tech conventional, 270-51-6 Understanding Magnetism and Electromagnetism, 271-12-4 Using Positive and Negative Numbers, Decimals, and Fractions, 272-11-4 Understanding Electrical Circuits, 271-32-3 Using Equations And Powers Of Numbers, 272-22-5 Unde...
17
(-17) - (-34) =
-25
(-25) + (42) + (-62) + (20) =
-323
(17) x (-19) =
29
(20) / (-4) + (-2) x (-10) - (-2) x (7) =
180 x 10 to the power of -6
(250 x 10 to the power of -6) - (7 x 10 to the power of -5) =
8 x 10 to the power of -2
(480 x 10 to the power of -5) divided by (60 x 10 to the power of -3) =
32.5 x 10 to the power of 4
(75 x 10 to the power of 3) + (25 x 10 to the power of 4) =
32.5 × 10^4
(75 × 10^3) + (25 × 10^4) =
7
-49/-7 =
4, -5
0.00004 = ______ x 10 to the power of ______.
3.7669014
0.5349 divided by 0.1420 =
Milli
10 to the power of -3 has a metric prefix of ______.
20%
1:5 ratio is equal to
0.02 amperes
20 milliamperes is the same as ________. (Remember, 1 milliampere = 0.001 ampere.)
19 5/9
3 6/9 + 6 1/3 + 9 5/9 =
5 27/77
4/7 x 9 4/11 =
5 kV
5 kilovolts is the same as
1 1/58
7 3/8 divided by 7 1/4 =
0.99999
8.13 X 0.123 =
0.1 dB.
A 1 mV decrease in a signal level of 40 dBmV is approximately equivalent to a decrease in level of
120
A DC series circuit where R1 = 50 ohms, R2 = 100 ohms, R3 = 183.33 ohms, IT = 0.6 amperes, and ET = 200 volts consumes ______ watts of power.
Provides a path for the current flow from the power source to the load and from the load back to the power source.
A conductor
Dividing the numerator by the denominator and multiplying by 100.
A fraction is converted to a percent by
90%, 10%
A length of coaxial cable that has an attenuation of 10 dB will experience an input RF signal power loss of _________, with __________ of the signal remaining.
Equals 1 mV across 75 ohms.
A minimum acceptable signal level of 0 dBmV at a TV set input
A fraction.
A number that compares an amount that is less than the whole to the whole amount is
Has a cone that moves back and forth in relation to the varying current of the original sound.
A permanent-magnet loudspeaker
Has four valence electrons.
A semiconductor material
25.89%
A signal increase of 1 dB represents a __________ increase in power.
Is a simple line design used to represent a component or device in a schematic circuit diagram.
A symbol
Above 216 MHz.
Acceptable leakage limits per the FCC specify a maximum acceptable field strength of 15 µV/m (micro-volts/meter) at 30 meters for frequencies
20 µv/m, 10
According to the FCC, leaks _____ and above measured _____ feet from the cable must be logged and repaired.
R3.
Across which resistor in a DC series circuit where R1 = 25 ohms, R2 = 50 ohms, R3 = 75 ohms, and R4 = 10 ohms is the greatest voltage drop?
3.162:1, the square root of the power ratio.
An input-to-output power ratio of 10:1 has an input-to-output voltage ratio of
Across a resistor that is disconnected from the circuit voltage source.
An ohm meter should be connected
Measure the power in an optical signal.
An optical power meter (OPM) is used to
Must-carry or retransmission consent.
As part of the Cable Television Consumer Protection and Competition Act of 1992, what can an over-the-air (OTA) broadcast station choose for carriage on a cable operator's network in the same market?
More likely to improve your motivation and be a better problem solver.
By taking control of the expectations you have, you are
Part of a troubleshooter's job is to favorably influence the customer's opinion of the cable company.
Communication soft skills and customer satisfaction are linked because
893 x 10^-3 V = 893 mV.
Convert 0.893 volts into a power of 10 and metric prefix form.
