Hfc - Study guides, Class notes & Summaries

MACS 609 CERTIFICATION EXAM QUESTIONS & ANSWERS CORRECT 100% The use of ultraviolet (UV) or fluorescent dyes in an HFO-1234yf system is: - answers Approved by some vehicle manufactures but not by others One effect of some refrigerant gases in the atmosphere is that they: - answers Contribute to trapping heat Which item is not mentioned in the SAE J2099 Standard of refrigerant purity? - answers Sludge When it has been determined that an A/C system has a low refrigerant charge, what s...

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...

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...

EPA SECTION 608 CORE (2021-2022 revision) A disposable cylinder should be reduced to what pressure before scrapping? a. 0 psig b. 20 psig c. 50 psig d. 80 psig A major system repair is being performed on a R-22 appliance. What CANNOT be done to recharge the appliance? a. Add R-22 after the repair is complete. b. Retrofit the unit to R-407C. c. Use recovered or recycled R-22 from the same owner. d. Top off the unit with R-410a. A refillable cylinder must not be filled above what ...

NCTI Final Exam: Progression Field Tech 2- 3 Exam| New Update 2023/ 2024|Verified Questions and Answers 1. What would be the downstream throughput if two QAM channels with a throughput of 38 Mbps were bonded?  Answer: 76 Mbps. 2. What are two features that were added in DOCSIS 3.1 to extend the viability of HFC networks into the next decade?  Answer: OFDM and LDPC. 3. Which step in the troubleshooting process requires a discussion with the customer to gather more...

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...

HFCH EXAM 4 EXAM 110 QUESTIONS AND CORRECT ANSWERS 2024 LATEST ALREADY GRADED A+ What is body dysmorphic disorder? HFCH EXAM 4 EXAM 110 QUESTIONS AND CORRECT ANSWERS 2024 LATEST ALREADY GRADED A+ What is body dysmorphic disorder?

NCTI Cable network overview Quiz with complete solutions | Latest 2023/2024 At what point in the donstream of a hybrid fiber/coax (HFC) network is the RF signal converted into light? --At the headend. What is the basic design of a tree-and-branch network architecture? --It splits trunk and feeder lines into progressively smaller segments. What is isolation? --Isolation is the amount of signal reduction that a passive device has between two output ports. Before Fiber or coax is placed in a...

NCTI ROC II BOOK II FINAL Test 1 question with correct answers rated A+ 2023 When pressure testing a drop system to check for leakage, What must be done before applying the test signal? - correct answer The technician must isolate the drop system from the hybrid fiber/coax (HFC) network by disconnecting the drop at the distribution tap. Why do some leakage detection systems utilize a leakage carrier modulated with a tagging signal? - correct answer To avoid false detection of leaks. When ...

Maintenance Tech 2-3 Conventional - NCTI In a hybrid fiber/coax HFC fiber optic node, what are common voltages produced by DC power supplies? - ANSWER-Common Voltage includes +5, +12 and +24 VDC Why do many optical nodes accept two independent power supplies? - ANSWER-For redundant Powering of the node. What is an option available on most optical nodes for connectin to the power supply? - ANSWER-Through a power cable that is connected from the power supply directly to the power port of t...