US Amateur Radio - Technician (Element 2, 2022-2026) Practice Test

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US Amateur Radio - Technician (Element 2, 2022-2026) Practice Test

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1. - T0A02

What health hazard is presented by electrical current flowing through the body?

Select	Answer
A	It may cause injury by heating tissue
B	It may disrupt the electrical functions of cells
C	It may cause involuntary muscle contractions
D	All these choices are correct

2. - T0B06

What is the minimum safe distance from a power line to allow when installing an antenna?

Select	Answer
A	The height of the power line above ground
B	1/2 wavelength at the operating frequency
C	Add the height of the antenna to the height of the power line and multiply by a factor of 1.5
D	Enough so that if the antenna falls, no part of it can come closer than 10 feet to the power wires

3. - T0C03

How does the allowable power density for RF safety change if duty cycle changes from 100 percent to 50 percent?

Select	Answer
A	It increases by a factor of 3
B	There is no adjustment allowed for lower duty cycle
C	It decreases by 50 percent
D	It increases by a factor of 2

4. - T1A06

What is the FCC Part 97 definition of a beacon?

Select	Answer
A	A government transmitter marking the amateur radio band edges
B	A continuous transmission of weather information authorized in the amateur bands by the National Weather Service
C	An amateur station transmitting communications for the purposes of observing propagation or related experimental activities
D	A bulletin sent by the FCC to announce a national emergency

5. - T1B09

Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band?

Select	Answer
A	So that modulation sidebands do not extend beyond the band edge
B	To allow for calibration error in the transmitter frequency display
C	All these choices are correct
D	To allow for transmitter frequency drift

6. - T1C03

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

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

7. - T1D03

When is it permissible to transmit messages encoded to obscure their meaning?

Select	Answer
A	Only during contests
B	Only when transmitting certain approved digital codes
C	Only when transmitting control commands to space stations or radio control craft
D	Never

8. - T1E09

Which of the following are required for remote control operation?

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

9. - T1F06

Which of the following self-assigned indicators are acceptable when using a phone transmission?

Select	Answer
A	KL7CC slant W3
B	KL7CC slash W3
C	KL7CC stroke W3
D	All these choices are correct

10. - T2A10

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

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

11. - T2B05

What would cause your FM transmission audio to be distorted on voice peaks?

Select	Answer
A	Your transmit power is too high
B	You need to talk louder
C	Your repeater offset is inverted
D	You are talking too loudly

12. - T2C11

What is meant by “check” in a radiogram header?

Select	Answer
A	The number of words or word equivalents in the text portion of the message
B	The call sign of the originating station
C	A box on the message form that indicates that the message was received and/or relayed
D	A list of stations that have relayed the message

13. - T3A04

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

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

14. - T3B05

What is the relationship between wavelength and frequency?

Select	Answer
A	Wavelength gets longer as frequency increases
B	Wavelength and frequency increase as path length increases
C	Wavelength gets shorter as frequency increases
D	Wavelength and frequency are unrelated

15. - T3C03

What is a characteristic of VHF signals received via auroral backscatter?

Select	Answer
A	They occur only during winter nighttime hours
B	They are generally strongest when your antenna is aimed west
C	They are distorted and signal strength varies considerably
D	They are often received from 10,000 miles or more

16. - T4A09

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

Select	Answer
A	Divide the battery ampere-hour rating by the average current draw 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 watt-hour rating of the battery by the peak power consumption of the equipment

17. - T4B07

What does a DMR “code plug” contain?

Select	Answer
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

18. - T5A01

Electrical current is measured in which of the following units?

Select	Answer
A	Volts
B	Amperes
C	Ohms
D	Watts

19. - T5B13

Which is equal to 2425 MHz?

Select	Answer
A	0.002425 GHz
B	24.25 GHz
C	2425 GHz
D	2.425 GHz

20. - T5C04

What is the unit of inductance?

Select	Answer
A	The ohm
B	The farad
C	The coulomb
D	The henry

21. - T5D14

In which type of circuit is voltage the same across all components?

Select	Answer
A	Parallel
B	Series
C	Resonant
D	Branch

22. - T6A09

What electrical component is used to protect other circuit components from current overloads?

Select	Answer
A	Fuse
B	Thyratron
C	Varactor
D	All these choices are correct

23. - T6B10

Which of the following can provide power gain?

Select	Answer
A	Transformer
B	Reactor
C	Transistor
D	Resistor

24. - T6C08

What is component 9 in figure T-2?

Select	Answer
A	Variable capacitor
B	Variable transformer
C	Variable inductor
D	Variable resistor

25. - T6D08

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

Select	Answer
A	Resistor
B	Potentiometer
C	Zener diode
D	Capacitor

26. - T7A10

What device increases the transmitted output power from a transceiver?

Select	Answer
A	All these choices are correct
B	An impedance network
C	A voltage divider
D	An RF power amplifier

27. - T7B02

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

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

28. - T7C08

Which instrument can be used to determine SWR?

Select	Answer
A	Ohmmeter
B	Voltmeter
C	Directional wattmeter
D	Iambic pentameter

29. - T7D06

Which of the following can damage a multimeter?

Select	Answer
A	Failing to connect one of the probes to ground
B	Attempting to measure resistance using the voltage setting
C	Attempting to measure voltage when using the resistance setting
D	Not allowing it to warm up properly

30. - T8A05

Which of the following types of signal has the narrowest bandwidth?

Select	Answer
A	SSB voice
B	Slow-scan TV
C	CW
D	FM voice

31. - T8B06

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

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

32. - T8C06

How is over the air access to IRLP nodes accomplished?

Select	Answer
A	By using DTMF signals
B	By obtaining a password that is sent via voice to the node
C	By using CTCSS tone codes
D	By entering the proper internet password

33. - T8D11

What is an ARQ transmission system?

Select	Answer
A	A system used to encrypt command signals to an amateur radio satellite
B	A method of compressing data using autonomous reiterative Q codes prior to final encoding
C	A special transmission format limited to video signals
D	An error correction method in which the receiving station detects errors and sends a request for retransmission

34. - T9A05

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

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

35. - T9B05

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

Select	Answer
A	The loss increases
B	The loss decreases
C	The characteristic impedance increases
D	The characteristic impedance decreases

Figure T-2