Flow that is excessive for a specific size of conductor can cause the conductor to become too hot and melt or burn the conductor's insulating cover.
Current
Electromagnetic signal interference produced by power-line transients, motor arcing, household appliances, or electrical systems without shielded wiring.
Digital artifacts can be caused by impulse noise. What is impulse noise?
Flow is continuous electron flow in the same direction.
Direct current
Standing with legs slightly apart and feet in the direction of the other person.
During a conversation with a customer, which of the following can be interpreted as a neutral, open position?
Analyze the situation.
During the six-step troubleshooting process, you need to ask the customer questions such as, "Have any other contractors worked at the premises lately?" What step in the process do such questions most closely resemble?
30.
ER2 = _______ volts in a DC series circuit where R1 = 150 ohms, R2 = 150 ohms, R3 = 550 ohms, IT = 0.2 amperes.
The transfer of energy from valence electron to valence electron as a result of applied charges.
Electric current is actually produced by
Have very few valence electrons.
Elements that are called conductors
Is often the result of the failure of a small part within a larger circuit
Excessive current flow
Always curve around through the body of the magnet to form complete loops.
Flux lines
Install series 6 cable instead of series 59 cable because series 6 cable is larger diameter, with lower resistance, than series 59 cable.
How can an installer control the resistance of the drop cable being installed to the customer premises?
2.1 kWh.
How many kilowatt-hours (kWh) would be consumed by a standby power supply that provides 60 volts and 10 amperes of current for a period of 3 1/2 hours.
0.2 A.
How much current would an applied voltage of 60 volts cause in a circuit of 300 ohms of resistance?
11.5 dBmV.
How much signal is necessary from the subscriber's tap port @ 750 MHz to provide a minimum of 3.0 dBmV to the TV set when the drop is 150 feet of Series 6 cable and just one outlet (use 5.65 dB per 100 feet for the attenuation rate and round off to nearest tenth of a dBmV)?
14.5 dBmV.
How much signal is needed from the subscriber's tap port @ 750 MHz to provide a minimum of +3.0 dBmV to each of the TV sets when there is 132 feet of Series 6 cable and a two-way splitter? (Use 5.65 dB per 100 feet for the Series 6 cable attenuation rate and 4.0 dB for the splitter attenuation.)
0.5
IT = _______ amps in a DC series circuit where R1 = 10 ohms, R2 = 20 ohms, R3 = 30 ohms, R4 = 40 ohms, and ET = 50 V.
Near field probe.
If a leak is at an amplifier location, which antenna would be best for more precise determination of the exact source?
The output cable of the first directional coupler's output port was disconnected.
If there is no signal on the input cable to the second directional coupler in a loop through drop system, what is the likely cause?
The same amount of current flows through each component.
In a DC series circuit,
Where only some of the magnetic domains are pointing in the same direction, the magnetic field is weaker.
In a magnetic material,
Begin your isolation at the ground block.
In analyzing faults at the customer's location, you will need to determine if the problem is localized or encompasses a larger area of the cable system. If the problem is affecting the whole house, how should you proceed?
Divide an optical signal across a number of output fibers.
In the forward direction, optical splitters are passive branching devices that
Will depend on the type of problem, the customer, and numerous other factors.
In troubleshooting, hard skills can be utilized the same way each time, whereas soft skills
A significant change in attitude with a noticeable movement toward negative, hostile, cynical, or paranoid thoughts
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?
Is considered to be the total resistance when the source and wire resistances are very small.
Load resistance
It is used as the main cable between the headend and node.
Loose-tube fiber-optic cable is used for what purpose?
Alike, repel
Magnetic poles that are ___________ will ____________ each other when those poles are near each other.
Was discovered when the Greeks noticed that magnetite always aligned itself in a north and south direction.
Magnetism
87 k
Main Menu 3of12 Main ContentA DC series circuit with R1 = 15 kilo-ohms, R2 = 25 kilo-ohms, and R3 = 47 kilo-ohms has a total resistance of ________ ohms.
