Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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T4A01 What must be considered to determine the
minimum current capacity needed for a transceiver power supply?
a. | Efficiency of the transmitter at full power
output | c. | Power supply regulation and heat
dissipation | b. | Receiver and
control circuit power | d. | All of these choices are
correct |
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2.
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T4A02 How might a computer be used as part of
an amateur radio station?
a. | For logging contacts and contact
information | c. | For generating and decoding digital
signals | b. | For sending and/or receiving
CW | d. | All of these choices are correct |
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3.
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T4A03 Why should wiring between the power source
and radio be heavy-gauge wire and kept as short as possible?
a. | To avoid voltage falling below that needed for proper
operation | c. | To avoid RF interference | b. | To provide a good counterpoise for the antenna | d. | All of these
choices are correct |
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4.
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T4A04 Which computer sound card port is connected
to a transceiver's headphone or speaker output for operating digital modes?
a. | Headphone output | c. | Microphone or line input | b. | Mute | d. | PCI or SDI |
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5.
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T4A05 What is the proper location for an external
SWR meter?
a. | In series with the feed line, between the transmitter
and antenna | c. | In parallel with the push-to-talk line and the
antenna | b. | In series with the station's
ground | d. | In series with the power supply cable, as close as possible to the
radio |
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6.
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T4A06 Which of the following connections
might be used between a voice transceiver and a computer for digital operation?
a. | Receive and transmit mode, status, and
location | c. | Receive audio, transmit audio, and push-to-talk
(PTT) | b. | Antenna and RF power | d. | NMEA GPS location
and DC power |
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7.
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T4A07 How is a computer's sound card used when
conducting digital communications?
a. | The sound card communicates between the computer CPU and
the video display | c. | The sound card provides audio to the
radio's microphone input and converts received audio to digital form | b. | The sound card records the audio frequency for video
display | d. | All of these choices are correct |
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8.
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T4A08 Which of the following conductors
provides the lowest impedance to RF signals?
a. | Round stranded wire | c. | Twisted-pair cable | b. | Round copper-clad
steel wire | d. | Flat strap |
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9.
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T4A09 Which of the following could you use to
cure distorted audio caused by RF current on the shield of a microphone cable?
a. | Band-pass filter | c. | Preamplifier | b. | Low-pass
niter | d. | Ferrite choke |
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10.
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T4A10 What is the source of a high-pitched whine
that varies with engine speed in a mobile transceiver's receive audio?
a. | The ignition system | c. | The electric fuel pump | b. | The
alternator | d. | Anti-lock braking system controllers |
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11.
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T4A11 Where should the negative return
connection of a mobile transceiver's power cable be connected?
a. | At the battery or engine block ground
strap | c. | To any metal part of the
vehicle | b. | At the antenna mount | d. | Through the
transceiver's mounting bracket |
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