General's Course Practice Test #3

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General Class Written Examination - Element 3

To pass this exam you must correctly answer 26 of the 35 questions

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1. Why is automatic level control (ALC) used with an RF power amplifier?

1 point

To increase overall efficiency

To balance the transmitter audio frequency response

To reduce harmonic radiation

To prevent excessive drive

Clear selection

2. Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

1 point

Listen on the frequency for at least two minutes to be sure it is clear

All these choices are correct

Follow the voluntary band plan

Identify your station by transmitting your call sign at least 3 times

Clear selection

3. What is the function of a power supply bleeder resistor?

1 point

It acts as a fuse for excess voltage

It discharges the filter capacitors when power is removed

It removes shock hazards from the induction coils

It eliminates ground loop current

Clear selection

4. What is the recommended way to break into a phone contact?

1 point

Say your call sign once

Say “CQ” followed by the call sign of either station

Say “Breaker Breaker”

Say “QRZ” several times, followed by your call sign

Clear selection

5. What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

1 point

Minimum detectible signal level is reduced

The need for high resolution analog-to-digital converters is eliminated

All types of modulation can be created with appropriate processing

Automatic conversion of the signal from digital to analog

Clear selection

6. What is the purpose of a corona ball on an HF mobile antenna?

1 point

To increase the “Q” of the antenna

To reduce the chance of damage if the antenna should strike an object

To narrow the operating bandwidth of the antenna

To reduce RF voltage discharge from the tip of the antenna while transmitting

Clear selection

7. What happens when inductive and capacitive reactance are equal in a series LC circuit?

1 point

Resonance causes impedance to be very high

Impedance is equal to the geometric mean of the inductance and capacitance

Resonance causes impedance to be very low

Impedance is equal to the arithmetic mean of the inductance and capacitance

Clear selection

8. When operating a US station by remote control from outside the country, what license is required of the control operator?

1 point

A license from the foreign country and a special remote station permit from the FCC

A US operator/primary station license

Only an appropriate US operator/primary license and a special remote station permit from the FCC

Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US

Clear selection

9. For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

1 point

SSB

All these choices are correct

Clear selection

10. What kind of device is an integrated circuit operational amplifier?

1 point

Analog

Digital

Programmable Logic

MMIC

Clear selection

11. What must you do if your station fails to meet the FCC RF exposure exemption criteria?

1 point

Contact the FCC for permission to transmit

Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65

Use an FCC-approved band-pass filter

Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines

Clear selection

12. What kind of device is an integrated circuit operational amplifier?

1 point

Programmable Logic

MMIC

Analog

Digital

Clear selection

13. Who must observe the administration of a Technician class license examination?

1 point

At least three Volunteer Examiners of General class or higher

At least three Volunteer Examiners of Technician class

At least two Volunteer Examiners of General class or higher

At least two Volunteer Examiners of Technician class or higher

Clear selection

14. What is near vertical incidence skywave (NVIS) propagation?

1 point

Propagation near the MUF

Short distance MF or HF propagation at high elevation angles

Long path HF propagation at sunrise and sunset

Double hop propagation near the LUF

Clear selection

15. What is the relationship between high standing wave ratio (SWR) and transmission line loss?

1 point

High SWR reduces the relative effect of transmission line loss

There is no relationship between transmission line loss and SWR

High SWR makes it difficult to measure transmission line loss

High SWR increases loss in a lossy transmission line

Clear selection

16. How can you determine that your station complies with FCC RF exposure regulations?

1 point

By measurement of field strength using calibrated equipment

By calculation based on computer modeling

By calculation based on FCC OET Bulletin 65

All these choices are correct

Clear selection

17. Which of the following describes the function of a two-input AND gate?

1 point

Output is high when either or both inputs are low

Output is high only when both inputs are high

Output is low only when both inputs are high

Output is low when either or both inputs are high

Clear selection

18. What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

1 point

40 GHz

50 MHz

500 MHz

4 GHz

Clear selection

19. What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

1 point

It disrupts signals on lower frequencies more than those on higher frequencies

It enhances propagation on all HF frequencies

It disrupts communications via satellite more than direct communications

None, because only areas on the night side of the Earth are affected

Clear selection

20. In what segment of the 20-meter band are most digital mode operations commonly found?

1 point

In the middle of the CW segment, near 14.100 MHz

Between 14.070 MHz and 14.100 MHz

At the top of the SSB phone segment, near 14.325 MHz

At the bottom of the slow-scan TV segment, near 14.230 MHz

Clear selection

21. What does the term “critical angle” mean, as applied to radio wave propagation?

1 point

The long path azimuth of a distant station

The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions

The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions

The short path azimuth of a distant station

Clear selection

22. What is QRP operation?

1 point

Remote piloted model control

Low-power transmit operation

Traffic relay procedure net operation

Transmission using Quick Response Protocol

Clear selection

23. Why should wire-wound resistors not be used in RF circuits?

1 point

The resistor could overheat

The resistor’s internal capacitance would detune the circuit

The resistor’s inductance could make circuit performance unpredictable

The resistor’s tolerance value would not be adequate

Clear selection

24. How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

1 point

Approximately 11 watts

Approximately 61 milliwatts

Approximately 61 watts

Approximately 11 milliwatts

Clear selection

25. Which of the following one-way transmissions are permitted?

1 point

Transmissions to assist with learning the International Morse code

Regular transmissions offering equipment for sale, if intended for amateur radio use

Unidentified test transmissions of less than 10 seconds in duration

All these choices are correct

Clear selection

26. What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

1 point

2500 watts

625 watts

8.75 watts

5000 watts

Clear selection

27. How long does it take a coronal mass ejection to affect radio propagation on Earth?

1 point

4 to 8 minutes

28 days

15 hours to several days

14 days

Clear selection

28. How does an inductor react to AC?

1 point

As the amplitude of the applied AC increases, the reactance decreases

As the frequency of the applied AC increases, the reactance decreases

As the frequency of the applied AC increases, the reactance increases

As the amplitude of the applied AC increases, the reactance increases

Clear selection

29. What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

1 point

Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors

All these choices are correct

Compare vertical and horizontal signal strengths on the input frequency

Compare signal strengths between the input and output of the repeater

Clear selection

30. Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

1 point

The DC polarity of the socket is reversed from the polarity of modern HF transceivers

The socket is not wired with an RF-shielded power cable

The socket’s wiring may be inadequate for the current drawn by the transceiver

Drawing more than 50 watts from this socket could cause the engine to overheat

Clear selection

31. Which of the following components are used in a power supply filter network?

1 point

Diodes

Capacitors and inductors

Transformers and transducers

All these choices are correct

Clear selection

32. What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

1 point

Cyclic variation in Earth’s radiation belts

Long term oscillations in the upper atmosphere

Rotation of the Sun’s surface layers around its axis

The position of the Moon in its orbit

Clear selection

33. Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

1 point

Any stations outside the lower 48 states

Only contest stations

Only stations in Germany

Any caller is welcome to respond

Clear selection

34. How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

1 point

It is 20 times more powerful

It is 20 times less powerful

It is 10 times less powerful

It is 100 times more powerful

Clear selection

35. Which of the following frequencies is within the General class portion of the 15-meter band?

1 point

18155 kHz

24900 kHz

14250 kHz

21300 kHz

Clear selection

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