Practice Exam

T6D02

1. What is a relay?

• A. A current controlled amplifier
• B. An electrically-controlled switch
• C. A pass transistor
• D. An inverting amplifier

T5D05

2. What is the resistance of a circuit for which the applied voltage is 12 volts and the current flow is 1.5 amperes?

• A. 0.125 ohms
• B. 8 ohms
• C. 13.5 ohms
• D. 18 ohms

T8B05

3. What is a satellite beacon?

• A. A transmission from a satellite that contains status information
• B. An indicator light that shows where to point your antenna
• C. A reflective surface on the satellite
• D. The primary transmit antenna on the satellite

T1E09

4. Which of the following are required for remote control operation?

• A. The control operator must indirectly manipulate the controls
• B. The control operator must be at the control point
• C. A control operator is required at all times
• D. All these choices are correct

T7D02

5. How is a voltmeter connected to a component to measure applied voltage?

• A. In parallel
• B. In phase
• C. In series
• D. In quadrature

T8A03

6. Which type of voice mode is often used for long-distance (weak signal) contacts on the VHF and UHF bands?

• A. FM
• B. DRM
• C. SSB
• D. PM

T2A06

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

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

T9A07

8. What is a disadvantage of using a handheld VHF transceiver with a flexible antenna inside a vehicle?

• A. The bandwidth of the antenna will decrease, increasing SWR
• B. All these choices are correct
• C. Signal strength is reduced due to the shielding effect of the vehicle
• D. The SWR might decrease, decreasing the signal strength

T2B13

9. What is the purpose of a squelch function?

• A. Reduce interference from impulse noise
• B. Mute the receiver audio when a signal is not present
• C. Eliminate parasitic oscillations in an RF amplifier
• D. Reduce a CW transmitter's key clicks

T7B10

10. What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible?

• A. Your transmitter is slightly off frequency
• B. You are in a bad location
• C. All these choices are correct
• D. Your batteries are running low

T5B03

11. Which is equal to one kilovolt?

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

T0A11

12. What hazard exists in a power supply immediately after turning it off?

• A. Voltage transients from kickback diodes
• B. Charge stored in filter capacitors
• C. Circulating currents in the dc filter
• D. Leakage flux in the power transformer

T9B01

13. What is a benefit of low SWR?

• A. Reduced television interference
• B. All these choices are correct
• C. Less antenna wear
• D. Reduced signal loss

T2C02

14. Which of the following are typical duties of a Net Control Station?

• A. Ensure that all stations checking into the net are properly licensed for operation on the net frequency
• B. Choose the regular net meeting time and frequency
• C. Call the net to order and direct communications between stations checking in
• D. All these choices are correct

T0B07

15. Which of the following is an important safety rule to remember when using a crank-up tower?

• A. This type of tower must never be grounded
• B. This type of tower must never be painted
• C. All these choices are correct
• D. This type of tower must not be climbed unless it is retracted, or mechanical safety locking devices have been installed

T6B01

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

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

T5C13

17. What is the abbreviation for kilohertz?

• A. khZ
• B. kHz
• C. KHZ
• D. khz

T4B02

18. Which of the following can be used to enter a transceiver's operating frequency?

• A. The keypad or VFO knob
• B. All these choices are correct
• C. The CTCSS or DTMF encoder
• D. The Automatic Frequency Control

T3A12

19. What is the effect of fog and rain on signals in the 10 meter and 6 meter bands?

• A. Absorption
• B. Range increase
• C. There is little effect
• D. Deflection

T7C09

20. Which of the following causes failure of coaxial cables?

• A. Solder flux contamination
• B. Rapid fluctuation in transmitter output power
• C. Operation at 100% duty cycle for an extended period
• D. Moisture contamination

T5A06

21. What is the unit of frequency?

• A. Hertz
• B. Henry
• C. Farad
• D. Tesla

T1B08

22. How are US amateurs restricted in segments of bands where the Amateur Radio Service is secondary?

• A. U.S. amateurs must give foreign amateur stations priority in those segments
• B. U.S. amateurs may find non-amateur stations in those segments, and must avoid interfering with them
• C. Digital transmissions are not permitted in those segments
• D. International communications are not permitted in those segments

T0C05

23. Why do exposure limits vary with frequency?

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

T1F03

24. When are you required to transmit your assigned call sign?

• A. At least every 10 minutes during and at the end of a communication
• B. At the beginning of each contact, and every 10 minutes thereafter
• C. At least once during each transmission
• D. At least every 15 minutes during and at the end of a communication

T3B07

25. In addition to frequency, which of the following is used to identify amateur radio bands?

• A. Traditional letter/number designators
• B. The approximate wavelength in meters
• C. Channel numbers
• D. All these choices are correct

T3C02

26. What is a characteristic of HF communication compared with communications on VHF and higher frequencies?

• A. There is less atmospheric interference (static) on HF
• B. HF accommodates wider bandwidth signals
• C. Long-distance ionospheric propagation is far more common on HF
• D. HF antennas are generally smaller

T8D10

27. Which of the following operating activities is supported by digital mode software in the WSJT-X software suite?

• A. All these choices are correct
• B. Meteor scatter
• C. Weak signal propagation beacons
• D. Earth-Moon-Earth

T1A10

28. What is the Radio Amateur Civil Emergency Service (RACES)?

• A. A radio service using amateur frequencies for emergency management or civil defense communications
• B. An emergency service using amateur operators certified by a civil defense organization as being enrolled in that organization
• C. All these choices are correct
• D. A radio service using amateur stations for emergency management or civil defense communications

T7A05

29. What is the name of a circuit that generates a signal at a specific frequency?

• A. Reactance modulator
• B. Phase modulator
• C. Oscillator
• D. Low-pass filter

T6C09

30. What is component 4 in figure T-2?

• A. Variable inductor
• B. Potentiometer
• C. Transformer
• D. Double-pole switch

T6A07

31. What electrical component is typically constructed as a coil of wire?

• A. Switch
• B. Diode
• C. Inductor
• D. Capacitor

T1D04

32. Under what conditions is an amateur station authorized to transmit music using a phone emission?

• A. When the music is transmitted above 1280 MHz
• B. When transmissions are limited to less than three minutes per hour
• C. When incidental to an authorized retransmission of manned spacecraft communications
• D. When the music produces no spurious emissions

T8C04

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

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

T1C03

34. What types of international communications are an FCC-licensed amateur radio station permitted to make?

• A. Any communications that would be permitted by an international broadcast station
• B. Communications incidental to conducting business or remarks of a personal nature
• C. Communications incidental to the purposes of the Amateur Radio Service and remarks of a personal character
• D. Only communications incidental to contest exchanges; all other communications are prohibited

T4A09

35. How can you determine the length of time that equipment can be powered from a battery?

• A. Divide the watt-hour rating of the battery by the peak power consumption of the equipment
• B. Multiply the watts per hour consumed by the equipment by the battery power rating
• C. Multiply the square of the current rating of the battery by the input resistance of the equipment
• D. Divide the battery ampere-hour rating by the average current draw of the equipment