Practice Exam

T0B03

1. Under what circumstances is it safe to climb a tower without a helper or observer?

• A. Never
• B. When the work being done is not more than 20 feet above the ground
• C. When no electrical work is being performed
• D. When no mechanical work is being performed

T9A11

2. What is antenna gain?

• A. The increase in impedance on receive or transmit compared to a reference antenna
• B. The additional power that is added to the transmitter power
• C. The increase in signal strength in a specified direction compared to a reference antenna
• D. The additional power that is required in the antenna when transmitting on a higher frequency

T5A07

3. Why are metals generally good conductors of electricity?

• A. They have many free electrons
• B. They have relatively high Young's modulus values
• C. They have many free protons
• D. They have relatively high density

T1C07

4. How long before the expiration date may an amateur radio license renewal be requested?

• A. 30 days
• B. 6 months
• C. 90 days
• D. 1 year

T6C07

5. What is component 8 in figure T-2?

• A. Light emitting diode
• B. Regulator IC
• C. Inductor
• D. Resistor

T6A02

6. What type of component is often used as an adjustable volume control?

• A. Power resistor
• B. Potentiometer
• C. Transformer
• D. Fixed resistor

T3C04

7. Which of the following types of propagation is most commonly associated with occasional strong signals on the 10-, 6-, and 2-meter bands from beyond the radio horizon?

• A. Backscatter
• B. Sporadic E
• C. D region absorption
• D. Gray-line propagation

T4A02

8. Which of the following should be considered when selecting an accessory SWR meter?

• A. The frequency and power level at which the measurements will be made
• B. The maximum SWR anticipated on the transmission line
• C. The ability of the meter to compensate for a poor transmission line match to the antenna
• D. The distance that the meter will be located from the antenna

T4B01

9. What is the effect of excessive microphone gain on SSB transmissions?

• A. Frequency instability
• B. Distorted transmitted audio
• C. Increased SWR
• D. Sideband inversion

T8C01

10. Which of the following methods is used to locate sources of noise interference or jamming?

• A. Phase locking
• B. Radio direction finding
• C. Doppler radar
• D. Echolocation

T1E07

11. When the control operator is not the station licensee, who is responsible for the proper operation of the station?

• A. The control operator and the station licensee
• B. All licensed amateurs who are present at the operation
• C. Only the control operator
• D. Only the station licensee

T3B12

12. Which of these frequencies travels at the highest velocity in free space?

• A. Microwaves
• B. VHF
• C. UHF
• D. All radio frequencies travel at the same velocity

T7D05

13. How does an ohmmeter measure the resistance of a circuit or component?

• A. By placing a variable resistor in parallel with the circuit
• B. By applying a variable voltage and measuring the resulting current change
• C. By applying a small current and measuring the resulting voltage
• D. By placing a variable resistor in series with the circuit

T0A01

14. Which of the following is a safety hazard of a 12-volt storage battery that lacks internal protection circuitry?

• A. Touching both terminals with your hands can cause electrical shock
• B. RF emissions from a nearby transmitter can cause the electrolyte to emit poison gas
• C. Shorting the terminals can cause burns, fire, or an explosion
• D. All these choices are correct

T8D02

15. What is FT8?

• A. A wideband FM voice mode
• B. An eight-channel multiplex mode for FM repeaters
• C. A digital slow-scan TV mode with forward error correction and automatic color compensation
• D. A digital mode capable of low signal-to-noise operation

T5B03

16. Which is equal to one kilovolt?

• A. One hundred volts
• B. One one-thousandth of a volt
• C. One million volts
• D. One thousand volts

