Chapter 2: Radio and Signals Fundamentals

Question 1

How many milliamperes is 1.5 amperes?

Answer 1

1.5A = 1,500 mA

Question 2

What is another way to specify a radio signal frequency of 1,500,000 hertz?

Answer 2

1,500,000Hz = 1,500kHz, 1.5MHz

Question 3

How many volts are equal to one kilovolt?

Answer 3

1kV=1000V

Question 4

How many volts are equal to one micro volt?

Answer 4

1microvolt=one one-millionth of a volt

Question 5

Which of the following is equivalent to 500mW?

Answer 5

500mW = 0.5W

Question 6

If an ammeter calibrated in amperes is used to measure a 3000-milliamperes current, what reading would it show?

Answer 6

3000mA=3A

Question 7

If a frequency display calibrated in MHz shows a reading of 3.525MHz, what would it show if it were calibrated in kHz?

Answer 7

3.525MHz = 3,525kHz

Question 8

How many microfarads are 1,000,000 picofarads?

Answer 8

1,000,000pF = 1 microfarad

Question 9

Which of the following frequencies is equal to 28,400kHz?

Answer 9

28,400kHz = 28.4MHz

Question 10

If a frequency display shows a reading of 2425MHz, what frequency is that in GHz

Answer 10

2425MHz = 2.425GHz

Question 11

What describes the number of times per second that an alternating current makes a complete cycle?

Answer 11

The number of cycles per second is the signals frequency, represented by “f”

Question 12

What are the frequency limits of the VHF spectrum?

Answer 12

30MHz-300MHz

Question 13

What are the frequency limits of the UHF spectrum?

Answer 13

300MHz to 3,000MHz (3GHz)

Question 14

What frequency range is referred to as HF?

Answer 14

3MHz - 30MHz

Question 15

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

Answer 15

Wavelength

Question 16

How fast does a radio wave travel through free space?

Answer 16

Speed of light (or 300,000,000 m/s)

Question 17

How does the wavelength of a radio wave relate to its frequency?

Answer 17

Inversely proportional. As frequency increases, wavelength decreases and vice-versa

Question 18

What is the formula for converting frequency to approximate wavelength in meters?

Answer 18

Wavelength in meters = 300 / f in MHz

Question 19

What property of radio waves is often used to identify the different frequency bands?

Answer 19

Referred to by their wavelengths (i.e. the meter band for 146.52MHz)

Question 20

What is the approximate velocity of a radio wave as it travels through free space?

Answer 20

300,000,000 meters per second

Question 21

What is a transceiver?

Answer 21

Equipment that combines the transmitter and receiver into a single piece of equipment

Question 22

What type of amateur station simultaneously retransmits the signal of another amateur station on a different channel or channels?

Answer 22

Repeaters