Facts

Question 1

What are the 7 advantages of EIDS and EFIS over analogue instruments?

Answer 1

1. Variable and varied
2. Coloured displays
3. Important data accentuated
4. Temporarily unimportant data suppressed
5. Fewer components needed
6. All EFIS monitors same type
7. Displays are interchangeable

Question 2

What does a CPU’s programming enable it to do?

Answer 2

• Arrive at the desired computations for output, input and storage. -Manipulate data in memory
• Perform mathematical and logical functions

Question 3

What type of memory is used when memory values don’t change? (E.g. dedicated systems)

Answer 3

ROM

Question 4

What type of memory is know as ‘volatile memory’?

Answer 4

RAM

Question 5

Which type of memory stores program steps and constant values?

Answer 5

ROM

Question 6

What makes it so content cannot usually be changed after manufacture of ROM?

Answer 6

A special masking technique adopted during programming

Question 7

Which type of memory stores data that changes during computer operation?

Answer 7

RAM

Question 8

What does PROM allow that ROM does not?

Answer 8

Existing programming to be altered

Question 9

How is data erased from the EPROM?

Answer 9

Exposing to ultraviolet light

Question 10

What is the advantage of EAROM over EPROM?

Answer 10

Each individual element of the memory can be changed without erasing all other elements

Question 11

What is the Inertial Reference System (IRS) an example of?

Answer 11

A Reference computer

Question 12

What 4 units utilise the IRS?

Answer 12

1. Auto throttle computer
2. Flight control computers
3. Pilot’s horizon situation indicators
4. Flight management computers

Question 13

What system is Laser gyro and acceleration based?

Answer 13

Inertial reference system (IRS)

Question 14

What is an example of an Informational computer?

Answer 14

Engine Indication and Crew Alerting System (EICAS)

Question 15

What type of computer collects, processes and formats data from various places for display?

Answer 15

Informational computer

Question 16

What do Storage/Monitor computers do very little of?

Answer 16

Signal processing

Question 17

What do Storage/Monitor computers do mainly?

Answer 17

Monitor and store data for later retrieval (to be used by other computers or crews)

Question 18

What does the data stored by EICAS pertain to?

Answer 18

Engine abnormalities during flight

Question 19

What is an example of a controlling computer?

Answer 19

Flap/Slat Electronic Unit (FSEU)

Question 20

What are 3 of the units that the FSEU takes input from

Answer 20

1. Flap lever
2. Flap/Slat position Module
3. Proximity Switch electronics unit

Question 21

When will the FSEU allow flap extension?

Answer 21

When airspeed is within allowable parameters

Question 22

What type of computer displays information and manipulates it depending on operator input?

Answer 22

Interactive computer?

Question 23

What is an example of an interactive computer and what do the crew use to interface with it?

Answer 23

Flight Management Computer (FMC)

Control Display Unit (CDU)

Question 24

What does a FMC calculate?

Answer 24

Optimal cost profiles for climb, cruise and decent

Question 25

What type of device was implemented in electronic circuit boards in 1979 and led to a 3-4 times higher unserviceability rate?

Answer 25

Electrostatic Sensitive Devices (ESD)