FT 2-3 Written Exam Questions With Well Elaborated Answers.

Lesson 1 - correct answer Lesson one - FTTX Basics Changing the infrastructure all at once would cause too many service disruptions - correct answer What is one reason why broadband cable operators install fiber-optic cable in stages instead of changing the infrastructure all at once? An FTTC is allowed a smaller number of RF amplifiers between the optical fiber and the customer premises - correct answer What is the difference between the fiber-to-the-node (FTTN) and fiber-to-the-curb (FTTC) topologies? Optical splitters - correct answer What fiber distribution component is used in a passive optical network (PON)? Distributed star - correct answer What type of star topology used in a passive optical network (PON) places the PON splitters into fiber access terminal (FAT) located deep in the network and closer to the customer premises than the centralized split? Optical line terminal (OLT) - correct answer What element of a passive optical network (PON) uses a Bragg grating filter? Optical distribution network (ODN) - correct answer What element of a passive optical network (PON) uses patch panels? RFoG can operate in parallel with GPON or EPON, which eliminates the need for any downtime during the transition - correct answer What is it about radio frequency over glass (RFoG) that made broadband cable operators envision using it to make a seamless transition from the legacy hybrid fiber/coax (HFC) architecture over to a gigabit-capable passive optical network (GPON) or Ethernet passive optical network (EPON)? Used as passive branching devices that divide an optical signal across multiple output fibers - correct answer How are optical splitters used in the forward path? Fiber-optic cable with pre-connectorized ends - correct answer What describes a fiber pigtail? Before stripping the plastic coating from the fiber - correct answer Heat shrink tubing is installed over the fusion-splice to strengthen and protect it. When should the heat shrink be installed on the fiber? Lesson 2 - correct answer Lesson two - Using Positive and Negative Numbers, Decimals, and Fractions -25 - correct answer (-25) + (42) + (-62) + (20) = ? -323 - correct answer (17) x (-19) = ? 17 - correct answer (-17) - (-34) = ? 7 - correct answer -49/-7 = ? 29 - correct answer (20) / (-4) + (-2) x (-10) - (-2) x (7) = ? 19 5/9 - correct answer 3 6/9 + 6 1/3 + 9 5/9 = ? 5 27/77 - correct answer 4/7 x 9 4/11 = ? 1 1/58 - correct answer 7 3/8 ÷ 7 1/4 = ? 0.99999 - correct answer 8.13 X 0.123 = ? 3.7669014 - correct answer 0.5349 divided by 0.1420 = ? Lesson 3 - correct answer Lesson three - Using equations and powers of numbers Transposing - correct answer Moving a quantity or term from one side of the equal sign to the other side and changing its sign is called? true Axioms - correct answer When A=C and B=C, then A=B because both are equal to C. Quantities equal to the same quantity are equal to each other. E/R - correct answer If E = I x R then I = ? 49 - correct answer The square of 7 = ? 9 - correct answer The square root of 81 = ? 4 , -5 - correct answer 0.00004 = ___?___ x 10 to the power of ___?___. 32.5 x 10 to the power of 4 - correct answer (75 x 10 to the power of 3) + (25 x 10 to the power of 4) = ? Milli - correct answer 10 to the power of -3 has a metric prefix of ___?___. 8 x 10 to the power of -2 - correct answer (480 x 10 to the power of -5) divided by (60 x 10 to the power of -3) = ? 180 x 10 to the power of -6 - correct answer (250 x 10 to the power of -6) - (7 x 10 to the power of -5) = ? 32.5 × 10^4 - correct answer (75 × 10^3) + (25 × 10^4) = ? Lesson 4 - correct answer Lesson four - Thinking skills for troubleshooting Identify the source of emotional overload. - correct answer What is a method for controlling expectations? Presuming that all members of a group have certain characteristics. - correct answer What best describes stereotyped thinking? You observe and take notes relevant to the issue. - correct answer The attribute of being "active" as a critical thinker means? deductive reasoning - correct answer The process of applying a general statement to specific facts or situations is called ? A significant change in attitude with a noticeable movement toward negative, hostile, cynical, or paranoid thoughts - correct answer It is essential to pay attention to warning signs of stress overload. Poor attitude is one of the behaviors that may indicate that you are overstressed. What are the symptoms of poor attitude behavior? 1 - Identify the Problem 2 - Analyze the situation 3 - Isolate the elements 4 - Diagnose the symptoms 5 - Resolve the problem 6 - Verify the solution - correct answer Six Step Troubleshooting Process Identifying the Problem - correct answer You are at a customer's home and you are asking a customer whether their problem is intermittent or constant. Which step are you using from the six-step troubleshooting process? Verifying the solution. - correct answer You are at a customer's home and you believe you have solved the problem. When you check to be sure the resolution did not introduce any new problems, which step are you using from the six-step troubleshooting process? Notes and recorded data are tools that can help you accurately remember events at a site that can help you determine a plan of action or evaluate the decisions you made. - correct answer Why should you take the time to take notes and accurately record data at each job location? Tell yourself "not now" and move onto a positive thought whenever negative thoughts occur. - correct answer To break the habit of a negative self-talk cycle...? More likely to improve your motivation and be a better problem solver. - correct answer By taking control of the expectations you have, you are...? Lesson 5 - correct answer Lesson Five - Troubleshooting Digital Television Service Someone with an inquisitive and relentless desire to solve and fix problems. - correct answer What's a good characteristic of a successful troubleshooter? There may be more than one contributor to a specific DTV service problem. - correct answer What must a technician be aware of when analyzing a digital TV (DTV) problem? It narrows the scope of likely problem sources. - correct answer After a digital TV (DTV) service problem has been analyzed and possible causes considered, what is accomplished by isolating the various network elements? Diagnosing symptoms - correct answer During which step of the six-step troubleshooting process for a digital TV (DTV) service problem are QAM channel measurements typically taken? Reinforces technician's confidence that the problem will be resolved by replacing the splitter. - correct answer When replacing a splitter to resolve a DTV service problem, what does confirming splitter output levels before attaching output connectors do? Prevent digital set-top box (STB) from overheating. - correct answer What DTV trouble call could have been avoided with customer education if the customer's STB is not vented properly? STB reception of authorization message data. - correct answer When troubleshooting a digital TV (DTV) authorization issue, what can be verified using the set-top box (STB) diagnostic page? STB with DOCSIS Set-top Gateway (DSG) client software and embedded DOCSIS modems. - correct answer What type of set-top box (STB) operates more like DOCSIS cable modems with return channels on the same frequencies used for cable modems? Operate the analog TV channels at higher amplitude level than the QAM channels. - correct answer Because the spectral density of a QAM channel is much higher than that of an analog TV channel, what is done to ensure equal power in all channels in a network with analog and digital modulation channels? The QAM channel quality is on the edge for reliable reception, and the source of the problem is likely in the distribution network or customer premises. - correct answer What does a STB diagnostic page of a QAM channel showing signal-to-noise ratio (SNR) near or below 30 dB indicate? Divide-and-conquer method for troubleshooting, which can begin with measurements on customer premise equipment that offer easier access for testing. - correct answer To resolve where the source of a digital video problem lies, a technician uses...?