Avionics

Question 1

Aviation Electronics are referred to as?

Answer 1

Avionics

Question 2

Why was radio communication needed?

Answer 2

So aircraft could complete flights over long distances.

Question 3

What was the drawback of vacuum tube diodes?

Answer 3

Required lots of power, generated lots of heat, and very fragile.

Question 4

When are N-P-N transistors turned on?

Answer 4

When a positive voltage, compared to the emitter, is put on the base.

Question 5

When is a P-N-P transistor turned on?

Answer 5

When a negative voltage, compared to the emitter, is put on the base.

Question 6

What happens to the current that flows in the collector/emitter?

Answer 6

It will be proportional to the change in the base. It will usually be multiples of the base. This means they can amplify a signal.

Question 7

What makes a good insulator or conductor?

Answer 7

The numbers of electrons on the valence shelf. Less electrons good conductor, more electrons good insulator.

Question 8

What is the flow of electrons through a diode?

Answer 8

Electron vs conventional.

Question 9

What is RAM?

Answer 9

Random access memory that is used for temporary storage in a computer system.

Question 10

What is ROM?

Answer 10

Read-only memory is a type of nonvolatile memory in a computer that is not lost when power to the computer is lost.

Question 11

What is NVRAM?

Answer 11

Non-volatile random access memory is random access memory that is retained, even when power is lost.

Question 12

What is a logic gate?

Answer 12

Provide a set output signal based on one or more input signals.

Question 13

What is the wave length of low frequency?

Answer 13

Long lengths.

Question 13

What is the wave length of high frequency?

Answer 13

Short waves

Question 14

What are ground waves?

Answer 14

-Travel close to the ground
-VLF to MF waves
-AM broadcast, NDBs and ADFs

Question 15

What are sky waves?

Answer 15

-Bounce off the Ionosphere
-HF waves

Question 16

What are space waves?

Answer 16

-Line of sight
-VHF to EHF
-Lots of uses in aviation.

Question 17

What is the purpose of single side band?

Answer 17

Takes up less space.

Question 18

What is the function of VHF?

Answer 18

The primary communication method for US civilian aircraft. It is AM.

Question 19

What is HF comm?

Answer 19

Single side band is used, mostly in Europe.

Question 20

Describe a loop antenna.

Answer 20

It is highly direction sensitive. If the loop is perpendicular, minimum reception. If the loop is parallel to the direction of travel, maximum reception.

Question 21

What it the output of a AND gate?

Answer 21

0+0=0
0+1=0
1+0=0
1+1=1

Question 22

What are the outputs of a OR gate?

Answer 22

0+0=0
0+1=1
1+0=1
1+1=1

Question 23

What are the outputs of a XOR gate?

Answer 23

0+0=0
0+1=1
1+0=1
1+1=0