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RIC-8 — Advanced Qualification Question Bank for Amateur Radio Operator Certificate
A-003-01-01 (1)
What is the easiest amplitude dimension
to measure by viewing a pure sine wave
on an oscilloscope?
- Peak-to-peak voltage
- Peak voltage
- RMS voltage
- Average voltage
A-003-01-02 (4)
What is the RMS value of a 340 volt peak-to-peak pure sine wave?
- 170 volts
- 240 volts
- 300 volts
- 120 volts
A-003-01-03 (2)
What is the equivalent to the RMS value
of an AC voltage?
- The AC voltage found by taking the square of the average value of the peak AC voltage
- The AC voltage causing the same heating of a given resistor as a DC voltage of the same value
- The DC voltage causing the same heating of a given resistor as the peak AC voltage
- The AC voltage found by taking the square root of the average AC value
A-003-01-04 (4)
If the peak value of a 100 Hz sinusoidal
waveform is 20 volts, the RMS value is:
- 28.28 volts
- 7.07 volts
- 16.38 volts
- 14.14 volts
A-003-01-05 (4)
In applying Ohm's law to AC circuits,
current and voltage values are:
- average values
- average values times 1.414
- none of the proposed answers
- peak values times 0.707
A-003-01-06 (2)
The effective value of a sine wave of
voltage or current is:
- 50% of the maximum value
- 70.7% of the maximum value
- 100% of the maximum value
- 63.6% of the maximum value
A-003-01-07 (3)
AC voltmeter scales are usually
calibrated to read:
- peak voltage
- instantaneous voltage
- RMS voltage
- average voltage
A-003-01-08 (3)
An AC voltmeter is calibrated to read
the:
- peak-to-peak value
- average value
- effective value
- peak value
A-003-01-09 (2)
Which AC voltage value will produce
the same amount of heat as a DC voltage, when applied to the same
resistance?
- The average value
- The RMS value
- The peak value
- The peak-to-peak value
A-003-01-10 (4)
What is the peak-to-peak voltage of a
sine wave that has an RMS voltage of
120 volts?
- 84.8 volts
- 169.7 volts
- 204.8 volts
- 339.5 volts
A-003-01-11 (2)
A sine wave of 17 volts peak is
equivalent to how many volts RMS?
- 24 volts
- 12 volts
- 34 volts
- 8.5 volts
A-003-02-01 (1)
The power supplied to the antenna
transmission line by a transmitter during
an RF cycle at the highest crest of the
modulation envelope is known as:
- peak-envelope power
- mean power
- carrier power
- full power
A-003-02-02 (3)
To compute one of the following,
multiply the peak-envelope voltage by
0.707 to obtain the RMS value, square
the result and divide by the load
resistance. Which is the correct answer?
- PIV
- ERP
- PEP
- power factor
A-003-02-03 (1)
Peak-Envelope Power (PEP) for SSB transmission is:
- Peak-Envelope Voltage (PEV) multiplied by 0.707, squared and divided by the load resistance
- peak-voltage multiplied by peak current
- equal to the rms power
- a hypothetical measurement
A-003-02-04 (2)
The formula to be used to calculate the
power output of a transmitter into a
resistor load using a voltmeter is:
- P = EI/R
- P = E^2/R
- P = EI cos 0
- P = IR
A-003-02-05 (1)
How is the output Peak-Envelope Power
of a transmitter calculated, if an
oscilloscope is used to measure the Peak-Envelope Voltage across a dummy
resistive load? PEP = Peak-Envelope — Power PEV = Peak-Envelope Voltage — Vp = peak-voltage — RL = load resistance
- PEP = [(0.707 PEV)(0.707 PEV)] / RL
- PEP = [(Vp)(Vp)] / (RL)
- PEP = (Vp)(Vp)(RL)
- PEP = [(1.414 PEV)(1.414 PEV)] / RL
A-003-02-06 (2)
What is the output PEP from a
transmitter if an oscilloscope measures
200 volts peak-to-peak across a 50-ohm dummy load connected to the transmitter
output?