The customer's pupils are dilated.
Main Menu6of12 Main ContentWhich of the following non-verbal signs might indicate that the customer is happy with what you are saying?
When the circuit operates properly and no damage occurs to the circuit components.
Normal current flow results
Describe the nature of the problem and what you did to correct it.
Once you have restored the operations of the customer's service, how should you communicate this to the customer?
The 10th root of the 1 bel ratio.
One-tenth bel or 1 dB is
Tighter networks, which allow a smaller amount of signals to leave the network and less interfering signals into the network.
Other than proving compliance with Federal Communications Commission (FCC) requirements, what are some other benefits of regular signal leakage monitoring and repair?
61
R2 = ________ ohms in a DC series circuit where R1 = 33 ohms, R3 = 47 ohms, R4 = 56 ohms, and RT = 197 ohms.
Doubles when the length of a conductor doubles.
Resistance
E/R
Simplify and solve the equation: If E = IR then I = ?
CB or ham radio interference and ingress on all cable channels.
Some set-top boxes with poor shielding can cause which of the following problems?
The cable operator must make their Equal Employment Opportunity (EEO) procedures available for public inspection on their websites.
The Cable Communications Policy Act of 1984 mandates that cable operators must hold outreach programs such as job fairs, internships, mentoring, and interaction with schools and community groups. What other employment practices are mandated by this Act?
Indicates how many coulombs pass a given point during 1 second.
The ampere
You observe and take notes relevant to the issue.
The attribute of being "active" as a critical thinker means
3
The circuit current is ______ amps in a DC series circuit where R = 40 ohms and E = 120 V.
700 MHz LTE.
The deployment of ______________ for use as a public safety communications technology will greatly increase the importance of controlling and reducing leakage and ingress issues.
100:1
The input-to-output power ratio for 2 bels of similar impedance cable is
1.2589:1
The input-to-output power ratio of a coaxial cable that has 1 dB of attenuation is
A variable attenuator.
The leakage detector's calibration can be verified using the system's leakage carrier, a signal level meter, and
If you wrap the fingers of your left hand around the wire with your thumb pointing in the direction of the current flow, your fingers will be wrapped in the direction of the magnetic field.
The left-hand rule for electromagnetism in a wire states that
You are empathetic and want to help the customer achieve a better experience.
The letter S in the acronym RESPECT (for showing respect to customers) stands for sincere and means
I and A
The letter and symbol designation for current is ______ and ______, respectively.
Is the part of the electrical circuit that uses the electrical energy provided by the power source to carry out some desired function.
The load
Created by a straight piece of wire is weaker than that created by forming loops of wire.
The magnetic field
The number of electrons in the valence shell.
The major factor for determining whether a particular element is a conductor, a semiconductor, or an insulator is
The customer.
The majority of ingress is caused by which of the following?
Silver.
The metal that has the greatest conductance is
Third
The orbital shell that has a maximum electron capacity of 18 electrons is the ___________ shell.
1.585:1
The power ratio for 2 dB is
Is the part of an electrical circuit that provides a difference of potential.
The power source
Electromagnet.
The recording head of a tape recorder is actually a(an)
The cross-sectional area of a conductor decreases.
The resistance of a conductor increases as
49
The square of 7 =
9
The square root of 81 =
Determined by the magnitude of the magnetomotive force (mmf).
The strength of an electromagnetic field is
Telephone.
The term "bel" originated with the early days of
The measurement of the difference in potential between two charges.
The term voltage normally refers to
2.479
The total DC loop resistance of a 1,850 foot piece of 0.500-inch coaxial cable with a DC loop resistance of 1.34 ohms per 1,000 feet is ________ ohms.
They all have the same amount of current flowing through them.
Through which resistor in a DC series circuit where R1 = 10 ohms, R2 = 15 ohms, R3 = 20 ohms, and R4 = 5 ohms is the greatest current flowing?
