Radio Components

Question 1

Electrical current is measured in

Answer 1

Amperes

Question 2

Electrical power is measured in

Answer 2

Watts. What power

Question 3

What is the name of the flow of electrons in a circuit?

Answer 3

Current

Question 4

What is current that flows in one direction

Answer 4

Direct current (dc)

Question 5

What is the electrical term for the electromotive force (emf) that causes electron flow?

Answer 5

Voltage

Question 6

How much voltage does a typical transceiver require?

Answer 6

About 12 volts

Question 7

What is the name for a current that reverses direction on a regular basis

Answer 7

Alternating current (ac)

Question 8

What is the rate at which electrical energy is used?

Answer 8

Power (measured in watts)

Question 9

What is the unit of electromotive force?

Answer 9

The volt

Question 10

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

Answer 10

Frequency

Question 11

In which type of circuit is current the same in all circuits?

Answer 11

Series

Question 12

In which type of current is voltage the same across all components?

Answer 12

Parallel

Question 13

What is the ability to store energy in an electric field called?

Answer 13

Capacitance

Question 14

What is the unit of capacitance?

Answer 14

The farad

Question 15

What is the ability to store energy in a magnetic field called?

Answer 15

Inductance

Question 16

What is the basic unit of inductance

Answer 16

The Henry

Question 17

What is the unit of frequency

Answer 17

Hertz

Question 18

A radio wave is made up of what type of energy?

Answer 18

Electromagnetic

Question 19

What is the formula to calculate electrical power in a DC current?

Answer 19

P=E x I
Power = voltage times current

P goes on top

Question 20

What is impedance?

Answer 20

Opposition to AC current flow in a circuit

Question 21

What is the unit of impedance?

Answer 21

Ohms

Question 22

What is the proper abbreviation for megahertz

Answer 22

MHz

Question 23

Which term describes the rate at which electrical energy is used?

Answer 23

Power

Question 24

Which of the following HF bands have frequencies available for the tech class operator for RTTY and data transmissions

Answer 24

10 meter band only

Question 25

How can you make sure your station stays in compliance with RF safety regualtions

Answer 25

By reevaluation the station when an item of equipment is changed

Question 26

What does a dummy load consist of?

Answer 26

A non-inductive resistor and a heat sink.

Question 27

Which of the following is true of REMOTE control operation

Answer 27

All are correct: A CONTROL OPERATOR IS REQUIRED AT ALL TIMES The control operator indirectly manipulates the controls The control operator must be at the control point

Question 28

What mode is responsible for allowing over the horizon vhf and uhf communications to ranges of approximately 400 miles on a regular basis?

Answer 28

Tropospheric ducting

Question 29

What is an advantage of using a properly mounted 5/8 wavelength antenna for VHF or UHF mobile service?

Answer 29

It has a lower radiation angle and more gain than a 1/4 wavelength antenna.

Question 30

What happens to current at the junction of two components in parallel?

Answer 30

It divides between them dependent on the value of the components.

Question 31

What are the frequency limits of the UHF spectrum?

Answer 31

300 to 3000 MHz

Question 32

Which of the following could be used to remove power line noise or ignition noise?

Answer 32

Noise blanker. Noise noise noise, the word is in the answer.

Question 33

What is the ability to store energy in an electrical field called Also, what is it called in a magnetic field

Answer 33

Capacitance Inductance is in a magnetic field. My thought is that a capacitor only works until the energy runs out, that’s why it is an electrical field.