T1B04

17. Which amateur band includes 146.52 MHz?

• A. 2 meters
• B. 20 meters
• C. 70 centimeters
• D. 6 meters

T5C09

18. How much power is delivered by a voltage of 13.8 volts DC and a current of 10 amperes?

• A. 0.7 watts
• B. 3.8 watts
• C. 23.8 watts
• D. 138 watts

T2B09

19. Why are simplex channels designated in the VHF/UHF band plans?

• A. So stations within range of each other can communicate without tying up a repeater
• B. So stations with simple transmitters can access the repeater without automated offset
• C. For working DX only
• D. For contest operation

T1F04

20. What language must you use for identification when using a phone emission?

• A. Any language recognized by the United Nations
• B. Any language recognized by the ITU
• C. English
• D. English, French, or Spanish

T6B02

21. What electronic component allows current to flow in only one direction?

• A. Diode
• B. Resistor
• C. Fuse
• D. Driven element

T9B12

22. What is standing wave ratio (SWR)?

• A. The transmitter efficiency ratio
• B. A measure of how well a load is matched to a transmission line
• C. An indication of the quality of your station's ground connection
• D. The ratio of amplifier power output to input

T6D01

23. Which of the following devices or circuits changes an alternating current into a varying direct current signal?

• A. Rectifier
• B. Transformer
• C. Reflector
• D. Amplifier

T2C09

24. Are amateur station control operators ever permitted to operate outside the frequency privileges of their license class?

• A. Yes, but only when part of a RACES emergency plan
• B. No
• C. Yes, but only in situations involving the immediate safety of human life or protection of property
• D. Yes, but only when part of a FEMA emergency plan

T3A11

25. Which region of the atmosphere can reflect HF radio waves?

• A. The ionosphere
• B. The electrosphere
• C. The troposphere
• D. The stratosphere

T0C07

26. What hazard is created by touching an antenna during a transmission?

• A. Exposure to ionizing radiation
• B. All these choices are correct
• C. Electrocution
• D. RF burn to skin

T5D09

27. What is the current through a 24-ohm resistor connected across 240 volts?

• A. 5760 amperes
• B. 10 amperes
• C. 2400 amperes
• D. 0.1 amperes

T8A10

28. What is the approximate bandwidth of AM fast-scan TV transmissions?

• A. About 1 MHz
• B. About 3 MHz
• C. About 6 MHz
• D. More than 10 MHz

T1A08

29. Who recommends transmit/receive channels for repeater and auxiliary stations?

• A. A Volunteer Frequency Coordinator recognized by local amateurs
• B. A Frequency Spectrum Manager appointed by the FCC
• C. The International Telecommunication Union
• D. An FCC Regional Field Office

T7B02

30. What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?

• A. The receiver is unable to reject strong signals outside the AM or FM band
• B. The deviation of an FM transmitter is set too low
• C. The audio amplifier of the transmitter is overloaded
• D. The microphone gain of the transmitter is turned up too high

T8B10

31. What does the term LEO mean in reference to communication satellites?

• A. Low Earth Orbit, which has a period of around 100 minutes
• B. Low Energy Orbit, which conserves battery power
• C. Low Elevation Orbit, which appears close to the horizon from the earth station
• D. Low Equilibrium Orbit, which has a slightly unstable period

T1D12

32. Which of the following is required when making on-the-air test transmissions?

• A. Conduct tests only between 10 p.m. and 6 a.m. local time
• B. Notify the FCC of the transmissions
• C. Identify the transmitting station
• D. All these choices are correct

T2A01

33. What is a common repeater frequency offset in the 2-meter band?

• A. Plus or minus 500 kHz
• B. Plus or minus 5 MHz
• C. Plus or minus 600 kHz
• D. Plus or minus 1 MHz

T7A08

34. Which of the following describes combining speech with an RF carrier signal?

• A. Low-pass filtering
• B. Oscillation
• C. Impedance matching
• D. Modulation

T7C01

35. What is the primary purpose of a dummy load?

• A. To improve the efficiency of an antenna
• B. To improve the signal-to-noise ratio of a receiver
• C. To prevent over-modulation of a transmitter
• D. To prevent transmitting signals over the air when making tests