Components Of Input Current Quiz

53 Questions | Total Attempts: 83

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Components Of Input Current Quiz

In this quiz you will get to learn about components of input current. Play this quiz and test your knowledge of amplifiers devices.


Questions and Answers
  • 1. 
    One cycle
    • A. 

      A) Per second is the same as one kilohertz

    • B. 

      B) Is equal to one complete rotation of the armature of an AC generator.

    • C. 

      C) Is one-half of a sine wave

    • D. 

      D) Is two positive alternations of any AC .waveform

    • E. 

      E) Per second is the same as 360 hertz

  • 2. 
    Which tool do you use to measure the input current on the input wiring?
    • A. 

      A) An ohmmeter.

    • B. 

      B) A clamp-on ammeter.

    • C. 

      C) A digital multimeter (DMM).

    • D. 

      D) A true RMS DMM.

  • 3. 
    Alternating current is a current
    • A. 

      A) That varies in magnitude but never changes direction.

    • B. 

      B) That changes direction but never varies in magnitude.

    • C. 

      C) That never chages direction or magnitude

    • D. 

      D) That changes direction (or alternates) in the conductor each time the potential difference applied to the ends of the conductor changes (or alternates) its polarity.

    • E. 

      E) In a circuit with a potential difference that never changes polarity.

  • 4. 
    Three components of the tap housing (and not the tap faceplate) are
    • A. 

      A) The threaded mounting tap, seizure screw mechanisms, and right-angled input and output ports.

    • B. 

      B) Tap ports, electronic circuit board, and radio frequency interference (RFI) gasket.

    • C. 

      C) Output ports, input ports, and tap ports.

    • D. 

      D) Strip gauge, cover bolts, and splitter network.

    • E. 

      E) Plastic component cover, input port male or female interconnect pins, and low-pass coil.

  • 5. 
    Passive optical network (PON) is another name for which of the following terms?  
    • A. 

      A) Fiber-to-the-node (FTTN).

    • B. 

      B) Fiber-to-the-home (FTTH).

    • C. 

      C) Fiber-to-the-curb (FTTC).

  • 6. 
    A distribution amplifier requires an external AC voltage source. Which is the first component to receive the AC power
    • A. 

      A) The seizure screw mechanism.

    • B. 

      B) The Fast Transfer Electronic Crowbar (FTEC).

    • C. 

      C) The plug-in jumper.

  • 7. 
    What is a leakage tagger used for?
    • A. 

      A) Identify an individual leak from all other leaks.

    • B. 

      B) Assure a leak is coming from the cable system being tested.

    • C. 

      C) Prioritize leaks.

    • D. 

      D) Tag a leak so it is easier to find the next time.

  • 8. 
    The impedance of coaxial cable or a device is made up of the combined effects of which three electrical properties?
    • A. 

      A) Capacitance, voltage, and inductance.

    • B. 

      B) Resistance, inductance, and capacitance.

    • C. 

      C) Inductance, resistance, and voltage.

    • D. 

      D) Resistance, current, and capacitance.

  • 9. 
    You are doing an aerial installation of fiber-optic cable. When you survey the installation path, you see that the path runs near several short outbuildings and over a series of hedges. Which installation method should you use?  
    • A. 

      A) The drive-off method

    • B. 

      B) The pull-in method.

    • C. 

      C) The figure-eight tension method.

  • 10. 
    Induction
    • A. 

      A) Is the sum of all the random magnetic fields associated with a conductor's free electrons.

    • B. 

      B) Occurs in a conductor only when the current of an applied voltage is constant, or zero.

    • C. 

      C) Is also known as electromagnetic field (emf).

    • D. 

      D) Is the production of an emf in a conductor by changes in the magnetic field around the conductor.

    • E. 

      E) In a conductor occurs when there is no magnetic field surrounding it.

  • 11. 
    Modulation error ratio (MER) is an indicator of digital modulation signal quality. For error-free reception and adequate margin, what should be the minimum MER reading for a 256-QAM (quadrature amplitude modulation) signal?.
    • A. 

      A) ≥ 32 dB.

    • B. 

      B) ≥ 26 dB.C) ≥ 36 dB.

    • C. 

      D) ≤ 28 dB.

  • 12. 
    Which of the following is the distance occupied by one hertz?
    • A. 

      A) Frequency.

    • B. 

      B) Amplitude.

    • C. 

      C) Phase.

    • D. 

      D) Wavelength.

  • 13. 
    A directional coupler
    • A. 

      A) Divides the trunk or feeder cable signal into two equal voltage and power output signals.

    • B. 

      B) Should be installed on a trunk or subtrunk cable either immediately at the output of the trunk amplifier, or at least three spans away, to minimize undesired reflections.

    • C. 

      C) Passes the desired frequencies, combines the RF signals and AC voltages, and directs RF/AC signals to certain ports with minimum efficiency.

    • D. 

      D) Has different housings and radio frequency interference(RFI) and environmental gaskets than a splitter.

    • E. 

      E) Can pass AC voltage to the input port only.

  • 14. 
    A customer is having trouble accessing a particular Web site. What performance utility should the technician run to identify the router-to-router network hops that a data packet travels across, en route from the modem analyzer to the Web site's server?
    • A. 

      A) Ipconfig.

    • B. 

      B) Trace route.

    • C. 

      C) Throughput.

    • D. 

      D) Ping.

  • 15. 
    When a capacitor is fully charged,
    • A. 

      A) The capacitor allows the flow of current in a capacitive DC circuit.

