In a refrigeration system Study guides, Class notes & Summaries

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...

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

On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? - ANSWER6-7PSI or 6F What is the primary purpose of using flux when soldering copper or brass parts? - ANSWERPrevent Oxidation The water that results from a defrost cycle of an air to air heat pump(runoff) must? - ANSWERDrain off and away from the outdoor coil. Why must the runoff be drained off and away from the outdoor coil? - ANSWERExcessive ice can build up on t...

isomass recrystalization correct answers change in surface area to volume accretive recrystalization correct answers adjacent crystals combine migratory recystalization correct answers Caused by a fluctuation in storage temperature migratory crystallization steps correct answers food warms causes food on surface to dehydrate Increases vapor pressure on the surface Moisture migrates to lower pressure when temp drops water vapor joins existing ice crystals when a product reaches ...

T/F: Drip loss increases with slower rates of freezing or increased recrystallization. correct answers True T/F: During freeze drying it is critical to keep the vapor pressure and temperature above the triple point. correct answers False T/F: When designing a fruit and vegetable processing plant it is important to take into account the heat of respiration when installing an appropriately sized refrigeration system. correct answers True T/F: Cold shortening of muscle proteins limits the ...

Refrigeration technicians who violate the Clean Air Act can: - - Correct 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: - - Correct answer-recovery and recycling. Refrigerant that is recovered can be returned to: - - Correct answer-the same system or other systems owned by the same person without restriction. Refrigerant can not be called "reclaimed...

ASE AC 609 Question and answers 2023Ozone Depletion Potential - correct answers chemical rating that ranges from 0.01-1.0 and that refers to the amount of ozone depletion caused by a substance compared to CFC-11 (eg HCFC-22 depletes .034 of the ozone where CFC-11 would deplete 1.0) class 1 substance - correct answers ozone depleting chemical with an ozone depletion potential greater than .2 (eg CFCs)HCFCs - correct answers Hydrochlorofluorocarbons, eg R-22 (HCFC-22) HFCs - correct...

EPA 608 Type 1 Questions and Answers 100% Pass Recovery equipemnt used for the service or repair of small appliances must be certified by an EPA approved lab if the recovery equipment was made after November 15, 1993 Recovery devices made before 11-15-93 and are used for recovery of refrigerant from small appliances must be capable of: recovering 80% of the refrigerant whether or not the compressor is operating or achieving a 4 inch vacuum under conditions of ARI 740-1993 EPA's definition of...

EPA 608 Exam Practice Questions 1-100EPA 608 Exam Practice Questions 1-100 Ozone depletion is caused by _______ in HFC refrigerants. - Answer chlorine CFCs and HCFCs ________ making them capable capable of reaching the stratospheric ozone layer. - Answer do not dissolve in water or easily break down in the atmosphere According to the Rolanda-Molina theory, ________ are destroyed by each chlorine atom in the stratosphere. - Answer 100,000 ozone molecules The stratospheric ozone layer prote...