US Amateur Radio - Technician 2010 Practice Test

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US Amateur Radio - Technician 2010 Practice Test

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1. - T0A09

What kind of hazard is presented by a conventional 12-volt storage battery?

Select	Answer
A	All of these choices are correct
B	Explosive gas can collect if not properly vented
C	Shock hazard due to high voltage
D	It emits ozone which can be harmful to the atmosphere

2. - T0B02

What is a good precaution to observe before climbing an antenna tower?

Select	Answer
A	Remove all tower grounding connections
B	All of the these choices are correct
C	Make sure that you wear a grounded wrist strap
D	Put on a climbing harness and safety glasses

3. - T0C06

Which of the following is an acceptable method to determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By calculation based on FCC OET Bulletin 65
B	By calculation based on computer modeling
C	By measurement of field strength using calibrated equipment
D	All of these choices are correct

4. - T1A05

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

Select	Answer
A	An amateur station located more than 50 km above the Earth's surface
B	Any multi-stage satellite
C	An Earth satellite that carries one of more amateur operators
D	An amateur station located less than 25 km above the Earth's surface

5. - T1B11

What emission modes are permitted in the mode-restricted sub-bands at 50.0 to 50.1 MHz and 144.0 to 144.1 MHz?

Select	Answer
A	CW only
B	CW and RTTY
C	CW and SSB
D	SSB only

6. - T1C07

What may result when correspondence from the FCC is returned as undeliverable because the grantee failed to provide the correct mailing address?

Select	Answer
A	A reduction of one rank in operator class
B	Fine or imprisonment
C	Require the licensee to be re-examined
D	Revocation of the station license or suspension of the operator license

7. - T1D09

Under which of the following circumstances are amateur stations authorized to transmit signals related to broadcasting, program production, or news gathering, assuming no other means is available?

Select	Answer
A	Only when using amateur repeaters linked to the Internet
B	Only when broadcasting communications to or from the space shuttle.
C	Only where noncommercial programming is gathered and supplied exclusively to the National Public Radio network
D	Only where such communications directly relate to the immediate safety of human life or protection of property

8. - T1E09

What type of control is being used when transmitting using a handheld radio?

Select	Answer
A	Unattended control
B	Radio control
C	Local control
D	Automatic control

9. - T1F11

To which foreign stations do the FCC rules authorize the transmission of non-emergency third party communications?

Select	Answer
A	Those in ITU Regions 2 and 3 only
B	Those in ITU Region 2 only
C	Any station whose government permits such communications
D	Those in ITU Region 3 only

10. - T2A08

What is the meaning of the procedural signal "CQ"?

Select	Answer
A	Call on the quarter hour
B	Only the called station should transmit
C	Calling any station
D	A new antenna is being tested (no station should answer)

11. - T2B03

Which of the following describes the muting of receiver audio controlled solely by the presence or absence of an RF signal?

Select	Answer
A	Modulated carrier
B	CTCSS
C	Carrier squelch
D	Tone squelch

12. - T2C10

What is the preamble in a formal traffic message?

Select	Answer
A	The message number
B	The priority handling indicator for the message
C	The first paragraph of the message text
D	The information needed to track the message as it passes through the amateur radio traffic handling system

13. - T3A06

What term is commonly used to describe the rapid fluttering sound sometimes heard from mobile stations that are moving while transmitting?

Select	Answer
A	Flip-flopping
B	Pulsing
C	Frequency shifting
D	Picket fencing

14. - T3B01

What is the name for the distance a radio wave travels during one complete cycle?

Select	Answer
A	Wavelength
B	Wave speed
C	Wave spread
D	Waveform

15. - T3C10

What is the radio horizon?

Select	Answer
A	The farthest point you can see when standing at the base of your antenna tower
B	The shortest distance between two points on the Earth's surface
C	The distance at which radio signals between two points are effectively blocked by the curvature of the Earth
D	The distance from the ground to a horizontally mounted antenna

16. - T4A08

Which type of conductor is best to use for RF grounding?