Tell yourself "not now" and move onto a positive thought whenever negative thoughts occur.
To break the habit of a negative self-talk cycle
Wrap a coil of insulated wire around an iron bar and pass an electric current through the wire.
To create an electromagnet,
The difference between the splitter's input level and the measured output level of that port.
To determine actual insertion loss on a 2-way splitter, the input level at a particular frequency and the output port levels at that same frequency are measured. What is the actual insertion loss of the output port?
It sounds like you are making an accusation.
Using a phrase such as "You didn't..." when speaking with a customer should be avoided because
They are based on the logarithms of power ratios.
Values expressed in dBmV progress in a nonlinear fashion when compared to a linear mV scale because
Values of voltage less than 1 millivolt (mV) across 75 ohms.
Values expressed in dBmV that are preceded by a minus sign (-) represent
A measurement of the force or pressure that causes electrons to move.
Voltage is
Quarterly monitoring and annual reporting.
What are the FCC requirements regarding leakage monitoring?
A power source, a load, and the connecting conductors.
What are the three basic elements of an electrical circuit?
Millivolt (mV), decibel millivolt (dBmV), and microwatt (μW) or nanowatt (nW).
What are the units that can be used to represent signal level values?
It can result in high installation and operational costs for the network.
What can active signal amplification result in?
Relaxation of tight regulations due to local broadcaster concern over competition from cable operators importing distant TV stations from other markets.
What coincided with the introduction of satellite program distribution, which enabled the delivery of cable specific networks and created demand for cable TV services in metropolitan areas?
How the cable operator runs their business and their network.
What does the filing of forms and reports in a cable operator's public file reflect?
They are exempt from performing POP testing, but if requested by the FCC, they must be able to prove compliance with the minimum technical criteria.
What exemption for proof-of-performance (POP) testing does the Federal Communications Commission (FCC) allow cable networks having less than 1,000 customers?
Signals leaking into the cable system.
What is ingress?
A loop-through system has a splitter or directional coupler at each outlet that provides signal to those outlets and passes the remaining signal to the next outlet, while a home-run system has a dedicated cable run to each outlet from a common splitter.
What is the design difference between a loop-through system and a home-run system?
State-issued franchises are typically much easier to renew and manage because there is one main authority (instead of many local franchise authorities).
What is the justification for state-issued franchises in place of local franchises?
29 dB.
What is the maximum tap value that can be installed when the tap is connected directly to a line extender amplifier output and: (1) the line extender output is 45 dBmV @ 745.25 MHz; (2) the longest amount of Series 6 coaxial cable from the tap to either of the two TV sets is 150 feet; (3) the Series 6 coaxial cable attenuation rate is 5.65 dB/100 feet @ 750 MHz; (4) the drop includes a splitter with a 4.0 dB loss; and (5) the system minimum signal level required at each of the two TV sets is 3.0 dBmV?
Inspect the splitter and confirm that all of the splitter's F-connectors are properly wrench-tightened by using a 7/16-inch torque wrench.
What is the process for checking for ingress at a drop splitter at the customer premises?
There is little or no relationship between VHF and UHF leakage and ingress.
What is the relationship between VHF and UHF leakage and ingress?
To provide the permissions necessary to allow a cable operator to use the public right-of-way within the franchise area, in order to access and connect customer premises.
What is the role of a franchise authority?
The theoretical output level @ 197 MHz is 5.5 dBmV and the actual output port insertion loss is 5 dB.
What is the theoretical output level and the actual output port insertion loss of a two-way splitter when: (1) the measured input level to the splitter is 9 dBmV @ 197 MHz; (2) the manufacturer-specified insertion loss is 3.5 dB @ 403 MHz; and (3) the measured output port level is 4 dBmV @ 197 MHz?
19.614 ohms.
What is the total DC loop resistance of a 350-foot piece of Series 59 drop cable when the DC loop resistance of that Series 59 cable is 56.04 ohms per 1,000 feet?
