Practice Exam

T4B07

1. What does a DMR "code plug" contain?

• A. The DMR software version
• B. The codec for digitizing audio
• C. Access information for repeaters and talkgroups
• D. Your call sign in CW for automatic identification

T2A05

2. How should you respond to a station calling CQ?

• A. Transmit the other station's call sign followed by your call sign
• B. Transmit your call sign followed by the other station's call sign
• C. Transmit a signal report followed by your call sign
• D. Transmit "CQ" followed by the other station's call sign

T7D04

3. Which instrument is used to measure electric current?

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

T1D05

4. When may amateur radio operators use their stations to notify other amateurs of the availability of equipment for sale or trade?

• A. When no profit is made on the sale
• B. When the equipment is not the personal property of either the station licensee, or the control operator, or their close relatives
• C. When selling amateur radio equipment and not on a regular basis
• D. Never

T9B07

5. Which of the following is true of PL-259 type coax connectors?

• A. They are a bayonet-type connector
• B. They are watertight
• C. They are commonly used at HF and VHF frequencies
• D. They are preferred for microwave operation

T0B03

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

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

T8B04

7. What mode of transmission is commonly used by amateur radio satellites?

• A. SSB
• B. FM
• C. All these choices are correct
• D. CW/data

T8D08

8. Which of the following is included in packet radio transmissions?

• A. A check sum that permits error detection
• B. A header that contains the call sign of the station to which the information is being sent
• C. Automatic repeat request in case of error
• D. All these choices are correct

T1C05

9. Which of the following is a valid Technician class call sign format?

• A. W1XX
• B. KF1XXX
• C. KA1X
• D. All these choices are correct

T6D08

10. Which of the following is combined with an inductor to make a resonant circuit?

• A. Capacitor
• B. Zener diode
• C. Resistor
• D. Potentiometer

T6B05

11. What type of transistor has a gate, drain, and source?

• A. Bipolar junction
• B. Varistor
• C. Field-effect
• D. Tesla-effect

T5B09

12. Which decibel value most closely represents a power increase from 5 watts to 10 watts?

• A. 5 dB
• B. 2 dB
• C. 3 dB
• D. 10 dB

T4A03

13. Why are short, heavy-gauge wires used for a transceiver's DC power connection?

• A. All these choices are correct
• B. To provide a good counterpoise for the antenna
• C. To avoid RF interference
• D. To minimize voltage drop when transmitting

T3A04

14. What happens when antennas at opposite ends of a VHF or UHF line of sight radio link are not using the same polarization?

• A. Signals have an echo effect
• B. Received signal strength is reduced
• C. The modulation sidebands might become inverted
• D. Nothing significant will happen

T5C07

15. What is the abbreviation for megahertz?

• A. MH
• B. mh
• C. MHz
• D. Mhz

T1E05

16. What is an amateur station's control point?

• A. The location of the station's transmitting apparatus
• B. The location of the station's transmitting antenna
• C. The mailing address of the station licensee
• D. The location at which the control operator function is performed

T0A05

17. Why should a 5-ampere fuse never be replaced with a 20-ampere fuse?

• A. Excessive current could cause a fire
• B. All these choices are correct
• C. The power supply ripple would greatly increase
• D. The larger fuse would be likely to blow because it is rated for higher current

T6A08

18. What is the function of an SPDT switch?

• A. A single circuit is switched between one of two other circuits
• B. Two circuits are opened or closed
• C. Two circuits are each switched between one of two other circuits
• D. A single circuit is opened or closed

T1A10

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

• A. A radio service using amateur stations 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 frequencies for emergency management or civil defense communications

T7C11

20. What is a disadvantage of air core coaxial cable when compared to foam or solid dielectric types?

• A. It cannot be used for VHF or UHF antennas
• B. It has more loss per foot
• C. It requires special techniques to prevent moisture in the cable
• D. It cannot be used at below freezing temperatures

T5A04

21. What are the units of electrical resistance?

• A. Siemens
• B. Ohms
• C. Coulombs
• D. Mhos

T8C04

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

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

T0C07

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

• A. Radiation poisoning
• B. All these choices are correct
• C. RF burn to skin
• D. Electrocution

T5D11

24. What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it?

• A. 9 volts
• B. 1 volt
• C. 10 volts
• D. 11 volts

T6C12

25. Which of the following is accurately represented in electrical schematics?

• A. Component connections
• B. All these choices are correct
• C. Wire lengths
• D. Physical appearance of components

T8A01

26. Which of the following is a form of amplitude modulation?

• A. Spread spectrum
• B. Packet radio
• C. Phase shift keying (PSK)
• D. Single sideband

T3B01

27. What is the relationship between the electric and magnetic fields of an electromagnetic wave?

• A. They are in parallel
• B. They travel at different speeds
• C. They revolve in opposite directions
• D. They are at right angles

T3C01

28. Why are simplex UHF signals rarely heard beyond their radio horizon?

• A. UHF signals are absorbed by the ionospheric D region
• B. FCC regulations prohibit them from going more than 50 miles
• C. UHF signals are usually not propagated by the ionosphere
• D. They are too weak to go very far

T1F11

29. Which of the following is a requirement for the issuance of a club station license grant?

• A. The club must be registered with the American Radio Relay League
• B. The trustee must have an Amateur Extra Class operator license grant
• C. All these choices are correct
• D. The club must have at least four members

T2C05

30. What does the term "traffic" refer to in net operation?

• A. Requests to activate the net by a served agency
• B. Operation by mobile or portable stations
• C. The number of stations checking in and out of a net
• D. Messages exchanged by net stations

T1B07

31. 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. 902.0 MHz to 902.1 MHz
• C. All these choices are correct
• D. 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz

T2B12

32. What is the purpose of the color code used on DMR repeater systems?

• A. Identifies the codec used
• B. Defines the minimum signal level required for access
• C. Defines the frequency pair to use
• D. Must match the repeater color code for access

T9A06

33. Which of the following types of antenna offers the greatest gain?

• A. J pole
• B. Isotropic
• C. Yagi
• D. 5/8 wave vertical

T7B09

34. What should be the first step to resolve non-fiber optic cable TV interference caused by your amateur radio transmission?

• A. Be sure all TV feed line coaxial connectors are installed properly
• B. Add a preamplifier to the TV antenna input
• C. Add a low-pass filter to the TV antenna input
• D. Add a high-pass filter to the TV antenna input

T7A01

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

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