T4C: How radio works: receivers, transmitters, transceivers, amplifiers, power supplies, types of batteries, service life
T4C01:
What is used to convert radio signals into sounds we can hear?
Receiver
Transmitter
Microphone
Antenna
T4C02:
What is used to convert sounds from our voice into radio signals?
Transmitter
Receiver
Speaker
Antenna
T4C03:
What two devices are combined into one unit in a transceiver?
Receiver, transmitter
Receiver, transformer
Receiver, transistor
Transmitter, deceiver
T4C04:
What device is used to convert the alternating current from a wall outlet into low-voltage direct current?
Power Supply
Inverter
Compressor
Demodulator
T4C05:
What device is used to increase the output of a 10 watt radio to 100 watts?
Amplifier
Power supply
Antenna
Attenuator
T4C06:
Which of the battery types listed below offers the longest life when used with a hand-held radio, assuming each battery is the same physical size?
Lithium-ion
Lead-acid
Alkaline
Nickel-cadmium
T4C07:
What is the nominal voltage per cell of a fully charged nickel-cadmium battery?
1.2 volts
1.0 volts
1.5 volts
2.2 volts
T4C08:
What battery type on this list is not designed to be re-charged?
Carbon-zinc
Nickel-cadmium
Lead-acid
Lithium-ion
T4C09:
What is required to keep rechargeable batteries in good condition and ready for emergencies?
All of these answers are correct
They must be inspected for physical damage and replaced if necessary
They should be stored in a cool and dry location
They must be given a maintenance recharge at least every 6 months
T4C10:
What is the best way to get the most amount of energy from a battery?
Draw current from the battery at the slowest rate needed
Draw current from the battery as rapidly as possible
Reverse the leads when the battery reaches the 1/2 charge level
Charge the battery as frequently as possible
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● = Review
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● = Incorrect answer
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