Practice Exam

T7B03

1. Which of the following can cause radio frequency interference?

• A. All these choices are correct
• B. Fundamental overload
• C. Harmonics
• D. Spurious emissions

T0B04

2. Which of the following is an important safety precaution to observe when putting up an antenna tower?

• A. Look for and stay clear of any overhead electrical wires
• B. Wear a ground strap connected to your wrist at all times
• C. All these choices are correct
• D. Insulate the base of the tower to avoid lightning strikes

T5D08

3. What is the current through a 100-ohm resistor connected across 200 volts?

• A. 0.5 amperes
• B. 100 amperes
• C. 2 amperes
• D. 20,000 amperes

T5B11

4. Which decibel value represents a power increase from 20 watts to 200 watts?

• A. 10 dB
• B. 12 dB
• C. 28 dB
• D. 18 dB

T8A09

5. What is the approximate bandwidth of a VHF repeater FM voice signal?

• A. Between 50 and 125 kHz
• B. Less than 500 Hz
• C. About 150 kHz
• D. Between 10 and 15 kHz

T3A03

6. What antenna polarization is normally used for long-distance CW and SSB contacts on the VHF and UHF bands?

• A. Vertical
• B. Left-hand circular
• C. Right-hand circular
• D. Horizontal

T0C05

7. Why do exposure limits vary with frequency?

• A. Higher frequency RF fields are transient in nature
• B. The human body absorbs more RF energy at some frequencies than at others
• C. Lower frequency RF fields have more energy than higher frequency fields
• D. Lower frequency RF fields do not penetrate the human body

T5C09

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

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

T8B06

9. Which of the following are inputs to a satellite tracking program?

• A. All these choices are correct
• B. The last observed time of zero Doppler shift
• C. The Keplerian elements
• D. The satellite transmitted power

T2C09

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

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

T5A10

11. Which term describes the rate at which electrical energy is used?

• A. Resistance
• B. Current
• C. Power
• D. Voltage

T9B05

12. What happens as the frequency of a signal in coaxial cable is increased?

• A. The loss decreases
• B. The loss increases
• C. The characteristic impedance decreases
• D. The characteristic impedance increases

T6C03

13. What is component 2 in figure T-1?

• A. Transistor
• B. Connector
• C. Resistor
• D. Indicator lamp

T6A02

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

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

T7D04

15. Which instrument is used to measure electric current?

• A. An ohmmeter
• B. An ammeter
• C. An electrometer
• D. A voltmeter

T3C11

16. Why is the radio horizon for VHF and UHF signals more distant than the visual horizon?

• A. Radio waves are not blocked by dust particles
• B. Radio waves are blocked by dust particles
• C. The atmosphere refracts radio waves slightly
• D. Radio signals move somewhat faster than the speed of light

T7C06

17. What does an SWR reading of 4:1 indicate?

• A. Loss of -4 dB
• B. Gain of +4 dB
• C. Good impedance match
• D. Impedance mismatch

T1B07

18. Which of the following VHF/UHF band segments are limited to CW only?

• A. 219 MHz to 220 MHz and 420.0 MHz to 420.1 MHz
• B. 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz
• C. 902.0 MHz to 902.1 MHz
• D. All these choices are correct

T4B10

19. Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?

• A. 500 Hz
• B. 1000 Hz
• C. 2400 Hz
• D. 5000 Hz

T1D07

20. What types of amateur stations can automatically retransmit the signals of other amateur stations?

• A. Repeater, auxiliary, or space stations
• B. Earth, repeater, or space stations
• C. Auxiliary, beacon, or Earth stations
• D. Beacon, repeater, or space stations

T6B01

21. Which is true about forward voltage drop in a diode?

• A. It is lower in some diode types than in others
• B. It has no impact on the voltage delivered to the load
• C. It is proportional to peak inverse voltage
• D. It indicates that the diode is defective

T6D07

22. Which of the following is commonly used as a visual indicator?

• A. LED
• B. Zener diode
• C. Bipolar transistor
• D. FET

T1F02

23. How often must you identify with your FCC-assigned call sign when using tactical call signs such as "Race Headquarters"?

• A. Never, the tactical call is sufficient
• B. Once during every hour
• C. At the end of each communication and every ten minutes during a communication
• D. At the end of every transmission

T8D06

24. What does the abbreviation "PSK" mean?

• A. Phase Shift Keying
• B. Pulse Shift Keying
• C. Phased Slide Keying
• D. Packet Short Keying

T7A01

25. Which term describes the ability of a receiver to detect the presence of a signal?

• A. Total Harmonic Distortion
• B. Selectivity
• C. Sensitivity
• D. Linearity

T2B02

26. What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver?

• A. Tone burst
• B. CTCSS
• C. Carrier squelch
• D. DTMF

T1E02

27. Who may be the control operator of a station communicating through an amateur satellite or space station?

• A. Only an Amateur Extra Class operator who is also an AMSAT member
• B. Any amateur allowed to transmit on the satellite uplink frequency
• C. Only an Amateur Extra Class operator
• D. A General class or higher licensee with a satellite operator certification

T3B02

28. What property of a radio wave defines its polarization?

• A. The ratio of the velocity to the wavelength
• B. The ratio of the energy in the magnetic field to the energy in the electric field
• C. The orientation of the magnetic field
• D. The orientation of the electric field

T0A10

29. What hazard is caused by charging or discharging a battery too quickly?

• A. Overheating or out-gassing
• B. Half-wave rectification
• C. Excess output ripple
• D. Inverse memory effect

T9A05

30. Which of the following increases the resonant frequency of a dipole antenna?

• A. Inserting coils in series with radiating wires
• B. Adding capacitive loading to the ends of the radiating wires
• C. Lengthening it
• D. Shortening it

T1C09

31. What is the grace period for renewal if an amateur license expires?

• A. Two years
• B. Ten years
• C. Three years
• D. Five years

T8C04

32. Which of the following is good procedure when contacting another station in a contest?

• A. Send only the minimum information needed for proper identification and the contest exchange
• B. Contact the station twice to be sure that you are in his log
• C. Sign only the last two letters of your call if there are many other stations calling
• D. All these choices are correct

T1A02

33. Which agency regulates and enforces the rules for the Amateur Radio Service in the United States?

• A. The FCC
• B. All these choices are correct
• C. Homeland Security
• D. FEMA

T4A04

34. How are the transceiver audio input and output connected in a station configured to operate using FT8?

• A. To a computer connected to the FT8converter.com website
• B. To a computer running a terminal program and connected to a terminal node controller unit
• C. To the audio input and output of a computer running WSJT-X software
• D. To an FT8 conversion unit, a keyboard, and a computer monitor

T2A03

35. What is a common repeater frequency offset in the 70 cm band?

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