122 V.
What is the total voltage of a DC series circuit where ER1 = 20V, ER2 = 45V, and ER3 = 57V?
37.75 uV/m.
What is the uV/m level of a -37 dBmV signal leakage measurement at 127.2625 MHz?
80 V.
What is the voltage in a circuit with 0.8 ampere of current and 100 ohms of resistance?
Deductive.
What kind of reasoning is described as applying a general statement that you know to be true to a new situation?
The attraction between the positive nucleus and the negative electron.
What prevents the electrons that orbit an atom's nucleus at high speeds from breaking away from the nucleus due to centrifugal force?
Remove and replace the splitter.
What should be done to correct signal leakage from a drop splitter with a defective cover plate?
Information carried on signals in the aeronautical bandwidths.
What signal leakage information and measurements must be included with the annual reporting to the FCC?
The UTP/STP test set.
What test equipment automatically identifies specific wiring problems on 4-pair UTP/STP patch cords and station wiring?
The time domain reflectometer (TDR).
What test equipment measures cable lengths and locates faults on both twisted pair and coaxial cable?
Variable attenuator.
What type of fiber-optic attenuator is used to check out and optimize network performance by adding loss, typically from 0 to 65 dB, in either stepped or continuous movements?
Macrobending.
What type of loss occurs in a transmission line when the fiber-optic bend radius decreases?
1997.
What year did the current Emergency Alert System (EAS) replace the Emergency Broadcast System (EBS)?
75 Ω plus the correct DC loop resistance.
When checking for continuity of coaxial cable used in the broadband industry using the DC loop resistance, which of the following readings on the digital multimeter (DMM) indicates the cable is good?
Only if necessary as a last corrective measure.
When checking for ingress at the tap, when would you replace the drop cable between the ground block and the customer's tap?
Where the cord meets the plug.
When examining a power cord for damage, what part of the cord is the most vulnerable?
The less chance of passing radio frequency (RF) interference from one TV set to the other.
When measuring inadequate port-to-port isolation in a drop splitter, the higher the amount of isolation between the splitter output ports,
Its resistance decreases to half its original value.
When the cross-sectional area of a conductor doubles,
The signal is 3 dB lower than normal from that point on.
When the output of a line extender is 3 dB lower than it normally should be,
It affects all TV sets.
When troubleshooting a drop splitter with defective port connections, which of the following is true about a bad connection at the splitter's input port?
Only the TV set incorrectly connected to the splitter input port will have a good picture, while all the TV sets connected to the other output ports will have black pictures.
When troubleshooting a drop splitter with wrong cable connections, incorrectly connecting the input cable to a splitter's output port and the TV cable to the input port of the splitter will usually result in which of the following?.
2.7 dB.
When using an optical coupler, a desired split ratio of 40/60 will result in an insertion loss of
Light intersects with a material (like air), causing it to bend differently than if it was traveling within the fiber.
When using the optical time domain reflectometer (OTDR) to troubleshoot fiber-optic cable, locating a reflective event means
The input cable usually comes from the outside wall, the tap port cable typically goes down the wall, and the output port cable typically continues on through the attic to another section of the house.
When visually identifying correct cable connections for a directional coupler in an attic with a loop-through system, which cable usually comes from the outside wall, which cable typically goes down the wall to the TV, and which cable typically continues on through the attic to another section of the house?
2012.
When were additional rules enacted by the Federal Communications Commission (FCC) that required closed captioning of much of the programming delivered via Internet protocol (IP)?
Category 6 (CAT-6).
Which category of wiring reduces both Near-End Crosstalk (NEXT) and attenuation due to a larger-gauge conductor?
BNC (Bayonet Neill-Concelman) connector.
Which coaxial connector provides better isolation between the center conductor and the coaxial shield?
Red/green, yellow/black.
Which colors are used on a telephone station jack?
A return path (reverse or upstream) amplifier.
