In a hfc Samenvattingen, Aantekeningen en Examens
Op zoek naar een samenvatting over In a hfc? Op deze pagina vind je 1142 samenvattingen over In a hfc.
Pagina 4 van de 1.142 resultaten
Sorteer op
![EPA 608 Certification Core Practice Test exam 2024 with 100% correct answers](/docpics/4464660/65c695a478248_4464660_121_171.jpeg)
-
EPA 608 Certification Core Practice Test exam 2024 with 100% correct answers
- Tentamen (uitwerkingen) • 27 pagina's • 2024
-
- €15,65
- + meer info
As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere?Answer - July 1, 1992. 
 
What is the ozone layer and why is it important to us on Earth?Answer - Protective shield for Earth from the sun's harmful ultraviolent (UV) rays in the stratosphere layer that extends about 6 to 30 miles above earth. 
 
The atom found in CFC and HCFC refrigerants that destroys ozone in the stratosphere is?Answer - Chlorine. 
 
What is an ozone molecule made of?Answ...
![EPA 609 Questions and Answers Already Passed](/docpics/3152705/64c58c61ab0ce_3152705_121_171.jpeg)
-
EPA 609 Questions and Answers Already Passed
- Tentamen (uitwerkingen) • 10 pagina's • 2023
-
Ook in voordeelbundel
-
- €9,48
- + meer info
EPA 609 Questions and Answers Already Passed Lifetime of CFCs is believed to range from _____ years? 2 to 100 
For determining the Ozone Depletion Potential ________ having been assigned a factor of 1? CFC-11 
Ester-based synthetic oils can be mixed with other oils? False 
Since ________, it is no longer legal for CFCs to be manufactured or imported into the United States? January 1, 1996 
Since _____, it is illegal to vent substitutes for CFC and HCFC refrigerants? November 15, 1995 
Ozone at g...
![Progression: Maintenance Tech I - II Conventional Questions and Answers 100% Pass](/docpics/3565674/651f0ff359159_3565674_121_171.jpeg)
-
Progression: Maintenance Tech I - II Conventional Questions and Answers 100% Pass
- Tentamen (uitwerkingen) • 24 pagina's • 2023
-
Ook in voordeelbundel
-
- €9,48
- + meer info
Progression: Maintenance Tech I - II Conventional Questions and Answers 100% Pass 
In the tree-and-branch architecture, how is the downstream signal from the trunk fed to the distribution branches? Within each trunk amplifier, a portion of the downstream is fed to a bridger amplifier to boost the signal before being split and routed to the distribution branches. 
What is a common solution when congestion from modem activity and traffic becomes unacceptable in a hybrid fiber/coax (HFC) network? N...
![EPA Certification Exam (2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A](/docpics/3950019/656b8911b8253_3950019_121_171.jpeg)
-
EPA Certification Exam (2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A
- Tentamen (uitwerkingen) • 20 pagina's • 2023
-
Ook in voordeelbundel
-
- €9,95
- + meer info
EPA Certification Exam (2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A 
 
Q: What is being done in the U.S. to stop damage to the stratospheric ozone layer? 
 
 
Answer: 
Phasing out the use of chlorofluorocarbons and hydrochlorofluorocarbons. 
 
 
 
Q: How should disposable cylinders of CFCs, HCFCs, and HFCs be discarded? 
 
 
Answer: 
Recover all remaining refrigerant, render the cylinders useless and recycle the metal. 
 
 
 
Q: In addition to fines and being require...
![EPA 608 EXAM PRACTICE QUESTIONS 1-100](/docpics/5419833/664fdb18cf287_5419833_121_171.jpeg)
-
EPA 608 EXAM PRACTICE QUESTIONS 1-100
- Tentamen (uitwerkingen) • 8 pagina's • 2024
-
- €11,85
- + meer info
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 protects us from _______. - Answer-ultraviolet radiation from the sun 
 
Which...
![NCTI Final Exam: Progression Field Tech 5- 6 Exam| New Update 2023/ 2024| Verified Questions and Answers Tech 5 - 6](/docpics/4417357/65bf69a5e7d39_4417357_121_171.jpeg)
-
NCTI Final Exam: Progression Field Tech 5- 6 Exam| New Update 2023/ 2024| Verified Questions and Answers Tech 5 - 6
- Tentamen (uitwerkingen) • 18 pagina's • 2024
-
Ook in voordeelbundel
-
- €11,85
- + meer info
NCTI Final Exam: Progression Field Tech 5- 6 Exam| New Update 2023/ 2024| Verified Questions and Answers 
 