- 400 watts
- 100 watts
- 1000 watts
- 200 watts
A-003-02-07 (2)
What is the output PEP from a
transmitter if an oscilloscope measures
500 volts peak-to-peak across a 50-ohm dummy load connected to the transmitter
output?
- 1250 watts
- 625 watts
- 2500 watts
- 500 watts
A-003-02-08 (3)
What is the output PEP of an
unmodulated carrier transmitter if a
wattmeter connected to the transmitter
output indicates an average reading of
1060 watts?
- 2120 watts
- 1500 watts
- 1060 watts
- 530 watts
A-003-02-09 (1)
What is the output PEP from a
transmitter, if an oscilloscope measures
400 volts peak-to-peak across a 50 ohm
dummy load connected to the transmitter
output?
- 400 watts
- 200 watts
- 600 watts
- 1000 watts
A-003-02-10 (2)
What is the output PEP from a
transmitter, if an oscilloscope measures
800 volts peak-to-peak across a 50 ohm
dummy load connected to the transmitter
output?
- 800 watts
- 1600 watts
- 6400 watts
- 3200 watts
A-003-02-11 (4)
An oscilloscope measures 500 volts peak-to-peak across a 50 ohm dummy
load connected to the transmitter output
during unmodulated carrier conditions.
What would an average-reading power
meter indicate under the same
transmitter conditions?
- 427.5 watts
- 884 watts
- 442 watts
- 625 watts
A-003-03-01 (3)
What is a dip meter?
- An SWR meter
- A marker generator
- A variable frequency oscillator with metered feedback current
- A field-strength meter
A-003-03-02 (4)
What does a dip meter do?
- It measures transmitter output power accurately
- It measures field strength accurately
- It measures frequency accurately
- It gives an indication of the resonant frequency of a circuit
A-003-03-03 (1)
What two ways could a dip meter be
used in an amateur station?
- To measure resonant frequencies of antenna traps and to measure a tuned circuit resonant frequency
- To measure antenna resonance and impedance
- To measure antenna resonance and percentage modulation
- To measure resonant frequency of antenna traps and percentage modulation
A-003-03-04 (1)
A dip meter supplies the radio frequency
energy which enables you to check:
- the resonant frequency of a circuit
- the calibration of an absorption-type wavemeter
- the impedance mismatch in a circuit
- the adjustment of an inductor
A-003-03-05 (1)
A dip meter may not be used to:
- measure the value of capacitance or inductance
- align transmitter-tuned circuits
- determine the frequency of oscillations
- align receiver-tuned circuits
A-003-03-06 (4)
The dial calibration on the output
attenuator of a signal generator:
- always reads the true output of the signal generator
- reads twice the true output when the attenuator is properly terminated
- reads half the true output when the attenuator is properly terminated
- reads accurately only when the attenuator is properly terminated
A-003-03-07 (2)
What is a signal generator?
- A low-stability oscillator which sweeps through a range of frequencies
- A high-stability oscillator which can produce a wide range of frequencies and amplitudes
- A low-stabilty oscillator used to inject a signal into a circuit under test
- A high-stability oscillator which generates reference signals at exact frequency intervals
A-003-03-08 (4)
A dip meter:
- should be tightly coupled to the circuit under test
- may be used only with series tuned circuits
- accurately measures frequencies
- should be loosely coupled to the circuit under test
A-003-03-09 (4)
A dip meter is:
- an SWR meter
- an RF amplifier tuning meter
- a battery electrolyte level gauge
- a variable frequency oscillator with metered feedback current
A-003-03-10 (3)
The dip meter is most directly applicable
to:
- operational amplifier circuits
- digital logic circuits
- parallel tuned circuits
- series tuned circuits
A-003-03-11 (4)
Which of the following is not a factor
affecting the frequency accuracy of a dip
meter?