Select	Answer
A	Flat strap
B	Twisted-pair cable
C	Round copper-clad steel wire
D	Round stranded wire

17. - T4B04

What is a way to enable quick access to a favorite frequency on your transceiver?

Select	Answer
A	Enable the CTCSS tones
B	Use the scan mode to select the desired frequency
C	Disable the CTCSS tones
D	Store the frequency in a memory channel

18. - T5A05

What is the electrical term for the electromotive force (EMF) that causes electron flow?

Select	Answer
A	Inductance
B	Capacitance
C	Ampere-hours
D	Voltage

19. - T5B10

What is the approximate amount of change, measured in decibels (dB), of a power decrease from 12 watts to 3 watts?

Select	Answer
A	6 dB
B	3 dB
C	9 dB
D	1 dB

20. - T5C10

How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?

Select	Answer
A	30 watts
B	0.208 watts
C	14.5 watts
D	4.8 watts

21. - T5D08

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

Select	Answer
A	20,000 amperes
B	0.5 amperes
C	100 amperes
D	2 amperes

22. - T6A04

What electrical component stores energy in an electric field?

Select	Answer
A	Resistor
B	Capacitor
C	Diode
D	Inductor

23. - T6B01

What class of electronic components is capable of using a voltage or current signal to control current flow?

Select	Answer
A	Transistors
B	Inductors
C	Capacitors
D	Resistors

24. - T6C03

What is component 2 in figure T1?

Select	Answer
A	Indicator lamp
B	Resistor
C	Connector
D	Transistor

25. - T6D01

Which of the following devices or circuits changes an alternating current into a varying direct current signal?

Select	Answer
A	Transformer
B	Rectifier
C	Reflector
D	Amplifier

26. - T7A08

Which of the following circuits combines a speech signal and an RF carrier?

Select	Answer
A	Discriminator
B	Noise blanker
C	Beat frequency oscillator
D	Modulator

27. - T7B04

What is the most likely cause of interference to a non-cordless telephone from a nearby transmitter?

Select	Answer
A	Improper transmitter adjustment
B	Harmonics from the transmitter
C	The telephone is inadvertently acting as a radio receiver
D	Poor station grounding

28. - T7C04

What reading on an SWR meter indicates a perfect impedance match between the antenna and the feedline?

Select	Answer
A	1 to 1
B	2 to 1
C	10 to 1
D	1 to 3

29. - T7D05

What instrument is used to measure resistance?

Select	Answer
A	An oscilloscope
B	A spectrum analyzer
C	A noise bridge
D	An ohmmeter

30. - T8A09

What is the approximate bandwidth of a VHF repeater FM phone signal?

Select	Answer
A	Less than 500 Hz
B	About 150 kHz
C	Between 5 and 15 kHz
D	Between 50 and 125 kHz

31. - T8B06

What can be used to determine the time period during which an amateur satellite or space station can be accessed?

Select	Answer
A	A telescope
B	A satellite tracking program
C	A field strength meter
D	A GPS receiver

32. - T8C07

What is the maximum power allowed when transmitting telecommand signals to radio controlled models?

Select	Answer
A	1 watt
B	25 watts
C	500 milliwatts
D	1500 watts

33. - T8D04

What type of transmission is indicated by the term NTSC?

Select	Answer
A	A special mode for earth satellite uplink
B	A Normal Transmission mode in Static Circuit
C	An analog fast scan color TV signal
D	A frame compression scheme for TV signals

34. - T9A02

Which of the following is true regarding vertical antennas?

Select	Answer
A	The electric field is perpendicular to the Earth
B	The phase is reversed
C	The magnetic field is perpendicular to the Earth
D	The phase is inverted

35. - T9B07

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

Select	Answer
A	They are a bayonet type connector
B	They are water tight
C	The are commonly used at HF frequencies
D	They are good for UHF frequencies