    • B. 

      B) The applied voltage is zero and the capacitor voltage is zero, in a capacitive AC circuit

    • C. 

      C) The source voltage reaches its minimum value.

    • D. 

      D) Both the applied voltage and the charging current stop changing values for an indefinite but significant period of time, in a capacitive AC circuit.

    • E. 

      E) The source current then reverses directions and flows back through the source, in a capacitive AC circuit.

  • 16. 
    What is the value of the current when: (1) the effective voltage is 120 volts; (2) the resistance of the source is 3 ohms; (3) the resistance of the conductors is 2 ohms; and (4) the resistance of the load is 5 ohms?
    • A. 

      A) 0.83 amperes.

    • B. 

      B) 12.00 amperes

    • C. 

      C) 10.00 amperes.

    • D. 

      D) 1.20 amperes.

    • E. 

      E) 22.00 amperes.

  • 17. 
    A directional tap that feeds signal through to other taps
    • A. 

      A) Has a specified tap port insertion loss but the output insertion loss is not specified

    • B. 

      B) Has a directional coupler portion that efficiently routes most of the signal to the output port while removing a small amount of the signal and passing it to the splitter network.

    • C. 

      C) Has a circuit board with a low-pass coil that blocks the 60 Hz AC voltage directly between the input port and the output port, while passing the higher frequency RF signals.

    • D. 

      D) Does not have an output port interconnect pin because it does not pass any signals to the output port.

    • E. 

      E) RF signal level at the output port is determined by the tap's isolation.

  • 18. 
    Which of the following statements is true?
    • A. 

      B) Minimize the cable length between the power supply and the power inserter to maximize AC voltage loss.

    • B. 

      C) Power inserters remove a small portion of the main RF trunk signal and supply it to the subtrunk cable, or from one feeder cable to another cable.

    • C. 

      D) A power inserter's internal circuitry passes forward RF signals on one RF/AC port and reverse RF signals on the other port while combining 24 DCV onto one or both of its RF/AC ports.

    • D. 

      E) For each power inserter, the system design must ensure that: (1) the current required by any one RF/AC port does not exceed that port's power-passing specification; and (2) the current required by both RF/AC ports does not exceed the AC input port power-passing specification.

  • 19. 
    The unique quality of test points is one of the many factors which distinguish line extenders. If it is important for test signals to be sent in both directions from the test points, which type of test points should the line extender have
    • A. 

      A) Resistive type.

    • B. 

      B) High-gain type.

    • C. 

      C) Directional coupler type.

  • 20. 
    Which of the following generally has the highest fixed capacitance values?
    • A. 

      A) Electrolytic capacitors.

    • B. 

      B) Oil-filled capacitors.

    • C. 

      C) Trimmer capacitors.

    • D. 

      D) Paper capacitors.

    • E. 

      E) Padder capacitors.

  • 21. 
    Which of the following statements is true about hardline RF splitters?
    • A. 

      A) Three-way splitters have one input port and two output ports.

    • B. 

      B) Two-way splitters can be set up to direct 60/90 VAC to either or both output ports for powering trunk/bridger, minibridger, distribution, system, or line extender amplifiers.

    • C. 

      C) All hardline RF splitters have "keyed"faceplates to ensure correct installation.

    • D. 

      D) Jumper wires should never be replaced with fuses for distributing AC voltage.

    • E. 

      E) Power loss in a three-way balanced splitter is less than a two-way splitter.

  • 22. 
    Ground-based cumulative leakage index (CLI) and flyover signal leakage measurements
    • A. 

      A) If recorded digitally, must show that the 75th percentile level of points recorded over a cable system do not exceed 20 uV/m root mean square (RMS).

    • B. 

      B) Both require the use of a handheld dipole antenna.

    • C. 

      C) Utilize different types of receivers and antennas, but both methods test signals operating in the VHF aeronautical band (108-137 MHz).

    • D. 

      D) Both require measurements be taken in the 225-400 MHz frequency band.

  • 23. 
    After a foam dielectric cable is properly cored and stripped, the cable's center conductor should be
    • A. 

      After a foam dielectric cable is properly cored and stripped, the cable's center conductor should be A) Prepared with a rounded tip.

    • B. 

      B) Lubricated to prevent it from getting hung up when installing the connector.

    • C. 

      C) Coated with an adhesive to hold the connector in place.

    • D. 

      D) Filed to remove any sharp edges or burrs.

    • E. 

      E) Prepared with a pyramid-shaped cut to the tip.

  • 24. 
    Many factors influence signal attenuation. What is the effect of temperature on cable signal attenuation?
    • A. 

      A) The higher the temperature, the lesser the cable signal attenuation

    • B. 

      B) Temperature has no affect on cable signal attenuation.

    • C. 

      C) The higher the temperature, the greater the cable signal attenuation.

  • 25. 
    When the primary-to-secondary turns ratio in a transformer
    • A. 

      A) Is 1:2 or 1/2, the secondary coil voltage is one half the primary coil voltage.

    • B. 

      B) Is 2:1 or 2/1, the secondary coil voltage is twice the primary coil current.

    • C. 

      C) Is 1:1 or 1/1, the voltage is the same in the primary and secondary coils, but the secondary coil current is always larger than the primary coil current.

    • D. 

      D) Is 1:2 or 1/2, the secondary coil voltage is two times larger than the primary coil voltage.

    • E. 

      E) Is less than one, the voltages and currents in the primary and secondary coils are equal.

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