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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?

SelectAnswer
AAll of these choices are correct
BExplosive gas can collect if not properly vented
CShock hazard due to high voltage
DIt emits ozone which can be harmful to the atmosphere

2. - T0B02

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

SelectAnswer
ARemove all tower grounding connections
BAll of the these choices are correct
CMake sure that you wear a grounded wrist strap
DPut 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?

SelectAnswer
ABy calculation based on FCC OET Bulletin 65
BBy calculation based on computer modeling
CBy measurement of field strength using calibrated equipment
DAll of these choices are correct

4. - T1A05

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

SelectAnswer
AAn amateur station located more than 50 km above the Earth's surface
BAny multi-stage satellite
CAn Earth satellite that carries one of more amateur operators
DAn 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?

SelectAnswer
ACW only
BCW and RTTY
CCW and SSB
DSSB 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?

SelectAnswer
AA reduction of one rank in operator class
BFine or imprisonment
CRequire the licensee to be re-examined
DRevocation 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?

SelectAnswer
AOnly when using amateur repeaters linked to the Internet
BOnly when broadcasting communications to or from the space shuttle.
COnly where noncommercial programming is gathered and supplied exclusively to the National Public Radio network
DOnly 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?

SelectAnswer
AUnattended control
BRadio control
CLocal control
DAutomatic control

9. - T1F11

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

SelectAnswer
AThose in ITU Regions 2 and 3 only
BThose in ITU Region 2 only
CAny station whose government permits such communications
DThose in ITU Region 3 only

10. - T2A08

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

SelectAnswer
ACall on the quarter hour
BOnly the called station should transmit
CCalling any station
DA 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?

SelectAnswer
AModulated carrier
BCTCSS
CCarrier squelch
DTone squelch

12. - T2C10

What is the preamble in a formal traffic message?

SelectAnswer
AThe message number
BThe priority handling indicator for the message
CThe first paragraph of the message text
DThe 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?

SelectAnswer
AFlip-flopping
BPulsing
CFrequency shifting
DPicket fencing

14. - T3B01

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

SelectAnswer
AWavelength
BWave speed
CWave spread
DWaveform

15. - T3C10

What is the radio horizon?

SelectAnswer
AThe farthest point you can see when standing at the base of your antenna tower
BThe shortest distance between two points on the Earth's surface
CThe distance at which radio signals between two points are effectively blocked by the curvature of the Earth
DThe distance from the ground to a horizontally mounted antenna

16. - T4A08

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

SelectAnswer
AFlat strap
BTwisted-pair cable
CRound copper-clad steel wire
DRound stranded wire

17. - T4B04

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

SelectAnswer
AEnable the CTCSS tones
BUse the scan mode to select the desired frequency
CDisable the CTCSS tones
DStore the frequency in a memory channel

18. - T5A05

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

SelectAnswer
AInductance
BCapacitance
CAmpere-hours
DVoltage

19. - T5B10

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

SelectAnswer
A6 dB
B3 dB
C9 dB
D1 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?

SelectAnswer
A30 watts
B0.208 watts
C14.5 watts
D4.8 watts

21. - T5D08

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

SelectAnswer
A20,000 amperes
B0.5 amperes
C100 amperes
D2 amperes

22. - T6A04

What electrical component stores energy in an electric field?

SelectAnswer
AResistor
BCapacitor
CDiode
DInductor

23. - T6B01

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

SelectAnswer
ATransistors
BInductors
CCapacitors
DResistors

24. - T6C03

What is component 2 in figure T1?

SelectAnswer
AIndicator lamp
BResistor
CConnector
DTransistor

25. - T6D01

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

SelectAnswer
ATransformer
BRectifier
CReflector
DAmplifier

26. - T7A08

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

SelectAnswer
ADiscriminator
BNoise blanker
CBeat frequency oscillator
DModulator

27. - T7B04

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

SelectAnswer
AImproper transmitter adjustment
BHarmonics from the transmitter
CThe telephone is inadvertently acting as a radio receiver
DPoor station grounding

28. - T7C04

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

SelectAnswer
A1 to 1
B2 to 1
C10 to 1
D1 to 3

29. - T7D05

What instrument is used to measure resistance?

SelectAnswer
AAn oscilloscope
BA spectrum analyzer
CA noise bridge
DAn ohmmeter

30. - T8A09

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

SelectAnswer
ALess than 500 Hz
BAbout 150 kHz
CBetween 5 and 15 kHz
DBetween 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?

SelectAnswer
AA telescope
BA satellite tracking program
CA field strength meter
DA GPS receiver

32. - T8C07

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

SelectAnswer
A1 watt
B25 watts
C500 milliwatts
D1500 watts

33. - T8D04

What type of transmission is indicated by the term NTSC?

SelectAnswer
AA special mode for earth satellite uplink
BA Normal Transmission mode in Static Circuit
CAn analog fast scan color TV signal
DA frame compression scheme for TV signals

34. - T9A02

Which of the following is true regarding vertical antennas?

SelectAnswer
AThe electric field is perpendicular to the Earth
BThe phase is reversed
CThe magnetic field is perpendicular to the Earth
DThe phase is inverted

35. - T9B07

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

SelectAnswer
AThey are a bayonet type connector
BThey are water tight
CThe are commonly used at HF frequencies
DThey are good for UHF frequencies