Hfc - Study guides, Class notes & Summaries
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ASE AC 609 Question and answers 2023
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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...
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EPA 608 Universal Exam With 100% Correct Answers 2023
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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...
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NCTI Final Exam: Progression Field Tech 2- 3 Exam| New Update 2023/ 2024|Verified Questions and Answers
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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...
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EPA 608 Exam Practice Questions 1-100
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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...
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NCTI Cable network overview Quiz with complete solutions | Latest 2023/2024
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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...
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NCTI ROC II BOOK II FINAL Test 1 question with correct answers rated A+ 2023
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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 ...
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NCTI RSC II CABLE NETWORK OVERVIEW: Understanding the Feeder System | Questions and Answers with complete solution
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What is one of the differences between tree-and-branch and hybrid fiber/coax (HFC) DESIGNS? - 
Bandwidth in the downstream path. 
In the tree-and-branch design, the cable signal in the downstream path leaves the trunk at the bridge 
amplifier. There, It makes a transition to the feeder's domain, and the signal splits. What is the maximum 
number of output ports the split signal can be routed to? - Four. 
Which of the following statements accurately describes the relationship between coaxial cab...
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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 suppl
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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...
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NCTI SERVICE TECHNICIAN
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What are three principle characteristics that define an AC waveform? - Answer- The three principle characteristics that define an AC waveform are: (1) frequency; (2) wavelength; and (3) amplitude. 
 
What is one of the basic principles of resistance reflected in the familiar practices of grounding and bonding? - Answer- Grounding and bonding practices reflect the basic principle that electricity always follows the path of least resistance. 
 
What comprises the impedance of a coaxial cable or a ...
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Progression: Maintenance Tech I - II Conventional Questions and Answers 100% Pass
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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? Node splitting, the subdividing of 
serving areas into two or more smaller servin...
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