G4E: HF mobile radio installations; emergency and battery powered operation
G4E01:
Which of the following emission types are permissible while operating HF mobile?
All of these choices are correct
CW
SSB
FM
G4E02:
What is alternator whine?
A tone or buzz in transmitted or received audio that varies with engine speed
A DC emission from the alternator
A constant pitched tone or buzz in transmitted or received audio that occurs whenever the ignition key is in the on position
A mechanical sound from the alternator indicating current overload
G4E03:
Which of the following power connections would be the best for a 100-watt HF mobile installation?
A direct, fused connection to the battery using heavy gauge wire
A direct, fused connection to the alternator or generator using heavy gauge wire
A direct, fused connection to the battery using resistor wire
A direct, fused connection to the alternator or generator using resistor wire
G4E04:
Why is it best NOT to draw the DC power for a 100-watt HF transceiver from an automobile's cigarette lighter socket?
The socket's wiring may be inadequate for the current being drawn by the transceiver
The socket is not wired with an RF-shielded power cable
The DC polarity of the socket is reversed from the polarity of modern HF transceivers
The power from the socket is never adequately filtered for HF transceiver operation
G4E05:
Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75 meter band?
The HF mobile antenna system
"Picket Fencing" signal variation
The wire gauge of the DC power line to the transceiver
FCC rules limiting mobile output power on the 75 meter band
G4E06:
Which of the following is true of an emergency generator installation?
The generator should be located in a well ventilated area
The generator should be insulated from ground
Fuel should be stored near the generator for rapid refueling in case of an emergency
All of these choices are correct
G4E07:
When might a lead-acid storage battery give off explosive hydrogen gas?
When being charged
When stored for long periods of time
When being discharged
When not placed on a level surface
G4E08:
What is the name of the process by which sunlight is changed directly into electricity?
Photovoltaic conversion
Photon emission
Photosynthesis
Photon decomposition
G4E09:
What is the approximate open-circuit voltage from a modern, well illuminated photovoltaic cell?
0.5 VDC
0.02 VDC
0.2 VDC
1.38 VDC
G4E10:
Which of these materials is used as the active element of a solar cell?
Doped Silicon
Nickel Hydride
Doped Platinum
Aluminum nitride
G4E11:
Which of the following is a disadvantage to using wind power as the primary source of power for an emergency station?
A large energy storage system is needed to supply power when the wind is not blowing
The conversion efficiency from mechanical energy to electrical energy is less that 2 percent
The voltage and current ratings of such systems are not compatible with amateur equipment
All of these choices are correct
G4E12:
Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?
Danger of carbon monoxide poisoning
Danger of engine over torque
Lack of oxygen for adequate combustion
Lack of nitrogen for adequate combustion
G4E13:
Why would it be unwise to power your station by back feeding the output of a gasoline generator into your house wiring by connecting the generator through an AC wall outlet?
It might present a hazard for electric company workers
It is prone to RF interference
It may disconnect your RF ground
None of the above; this is an excellent expedient
|
Color key:
|
|
● = Unseen
|
|
● = Weak
|
|
● = Review
|
|
● = Learned
|
|
● = Incorrect answer
|
