T4A01
Electrical current is measured in which of the following units?
A. Volts
B. Watts
C. Ohms
D. Amperes
T4A02
Electrical Power is measured in which of the following units?
A. Volts
B. Watts
C. Ohms
D. Amperes
T4A03
What is the name for the flow of electrons in an electric circuit?
A. Voltage
B. Resistance
C. Capacitance
D. Current
T4A04
What is the name of a current that flows only in one direction?
A. An alternating current
B. A direct current
C. A normal current
D. A smooth current
T4A05
What is the standard unit of frequency?
A. The megacycle
B. The Hertz
C. One thousand cycles per second
D. The electromagnetic force
T4A06
How much voltage does an automobile battery usually supply?
A. About 12 volts
B. About 30 volts
C. About 120 volts
D. About 240 volts
T4A07
What is the basic unit of resistance?
A. The volt
B. The watt
C. The ampere
D. The ohm
T4A08
What is the name of a current that reverses direction on a regular basis?
A. An alternating current
B. A direct current
C. A circular current
D. A vertical current
T4A09
Which of the following is a good electrical conductor?
A. Glass
B. Wood
C. Copper
D. Rubber
T4A10
Which of the following is a good electrical insulator?
A. Copper
B. Glass
C. Aluminum
D. Mercury
T4A11
What is the term used to describe opposition to current flow in ordinary conductors such as wires?
A. Inductance
B. Resistance
C. Counter EMF
D. Magnetism
T4A12
What instrument is used to measure the flow of current in an electrical circuit?
A. Frequency meter
B. SWR meter
C. Ammeter
D. Voltmeter
T4A13
What instrument is used to measure Electromotive Force (EMF) between two points such as the poles of a battery?
A. Magnetometer
B. Voltmeter
C. Ammeter
D. Ohmmeter
T4B01
What is the name for the distance a radio wave travels during one complete cycle?
A. Wave speed
B. Waveform
C. Wavelength
D. Wave spread
T4B02
What term describes the number of times that an alternating current flows back and forth per second?
A. Pulse rate
B. Speed
C. Wavelength
D. Frequency
T4B03
What does 60 hertz (Hz) mean?
A. 6000 cycles per second
B. 60 cycles per second
C. 6000 meters per second
D. 60 meters per second
T4B04
Electromagnetic waves that oscillate more than 20,000 times per second
as they travel through space are generally referred to as what?
A. Gravity waves
B. Sound waves
C. Radio waves
D. Gamma radiation
T4B05
How fast does a radio wave travel through space?
A. At the speed of light
B. At the speed of sound
C. Its speed is inversely proportional to its wavelength
D. Its speed increases as the frequency increases
T4B06
How does the wavelength of a radio wave relate to its frequency?
A. The wavelength gets longer as the frequency increases
B. The wavelength gets shorter as the frequency increases
C. There is no relationship between wavelength and frequency
D. The wavelength depends on the bandwidth of the signal
T4B07
What is the formula for converting frequency to wavelength in meters?
A. Wavelength in meters equals frequency in Hertz multiplied by 300
B. Wavelength in meters equals frequency in Hertz divided by 300
C. Wavelength in meters equals frequency in megahertz divided by 300
D. Wavelength in meters equals 300 divided by frequency in
megahertz
T4B08
What are sound waves in the range between 300 and 3000 Hertz called?
A. Test signals
B. Ultrasonic waves
C. Voice frequencies
D. Radio frequencies
T4B09
What property of a radio wave is often used to identify the different bands amateur radio operators use?
A. The physical length of the wave
B. The magnetic intensity of the wave
C. The time it takes for the wave to travel one mile
D. The voltage standing wave ratio of the wave
T4B10
What is the frequency range of the 2 meter band in the United States?
A. 144 to 148 MHz
B. 222 to 225 MHz
C. 420 to 450 MHz
D. 50 to 54 MHz
T4B11
What is the frequency range of the 6 meter band in the United States?
A. 144 to 148 MHz
B. 222 to 225 MHz
C. 420 to 450 MHz
D. 50 to 54 MHz
T4B12
What is the frequency range of the 70 centimeter band in the United States?
A. 144 to 148 MHz
B. 222 to 225 MHz
C. 420 to 450 MHz
D. 50 to 54 MHz
T4C01
What is used to convert radio signals into sounds we can hear?
A. Transmitter
B. Receiver
C. Microphone
D. Antenna
T4C02
What is used to convert sounds from our voice into radio signals?
A. Transmitter
B. Receiver
C. Speaker
D. Antenna
T4C03
What two devices are combined into one unit in a transceiver?
A. Receiver, transmitter
B. Receiver, transformer
C. Receiver, transistor
D. Transmitter, deceiver
T4C04
What device is used to convert the alternating current from a wall outlet into low-voltage direct current?
A. Inverter
B. Compressor
C. Power Supply
D. Demodulator
T4C05
What device is used to increase the output of a 10 watt radio to 100 watts?
A. Amplifier
B. Power supply
C. Antenna
D. 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?
A. Lead-acid
B. Alkaline
C. Nickel-cadmium
D. Lithium-ion
T4C07
What is the nominal voltage per cell of a fully charged nickel-cadmium battery?
A. 1.0 volts
B. 1.2 volts
C. 1.5 volts
D. 2.2 volts
T4C08
What battery type on this list is not designed to be re-charged?
