Service Technician ConventionalUPDATED ACTUAL Questions And Correct
Answers
C
Terms in this set (218)
Which of the following is the distance occupied by 1 Wavelength.
hertz (Hz)?
What is the return signal pass band frequency used in 5-42 MHz.
most of North America?
What is the primary difference between coaxial express Taps are installed on coaxial distribution cable and not on express cable.
cable and coaxial distribution cable in an HFC
architecture?
Which testing device is the best to use to measure cable A time domain reflectometer (TDR).
faults?
Which of the following is used to define the waveform of Wavelength.
an optical signal?
What is the function of an interdiction unit? An interdiction unit controls the level of service to the drop ports it contains.
Which of the following devices is an active device? An addressable tap
The impedance of coaxial cable or a device is made up Resistance, inductance, and capacitance.
of the combined effects of which three electrical
properties?
When all other factors are equal, if the bonding wire and The bonding wire.
the cable connecting the drop cable to consumer
electronics are the same size, which should be shorter in
order to correctly bond the installation?
What is the definition of tap value? The signal loss between the tap input port and the tap ports.
Alternating current is a current 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.
A simple AC generator containing a wire loop rotating Through magnetism and mechanical motion.
between the poles of a magnet produces AC voltage
The amount of power lost as a result of conversion to Is directly proportional to the amount of resistance present and to the square of
heat in power transmission lines the amount of current.
, To transmit AC power efficiently, what power line 2 amps and 50,000 volts.
voltage-current combination would deliver the same
amount of power as 10 amps and 10,000 volts, but with
the least heat loss?
In a power transmission circuit, the transformer located Converts the high voltage, low current combination carried on the transmission
near the user's home, typically lines to a low voltage, high current combination for residential use.
All true AC waveforms Always are symmetrical about the horizontal axis.
The output voltage waveform generated by an AC Is called a sine wave.
generator during one complete rotation of the
generator's armature
The square wave and the sawtooth wave AC waveforms Seem to decrease "instantly" from a maximum positive value to a maximum
negative value of voltage or current.
The polarity of a DC waveform Does not change.
A fluctuating DC waveform Can be identical to an AC waveform, except that the fluctuating DC waveform
never changes polarity.
One cycle Is equal to one complete rotation of the armature of an AC generator.
What is the wavelength of one cycle of an AC waveform 3,750 km.
when: (1) the frequency of the waveform is 80 Hz; (2) the
speed of light is 300,000 kilometers per second; and (3)
the waveform has an amplitude of 5 volts?
What is the time period of one cycle or wavelength of an 0.0200 seconds.
AC waveform when the frequency of the waveform is 50
Hz?
A phase angle Is the amount of time, in degrees, it takes the waveform to change from the zero-
degree reference point to any other point on the waveform.
The amplitude of a waveform is defined as The maximum level of either half-cycle of the waveform.
The peak value of a waveform Is another name for the amplitude of the waveform.
What is the peak-to-peak value of an AC waveform when: 8.0 volts peak-to-peak.
(1) the frequency is 60 Hz; (2) the maximum negative
value of the waveform is -4 volts; and (3) the effective
value of the waveform is 2.83 volts?
Which of the following statements about instantaneous The instantaneous value is the value of a single point on the AC waveform at a
values is true? specific moment, or instant, of time.
The average value Is 3.18 volts for a waveform with a peak value of 5 volts.
Answers
C
Terms in this set (218)
Which of the following is the distance occupied by 1 Wavelength.
hertz (Hz)?
What is the return signal pass band frequency used in 5-42 MHz.
most of North America?
What is the primary difference between coaxial express Taps are installed on coaxial distribution cable and not on express cable.
cable and coaxial distribution cable in an HFC
architecture?
Which testing device is the best to use to measure cable A time domain reflectometer (TDR).
faults?
Which of the following is used to define the waveform of Wavelength.
an optical signal?
What is the function of an interdiction unit? An interdiction unit controls the level of service to the drop ports it contains.
Which of the following devices is an active device? An addressable tap
The impedance of coaxial cable or a device is made up Resistance, inductance, and capacitance.
of the combined effects of which three electrical
properties?
When all other factors are equal, if the bonding wire and The bonding wire.
the cable connecting the drop cable to consumer
electronics are the same size, which should be shorter in
order to correctly bond the installation?
What is the definition of tap value? The signal loss between the tap input port and the tap ports.
Alternating current is a current 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.
A simple AC generator containing a wire loop rotating Through magnetism and mechanical motion.
between the poles of a magnet produces AC voltage
The amount of power lost as a result of conversion to Is directly proportional to the amount of resistance present and to the square of
heat in power transmission lines the amount of current.
, To transmit AC power efficiently, what power line 2 amps and 50,000 volts.
voltage-current combination would deliver the same
amount of power as 10 amps and 10,000 volts, but with
the least heat loss?
In a power transmission circuit, the transformer located Converts the high voltage, low current combination carried on the transmission
near the user's home, typically lines to a low voltage, high current combination for residential use.
All true AC waveforms Always are symmetrical about the horizontal axis.
The output voltage waveform generated by an AC Is called a sine wave.
generator during one complete rotation of the
generator's armature
The square wave and the sawtooth wave AC waveforms Seem to decrease "instantly" from a maximum positive value to a maximum
negative value of voltage or current.
The polarity of a DC waveform Does not change.
A fluctuating DC waveform Can be identical to an AC waveform, except that the fluctuating DC waveform
never changes polarity.
One cycle Is equal to one complete rotation of the armature of an AC generator.
What is the wavelength of one cycle of an AC waveform 3,750 km.
when: (1) the frequency of the waveform is 80 Hz; (2) the
speed of light is 300,000 kilometers per second; and (3)
the waveform has an amplitude of 5 volts?
What is the time period of one cycle or wavelength of an 0.0200 seconds.
AC waveform when the frequency of the waveform is 50
Hz?
A phase angle Is the amount of time, in degrees, it takes the waveform to change from the zero-
degree reference point to any other point on the waveform.
The amplitude of a waveform is defined as The maximum level of either half-cycle of the waveform.
The peak value of a waveform Is another name for the amplitude of the waveform.
What is the peak-to-peak value of an AC waveform when: 8.0 volts peak-to-peak.
(1) the frequency is 60 Hz; (2) the maximum negative
value of the waveform is -4 volts; and (3) the effective
value of the waveform is 2.83 volts?
Which of the following statements about instantaneous The instantaneous value is the value of a single point on the AC waveform at a
values is true? specific moment, or instant, of time.
The average value Is 3.18 volts for a waveform with a peak value of 5 volts.