Which is the best amplifier to use when the digital set top box, cable modem, or embedded multimedia terminal adapter (EMTA) is unable to consistently and reliably transmit information back to the headend because of a long cable drop run?
When A = C and B = C, then A = B because both are equal to C, which supports the axiom: Quantities equal to the same quantity are equal to each other.
Which of the following are statements of true axioms?
108-137 and 225-400 mHz.
Which of the following are the aeronautical frequency bands?
GPS-assisted leakage measurement instruments.
Which of the following automatically captures the location of leakage data right down to the street address?
Presuming that all members of a group have certain characteristics.
Which of the following best describes stereotyped thinking?
Damage to the connector or mating surface.
Which of the following can be a consequence of over-tightened connectors?
ST connectors.
Which of the following connectors uses a bayonet coupling mechanism?
Using the sweep function to check for the presence of reflections called composite carrier to noise (CCN).
Which of the following describes the process for troubleshooting signals?
(Cable length in feet/100) x Cable attenuation in decibels (per 100 feet) at frequency (f).
Which of the following formulas is used to calculate normal attenuation of a certain length of coaxial drop cable?
Makes eye contact with the customer.
Which of the following is a characteristic of a good listener?
A block diagram is a simplified outline of an electrical system that shows circuits or parts as rectangles and other shapes.
Which of the following is a correct definition for a type of circuit graphic?
It can be used in sweep mode to identify instances of ingress.
Which of the following is a feature of the signal level meter (SLM)?
Identify the source of emotional overload.
Which of the following is a method for controlling expectations?
Wearing shoes with oil-resistant and non-marking soles.
Which of the following is a respectful way to treat a customer's property?
Pull back the braid so it covers the outside jacket, making sure that no braid or foil is touching the center conductor.
Which of the following is an industry standard step to take when preparing cable for use with an F-connector?
Strong over-the-air television channels.
Which of the following is one of the common sources of over-the-air ingress?
Talk to the customer using nontechnical terms.
Which of the following is the best way to speak with a customer?
700 MHz Long Term Evolution (LTE).
Which of the following is the frequency allocation dedicated specifically to public safety communications?
They are used to connect data jacks to service provider cabling.
Which of the following is true about 110-type punch-down blocks?
It is faster and more reliable than installing connectors in the field.
Which of the following is true of fiber-optic pigtail splicing?
The input ampere rating is the maximum load the supply will draw on the 110V AC circuit.
Which of the following is true when connecting a device to the correct AC to DC power supply?
The resistance of a material with a negative temperature coefficient will decrease as the temperature increases.
Which of the following is true?
The total resistance (RT) of a DC series circuit is the sum of the individual resistances in the circuit (RS + RW + RL).
Which of the following is true?
RJ45.
Which of the following refers to an eight-pin, eight-conductor plug and jack capable of supporting Ethernet and telephone?
Stranded 2-wire.
Which of the following wiring is used to connect a speaker to an audio source?
The Telecommunications Industry Association/Electronics Industries Alliance (TIA/EIA) 568 B standard.
Which wiring standard is used in all modern Ethernet data cables, jacks, and connectors?
A leakage detector has an increased sensitivity to weak signals.
Why is a leakage detector preferable to a signal meter for detecting leakage?
A clear tone of voice can influence the customer's image of you and the company you represent.
Why is it important to maintain a clear tone of voice?
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.
Why should you take the time to take notes and accurately record data at each job location?
Identifying the problem.
You are at a customer's home and you are asking the customer whether the problem is intermittent or constant. Which step are you using from the six-step troubleshooting process?
Verifying the solution.
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?
2.1
______ kilowatt-hours (kWh) would be supplied by a standby power supply that provides 60 volts and 10 amperes of current for a period of 3 1/2 hours.
24
______ watts of power are consumed in a circuit with an applied voltage of 60 volts and a load of 150 ohms.
23.076
_______ ohms of resistance is required for a circuit with an applied voltage of 30 volts and a circuit current of 1.3 amperes.