A. Nickel-cadmium
B. Carbon-zinc
C. Lead-acid
D. Lithium-ion
T4C09
What is required to keep rechargeable batteries in good condition and ready for emergencies?
A. They must be inspected for physical damage and replaced if necessary
B. They should be stored in a cool and dry location
C. They must be given a maintenance recharge at least every 6 months
D. All of these answers are correct
T4C10
What is the best way to get the most amount of energy from a battery?
A. Draw current from the battery as rapidly as possible
B. Draw current from the battery at the slowest rate needed
C. Reverse the leads when the battery reaches the 1/2 charge level
D. Charge the battery as frequently as possible
T4D01
What formula is used to calculate current in a circuit?
A. Current (I) equals voltage (E) multiplied by resistance (R)
B. Current (I) equals voltage (E) divided by resistance (R)
C. Current (I) equals voltage (E) added to resistance (R)
D. Current (I) equals voltage (E) minus resistance (R)
T4D02
What formula is used to calculate voltage in a circuit?
A. Voltage (E) equals current (I) multiplied by resistance (R)
B. Voltage (E) equals current (I) divided by resistance (R)
C. Voltage (E) equals current (I) added to resistance (R)
D. Voltage (E) equals current (I) minus resistance (R)
T4D03
What formula is used to calculate resistance in a circuit?
A. Resistance (R) equals voltage (E) multiplied by current (I)
B. Resistance (R) equals voltage (E) divided by current (I)
C. Resistance (R) equals voltage (E) added to current (I)
D. Resistance (R) equals voltage (E) minus current (I)
T4D04
What is the resistance of a circuit when a current of 3 amperes flows through a resistor connected to 90 volts?
A. 3 ohms
B. 30 ohms
C. 93 ohms
D. 270 ohms
T4D05
What is the resistance in a circuit where the applied voltage is 12 volts and the current flow is 1.5 amperes?
A. 18 ohms
B. 0.125 ohms
C. 8 ohms
D. 13.5 ohms
T4D06
What is the current flow in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?
A. 9600 amperes
B. 200 amperes
C. 0.667 amperes
D. 1.5 amperes
T4D07
What is the voltage across the resistor if a current of 0.5 amperes flows through a 2 ohm resistor?
A. 1 volt
B. 0.25 volts
C. 2.5 volts
D. 1.5 volts
T4D08
What is the voltage across the resistor if a current of 1 ampere flows through a 10 ohm resistor?
A. 10 volts
B. 1 volt
C. 11 volts
D. 9 volts
T4D09
What is the voltage across the resistor if a current of 2 amperes flows through a 10 ohm resistor?
A. 20 volts
B. 0.2 volts
C. 12 volts
D. 8 volts
T4D10
What is the current flowing through a 100 ohm resistor connected across 200 volts?
A. 20,000 amperes
B. 0.5 amperes
C. 2 amperes
D. 100 amperes
T4D11
What is the current flowing through a 24 ohm resistor connected across 240 volts?
A. 24,000 amperes
B. 0.1 amperes
C. 10 amperes
D. 216 amperes
T4E01
What unit is used to describe electrical power?
A. Ohm
B. Farad
C. Volt
D. Watt
T4E02
What is the formula used to calculate electrical power in a DC circuit?
A. Power (P) equals voltage (E) multiplied by current (I)
B. Power (P) equals voltage (E) divided by current (I)
C. Power (P) equals voltage (E) minus current (I)
D. Power (P) equals voltage (E) plus current (I)
T4E03
How much power is represented by a voltage of 13.8 volts DC and a current of 10 amperes?
A. 138 watts
B. 0.7 watts
C. 23.8 watts
D. 3.8 watts
T4E04
How much power is being used in a circuit when the voltage is 120 volts DC and the current is 2.5 amperes?
A. 1440 watts
B. 300 watts
C. 48 watts
D. 30 watts
T4E05
How can you determine how many watts are being drawn by your transceiver when you are transmitting?
A. Measure the DC voltage and divide it by 60 Hz
B. Check the fuse in the power leads to see what size it is
C. Look in the Radio Amateur's Handbook
D. Measure the DC voltage at the transceiver and multiply by the
current drawn when you transmit
T4E06
How many amperes are flowing in a circuit when the applied voltage is 120 volts DC and the load is 1200 watts?
A. 20 amperes
B. 10 amperes
C. 120 amperes
D. 5 amperes
T4E07
How many milliamperes is the same as 1.5 amperes?
A. 15 milliamperes
B. 150 milliamperes
C. 1500 milliamperes
D. 15000 milliamperes
T4E08
What is another way to specify the frequency of a radio signal that is oscillating at 1,500,000 Hertz?
A. 1500 kHz
B. 1500 MHz
C. 15 GHz
D. 150 kHz
T4E09
How many volts are equal to one kilovolt?
A. one one-thousandth of a volt
B. one hundred volts
C. one thousand volts
D. one million volts
T4E10
How many volts are equal to one microvolt?
A. one one-millionth of a volt
B. one million volts
C. one thousand kilovolts
D. one one-thousandth of a volt
T4E11
How many watts does a hand-held transceiver put out if the output power is 500 milliwatts?
A. 0.02 watts
B. 0.5 watts
C. 5 watts
D. 50 watts