- hand capacity
- stray capacity
- over coupling
- transmitter power output
A-003-04-01 (2)
What does a frequency counter do?
- It measures frequency deviation
- It makes frequency measurements
- It generates broad-band white noise for calibration
- It produces a reference frequency
A-003-04-02 (4)
What factors limit the accuracy,
frequency response and stability of a
frequency counter?
- Time base accuracy, temperature coefficient of the logic and time base stability
- Number of digits in the readout, speed of the logic, and time base stability
- Number of digits in the readout, external frequency reference and temperature coefficient of the logic
- Time base accuracy, speed of the logic, and time base stability
A-003-04-03 (4)
How can the accuracy of a frequency
counter be improved?
- By using slower digital logic
- By using faster digital logic
- By improving the accuracy of the frequency response
- By increasing the accuracy of the time base
A-003-04-04 (4)
If a frequency counter with a time base
accuracy of +/- 0.1 PPM reads 146 520
000 Hz, what is the most that the actual
frequency being measured could differ
from that reading? "PPM = parts per
million"
- 0.1 MHz
- 1.4652 Hz
- 1.4652 kHz
- 14.652 Hz
A-003-04-05 (1)
If a frequency counter, with a time base
accuracy of 10 PPM reads 146 520 000 Hz, what is the most the actual
frequency being measured could differ
from that reading? "PPM = parts per
million"
- 1465.2 Hz
- 146.52 Hz
- 146.52 kHz
- 1465.2 kHz
A-003-04-06 (1)
The clock in a frequency counter
normally uses a:
- crystal oscillator
- self-oscillating Hartley oscillator
- mechanical tuning fork
- free-running multivibrator
A-003-04-07 (3)
The frequency accuracy of a frequency
counter is determined by:
- the size of the frequency counter
- type of display used in the counter
- the characteristics of the internal timebase generator
- the number of digits displayed
A-003-05-01 (2)
If a 100 Hz signal is fed to the horizontal
input of an oscilloscope and a 150 Hz signal is fed to the vertical input, what
type of pattern should be displayed on
the screen?
- A rectangular pattern 100 mm wide and 150 mm high
- A looping pattern with 3 horizontal loops, and 2 vertical loops
- An oval pattern 100 mm wide and 150 mm high
- A looping pattern with 100 horizontal loops and 150 vertical loops
A-003-05-02 (2)
What factors limit the accuracy,
frequency response and stability of an
oscilloscope?
- Deflection amplifier output impedance and tube face frequency increments
- Accuracy of the time base and the linearity and bandwidth of the deflection amplifiers
- Accuracy and linearity of the time base and tube face voltage increments
- Tube face voltage increments and deflection amplifier voltages
A-003-05-03 (2)
How can the frequency response of an
oscilloscope be improved?
- By using a crystal oscillator as the time base and increasing the vertical sweep rate
- By increasing the horizontal sweep rate and the vertical amplifier frequency response
- By increasing the vertical sweep rate and the horizontal amplifier frequency response
- By using triggered sweep and a crystal oscillator for the timebase
A-003-05-04 (3)
You can use an oscilloscope to display
the input and output of a circuit at the
same time by:
- measuring the input on the X axis and the output on the Y axis
- measuring the input on the X axis and the output on the Z axis
- utilizing a dual trace oscilloscope
- measuring the input on the Y axis and the output on the X axis
A-003-05-05 (3)
An oscilloscope cannot be used to:
- measure frequency
- measure DC voltage
- determine FM carrier deviation
- determine the amplitude of complex voltage wave forms
A-003-05-06 (3)
The bandwidth of an oscilloscope is:
- directly related to gain compression
- indirectly related to screen persistence
- the highest frequency signal the scope can display
- a function of the time-base accuracy
A-003-05-07 (3)
When using Lissajous figures to
determine phase differences, an
indication of zero or 180 degrees is
represented on the screen of an
oscilloscope by:
- a horizontal straight line
- an ellipse
- a diagonal straight line
- a circle
A-003-05-08 (3)
A 100-kHz signal is applied to the
horizontal channel of an oscilloscope. A
signal of unknown frequency is applied
to the vertical channel. The resultant
wave form has 5 loops displayed
vertically and 2 loops horizontally. The
unknown frequency is:
- 20 kHz
- 50 kHz
- 40 kHz
- 30 kHz
A-003-05-09 (2)
What item of test equipment contains
horizontal and vertical channel
amplifiers?
