In a refrigeration system Study guides, Class notes & Summaries

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 ...

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...

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 ...

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 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...

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...

NATE CORE STUDY GUIDE(correct answers)to passWhich of the following is not the product of incomplete combustion: Oxides of nitrogen An oil trap is required at the base of the discharge line of the vertical riser is _____ or above 8 feet A diode allows current to flow in one direction: True 1 Watt = _____ Btu 3.41 Current in a closed circuit is limited by which of the following: resistance An oil separator is located in the _____: Discharge line ___...

WHMIS question and answers rated A+ already passed 2023 What is WHMIS? - correct answer Workplace Hazardous Materials Information System -Provides information about hazardous materials that may be used within the workplace. After a product has been classified, WHMIS provides communication of health and safety information with: - correct answer -WHMIS Symbols -WHMIS Labels -Material Safety Data Sheets (MSDS) Class A: Compressed Gas - correct answer This class includes compressed gases...

Oct/Nov 2021 TAX2601 Principles of Taxation 100 Marks Duration 2 Hours (plus 60 minutes for upload) This paper consists of nine (9) pages plus the annexure (p i). IMPORTANT INSTRUCTIONS: 1. All amounts exclude VAT unless stated otherwise. 2. All persons mentioned are residents of the Republic of South Africa unless stated otherwise. 3. SARS = South African Revenue Service The answering of this paper: 1. This paper consists of four (4) questions. 2. Answer all the questi...