Practice Exam

T4B09

1. How is a specific group of stations selected on a DMR digital voice transceiver?

• A. By enabling the group's CTCSS tone
• B. By retrieving the frequencies from transceiver memory
• C. By entering the group's identification code
• D. By inserting a five-pin, pre-programmed code plug

T1A07

2. What is the FCC Part 97 definition of a space station?

• A. A manned satellite orbiting Earth
• B. Any satellite orbiting Earth
• C. An amateur station located more than 50 km above Earth's surface
• D. An amateur station using amateur radio satellites for relay of signals

T6C04

3. What is component 3 in figure T-1?

• A. Resistor
• B. Transistor
• C. Lamp
• D. Ground symbol

T1F04

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

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

T0B03

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

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

T5D04

6. What is the resistance of a circuit in which a current of 3 amperes flows when connected to 90 volts?

• A. 270 ohms
• B. 1/30 ohm
• C. 30 ohms
• D. 3 ohms

T2A10

7. What is a band plan, beyond the privileges established by the FCC?

• A. A voluntary guideline for using different modes or activities within an amateur band
• B. A plan devised by a club to indicate frequency band usage
• C. A list of operating schedules
• D. A list of available net frequencies

T6A04

8. What electrical component stores energy in an electric field?

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

T8C01

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

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

T7B05

10. Which of the following might reduce interference by an amateur station to a non-amateur over-the-air radio receiver?

• A. Switch the transmitter to a narrow-band mode
• B. Block the amateur signal with a filter at the antenna input of the affected receiver
• C. Block the interfering signal with a filter on the amateur transmitter
• D. Switch the transmitter from FM to SSB

T5C06

11. What is the abbreviation for kilohertz?

• A. KHz
• B. kHz
• C. khz
• D. KHZ

T7A04

12. Which term describes the ability of a receiver to discriminate between multiple signals?

• A. Sensitivity
• B. Harmonic distortion
• C. Selectivity
• D. Discrimination ratio

T8A09

13. What is the approximate bandwidth of an FM voice signal on VHF repeaters?

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

T6B06

14. How is the cathode lead of a semiconductor diode often marked on the package?

• A. With a stripe
• B. With the letter K
• C. With the letter C
• D. With the word "cathode"

T5A08

15. Which of the following is a good electrical insulator?

• A. Graphite
• B. Sea water
• C. Stainless steel
• D. Glass

T8D09

16. What is CW?

• A. A type of electromagnetic propagation
• B. Error correction for digital transmission using code words
• C. A digital mode used primarily on 2-meter FM
• D. Another name for a Morse code transmission

T9B01

17. Which of the following connectors should be carefully taped for weather protection when used outdoors?

• A. PL259
• B. Type N
• C. BNC
• D. All these choices are correct

T8B09

18. What causes spin fading of satellite signals?

• A. Circular polarized noise interference radiated from the sun
• B. Doppler shift of the received signal
• C. Rotation of the satellite and its antennas
• D. Interfering signals within the satellite uplink band

T2B13

19. What is the purpose of a squelch function?

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

T1C02

20. Who may select a desired call sign under the vanity call sign rules?

• A. Only a licensed amateur with a General or Amateur Extra Class license
• B. Only a licensed amateur with an Amateur Extra Class license
• C. Any licensed amateur
• D. Only a licensed amateur who has been licensed continuously for more than 10 years

T2C04

21. What is RACES?

• A. An emergency organization combining amateur radio and citizens band operators and frequencies
• B. A radio contest held in a short period, sometimes called a "sprint"
• C. An international radio experimentation society
• D. An FCC Part 97 amateur radio service for civil defense communications during national emergencies

T7C05

22. Why do most solid-state transmitters reduce output power as SWR increases beyond a certain level?

• A. To comply with FCC rules on spectral purity
• B. To protect the RF output amplifier transistors
• C. To lower the SWR on the transmission line
• D. Because power supplies cannot supply enough current at high SWR

T6D03

23. Which of the following is a reason to use shielded wire?

• A. To prevent coupling of unwanted signals to or from the wire
• B. To decrease the resistance of DC power connections
• C. To increase the current carrying capability of the wire
• D. To reduce receiver overload

T0A07

24. Where should a lightning arrester be installed in a coaxial feed line?

• A. On a grounded panel near where feed lines enter the building
• B. At the AC power service panel
• C. At the antenna feed point
• D. At the output connector of a transceiver

T7D03

25. When configured to measure current, how is a multimeter connected to a component?

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

T3B11

26. What is the approximate velocity of a radio wave in free space?

• A. 300,000,000 miles per hour
• B. 150,000,000 meters per second
• C. 150,000,000 miles per hour
• D. 300,000,000 meters per second

T9A02

27. Which of the following describes a type of antenna loading?

• A. Inserting a resistor in the radiating portion of the antenna to make it resonant
• B. Strengthening the radiating elements of a beam antenna to better resist wind damage
• C. Electrically lengthening by inserting inductors in radiating elements
• D. Installing a spring in the base of a mobile vertical antenna to make it more flexible

T1B07

28. 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

T5B04

29. Which is equal to one microvolt?

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

T3C02

30. 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. HF antennas are generally smaller
• D. Long-distance ionospheric propagation is far more common on HF

T1E08

31. Which of the following is an example of automatic control?

• A. Controlling a station over the internet
• B. Using a computer or other device to identify automatically
• C. Using a computer or other device to send CW automatically
• D. Repeater operation

T4A07

32. Which of the following is one of the connections required between a computer and a transceiver to operate digital modes?

• A. Computer "line in" to transceiver push-to-talk
• B. Computer "line out" to transceiver speaker connector
• C. Computer "line in" to transceiver speaker connector
• D. Computer "line out" to transceiver push-to-talk

T3A07

33. What weather condition might decrease range at microwave frequencies?

• A. Colder temperatures
• B. Low barometric pressure
• C. High winds
• D. Precipitation

T1D07

34. Which of the following is an example of an auxiliary station?

• A. A second station utilized in multi-operator contest stations
• B. A backup radio for emergency use in case the main station radio fails
• C. A station used in the Military Auxiliary Radio System for linking government and amateur stations in a digital network
• D. A station sending one-way transmissions between a remote repeater receiver and the main repeater transmitter

T0C10

35. Why is duty cycle one of the factors used to determine safe RF radiation exposure levels?

• A. It affects the average exposure to radiation
• B. It takes into account the antenna feed line loss
• C. It takes into account the thermal effects of the final amplifier
• D. It affects the peak exposure to radiation