- A signal generator
- An oscilloscope
- An ammeter
- An ohmmeter
A-003-05-10 (2)
What is the best instrument to use to
check the signal quality of a CW or single-sideband phone transmitter?
- A sidetone monitor
- An oscilloscope
- A signal tracer and an audio amplifier
- A field-strength meter
A-003-05-11 (1)
What signal source is connected to the
vertical input of an oscilloscope when
checking the quality of a transmitted
signal?
- the RF signals of a nearby receiving antenna
- the IF output of a monitoring receiver
- the audio input of the transmitter
- the RF output of the transmitter
A-003-06-01 (3)
A meter has a full-scale deflection of 40 microamps and an internal resistance of
96 ohms. You want it to read 0 to 1 mA. The value of the shunt to be used is:
- 24 ohms
- 16 ohms
- 4 ohms
- 40 ohms
A-003-06-02 (2)
A moving-coil milliammeter having a full-scale deflection of 1 mA and an
internal resistance of 0.5 ohms is to be
converted to a voltmeter of 20 volts fullscale
deflection. It would be necessary to
insert a:
- series resistance of 1 999.5 ohms
- series resistance of 19 999.5 ohms
- shunt resistance of 19 999.5 ohms
- shunt resistance of 19.5 ohms
A-003-06-03 (4)
A voltmeter having a range of 150 volts
and an internal resistance of 150 000
ohms is to be extended to read 750 volts.
The required multiplier resistor would
have a value of:
- 1 500 ohms
- 750 000 ohms
- 1 200 000 ohms
- 600 000 ohms
A-003-06-04 (1)
The sensitivity of an ammeter is an
expression of:
- the amount of current causing full-scale deflection
- the resistance of the meter
- the loading effect the meter will have on a circuit
- the value of the shunt resistor
A-003-06-05 (1)
Voltmeter sensitivity is usually
expressed in ohms per volt. This means
that a voltmeter with a sensitivity of 20 kilohms per volt would be a:
- 50 microampere meter
- 1 milliampere meter
- 50 milliampere meter
- 100 milliampere meter
A-003-06-06 (2)
The sensitivity of a voltmeter, whose
resistance is 150 000 ohms on the 150-volt range, is:
- 100 000 ohms per volt
- 1000 ohms per volt
- 10 000 ohms per volt
- 150 ohms per volt
A-003-06-07 (3)
The range of a DC ammeter can easily
be extended by:
- connecting an external resistance in series with the internal resistance
- changing the internal inductance of the meter
- connecting an external resistance in parallel with the internal resistance
- changing the internal capacitance of the meter to resonance
A-003-06-08 (2)
What happens inside a multimeter when
you switch it from a lower to a higher
voltage range?
- Resistance is reduced in series with the meter
- Resistance is added in series with the meter
- Resistance is reduced in parallel with the meter
- Resistance is added in parallel with the meter
A-003-06-09 (1)
How can the range of an ammeter be
increased?
- By adding resistance in parallel with the meter
- By adding resistance in series with the circuit under test
- By adding resistance in parallel with the circuit under test
- By adding resistance in series with the meter
A-003-06-10 (2)
Where should an RF wattmeter be
connected for the most accurate readings
of transmitter output power?
- One-half wavelength from the transmitter output
- At the transmitter output connector
- One-half wavelength from the antenna feed point
- At the antenna feed point
A-003-06-11 (4)
At what line impedance do most RF wattmeters usually operate?
- 25 ohms
- 100 ohms
- 300 ohms
- 50 ohms
- Date modified:
