The earth's stratosphere. HFC's - Correct answer-HydroFlouroCarbon's CFC's - Correct answer-ChloroFluoroCarbon's ODP - Correct answer-Ozone Depletion Potential Which in...

FDNY Z51 RMO Questions and Answers 100%Verified Graded A+ already passed!! 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 - correct answer lowering the condenser pressure In most semi hermetic compressors, the suction vapor is used for - correct answer cools the motor The amount of refrigerant that flows through the orifices of an economizer is determined by the - corre...

EPA 608 Universal Exam ( ACTUAL EXAM ) Questions With Verified Solutions| ALREADY PASSED. Refrigeration technicians who violate the Clean Air Act can: - - ANSWER Lose their EPA certification, be fined, be required to appear in Federal court. After 1995, any supplies of CFC refrigerants to service existing units in the USA can only come from: - - ANSWER recovery and recycling. Refrigerant that is recovered can be returned to: - - ANSWER the same system or other systems owned by the same...

Z-51 REFRIGERATION TEST With Correct Solutions 2024 Update Efficiency of the refrigerant cycle is affected by the operations of the condenser. Of the following, a more efficient centrifugal compressor operation results from: - Answer -Lowering the condensing pressure The heat removed from the refrigerant in a condenser is: - Answer -Sensible and latent heat The refrigerant unit that you have been assigned to is being taken out of service for a major repair. You have been assigned to withdr...

1. Before charging a new system with refrigerant, what should be done Answer:?: Pres- surize with nitrogen (classified as an inert gas) and leak 2. Which refrigerant can be used for leak detection as a trace gas and pres- surized with nitrogen Answer:?: R-22 3. What tools can you use to find general area of leaks and pinpoint leaks? a. Soap bubbles. b. Look for oil residue c. Electronic or ultrasonic leak detector will provide the general area of the leak d. Refrigerant dye Answer...

On low pressure chillers, moisture typically enters the refrigerant system through air leaks from areas with gaskets or fittings The maximum test pressure for leak testing a low pressure centrifugal is: 10 psig Leak test and repair the chiller to reduce refrigerant loss from a pruge unit on CFC-11 chiller ... A hydrostatic tube test kit is used to: determine if a tube leaks Commercial and industrial process refrigeration systems must be repaired when the leak rate...

What makes a contract legal? - correct answer Any verbal or written agreement. Why should hacksaws and power saws not be used when cutting tubing or refrigerant lines? - correct answer The small shavings created by the teeth of the saw can enter the tubing and do damage to the components of the system. Why should tube cutters be used? - correct answer They produce a square, clean cut and leave no shavings to contaminate the system. What can be used to cut capillary tubing? - correct ans...

The recovery process on an R-12 or R-134a A/C System should continue until a stable vacuum is held by the system for: - ANSWER-2 minutes A recycled refrigerant container has been checked and found to be above the given pressure limit for the ambient temperature Technician A says that the refrigerant container should be placed in a cooler storage area before use Technician B says that the vapor in the container should be slowly vented into a refrigerant handling unit who's right - ANSWER...

EPA 608 CORE Exam Questions and Answers (2022/2023) (Verified Answers) Graded A+ 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, flouri...