 
Tech 5 - 6 
 
 
Which piece of equipment in a VoIP (voice over Internet protocol) phone system routes a call to the public switched telephone network (PSTN) when the receiving location is from outside the PacketCable managed IP network? - ANSWER Gateway 
 
 
 
What are the three sub-network interfaces managed by PacketCable? - ANSWER ...
![EPA 608 UNIVERSAL EXAM 2024-2025 WITH 400 REAL EXAM QUESTIONS AND 100% CORRECT ANSWERS (GUARANTEED A)/ EPA 608 UNIVERSAL EXAM (NEW!!)](/docpics/5093063/6628f8ff838d0_5093063_121_171.jpeg)
-
EPA 608 UNIVERSAL EXAM 2024-2025 WITH 400 REAL EXAM QUESTIONS AND 100% CORRECT ANSWERS (GUARANTEED A)/ EPA 608 UNIVERSAL EXAM (NEW!!)
- Tentamen (uitwerkingen) • 45 pagina's • 2024
-
- €23,72
- + meer info
EPA 608 UNIVERSAL EXAM WITH 400 REAL EXAM QUESTIONS AND 100% CORRECT ANSWERS (GUARANTEED A)/ EPA 608 UNIVERSAL EXAM (NEW!!) 
Equipment covered by EPA regulations include: - all air-conditioning and 
refrigeration equipment using CFC, HCFC or HFC refrigerants. 
All devices used for a refrigerant recovery must: - Meet EPA standards 
Reusable refrigerant containers that are normally under any pressure above 15 pig 
must be hydrostatically tested and date stamped every: - 5 Years 
The EPA can ...
![EPA Certification Exam (2023/ 2024 Update) Practice Questions and Verified Answers| 100% Correct| Grade A](/docpics/3949988/656b87e7978ab_3949988_121_171.jpeg)
-
EPA Certification Exam (2023/ 2024 Update) Practice Questions and Verified Answers| 100% Correct| Grade A
- Tentamen (uitwerkingen) • 38 pagina's • 2023
-
Ook in voordeelbundel
-
- €10,43
- + meer info
EPA Certification Exam (2023/ 2024 Update) Practice Questions and Verified Answers| 100% Correct| Grade A 
 
Q: What is known as de minimis releases? 
 
 
Answer: 
It is a minimum amount of refrigerant that can be released to the atmosphere when servicing equipment. 
 
 
 
Q: What does the term temperature glide refer to? 
 
 
Answer: 
the different refrigerant boiling and condensing points of a blended refrigerant 
 
 
 
Q: Service technicians who violate the Clean Air Act 
 
 
Answer: 
may be...
![NCTI Final Exam Maintance Tech 2-3 Conventional| New Update 2023/ 2024| Verified Questions and ANSWERs](/docpics/4417693/65bf77ac5d17d_4417693_121_171.jpeg)
-
NCTI Final Exam Maintance Tech 2-3 Conventional| New Update 2023/ 2024| Verified Questions and ANSWERs
- Tentamen (uitwerkingen) • 13 pagina's • 2024
-
Ook in voordeelbundel
-
- €10,90
- + meer info
NCTI Final Exam Maintance Tech 2-3 Conventional| New Update 2023/ 2024| Verified Questions and ANSWERs 
 
 
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 o...
![EPA 609 Technician Certification Questions and Answers Already Passed](/docpics/3152716/64c58d14b8da2_3152716_121_171.jpeg)
-
EPA 609 Technician Certification Questions and Answers Already Passed
- Tentamen (uitwerkingen) • 18 pagina's • 2023
-
Ook in voordeelbundel
-
- €9,48
- + meer info
EPA 609 Technician Certification Questions and Answers Already Passed 1. T/F Ozone at ground level ans at Stratosphere is a harmful pollutant FALSE 
2. For determining the Ozone Depletion Potential __________ having been assigned a factor of 1 CFC-11 
3. Ozone layer absorbs and scatters __________ form the sun Ultraviolet light 
4. T/F R-134 is a chlorine-free refrigerant TRUE 
5. a refillable refrigerant cylinder must not be filled above _________ of its full capacity 80% 
6. T/F Ester-based sy...
![Verkoop je kennis op stuvia](https://www.stuvia.com/hosted-imgs/app/stock-fotos/banner_seller_big.jpg)
Vraag jij je af waarom zoveel studenten in mooie kleren lopen, geld genoeg hebben en genieten van tonnen aan vrije tijd? Nou, ze verkopen hun samenvattingen op Stuvia! Stel je eens voor dat jouw samenvatting iedere dag weer wordt verkocht. Ontdek alles over verdienen op Stuvia