Met/instruments

Question 1

What is pressure alt?

Answer 1

ISA height above the 1013 datum.

Question 2

What is barometric pressure error?

Answer 2

Effect of flying in an area with different sea level pressure.

Question 3

What is density?

Answer 3

Mass per unit volume

Question 4

What are the main influences on air density?

Answer 4

1. Temp
2. Pressure
3. Humidity

Question 5

What pressure is used to calculate airspeed?

Answer 5

Dynamic pressure

Question 6

Describe TAS

Answer 6

TAS is the actual speed of an ac through the air mass it is flying in.

Question 7

What effects TAS?

Answer 7

Air density. The higher the air density, the lower the TAS

Question 8

How does temp effect the local speed of sound (LSS)?

Answer 8

As temp decreases, the LSS decreases

Question 9

How do you calculate Mach no.?

Answer 9

TAS/LSS

Question 10

What happens to your Mach no. if you climb at a constant CAS or IAS?

Answer 10

Mach no will increase

Question 11

If 2 ac are flying at diff levels at the same Mach no which ac has the higher TAS?

Answer 11

The lower ac as temperature will be higher

Question 12

What does a pitot tube measure?

Answer 12

Total pressure

Question 13

How do the instruments produce dynamic pressure?

Answer 13

Dynamics pressure = total pressure - static pressure

Question 14

What pressure does an ASI use?

Answer 14

Dynamic pressure

Question 15

What are the two gyroscopic properties?

Answer 15

1. Rigidity

2. Precession

Question 16

What does the rigidity property allow?

Answer 16

The gyro to remain stable in space while the ac moves around it

Question 17

What will a change in direction or alt do to the gyro?

Answer 17

Precess the gyro

Question 18

What is the error in gyros?

Answer 18

Wander

Question 19

What is true heading a product of?

Answer 19

True hdg = mag hdg + Easterly variation.

Question 20

What is a fail passive AL system?

Answer 20

In the event of a single control Chanel failure, there is no significant out of trim condition or deviation from the flight path or attitude

Question 21

What is a fail operational system

Answer 21

3 computers. In the event of single failure, the remaining computers will continued to provide the capability to land

Question 22

What does an anti skid system protect against?

Answer 22

1. Locked wheel
2. Wheel skid/slip
3. Aqua planing
4. Touchdown - locked wheels on landing

Question 23

How is cabin press controlled?

Answer 23

With the outflow valves

Question 24

What is the greatest contaminant of fuel?

Answer 24

Water

Question 25

What steps can be taken against fuel contamination?

Answer 25

1. Water drains in the fuel tanks
2. Fuel heaters
3. Atmospheric exclusion in the fuel tanks

Question 26

What do fuel heaters do?

Answer 26

Evaporate water prior to delivery to the engine

Question 27

Why is fuel not measured in terms of volume?

Answer 27

Volume changes with temp.