11.5 Instructor Questions

Question 1

What is the model for air pressure at sea level known as and what is its value?

Answer 1

A. (ISA) international standard pressure
B. 1013.25 hPa 15 degrees C

Question 2

What does the Altimeter measure?

Answer 2

Barometric height

Question 3

What is static pressure at sea level called?

Answer 3

QNH

Question 4

What happens to static pressure as altitude increases?

Answer 4

It decreases

Question 5

With aneroid bellows meter what is significant about small pressure changes at low level compared to high level?

Answer 5

It is less accurate a radio altimeter is used instead

Question 6

What is dynamic pressure?

Answer 6

Total pressure - static pressure

Question 7

In a pneumatic airspeed indicator what is the movement of bellows proportional to?

Answer 7

Changes in pressure

Question 8

How does total pressure vary with speed?

Answer 8

Higher speed means higher total pressure lower speed means lower total pressure

Question 9

What are the two names used for the temperature defined as, the temperature of the undisturbed air around the aircraft?

Answer 9

-static air temperature
-outside air temperature

Question 10

What is the usual temperature indicated used in flight?

Answer 10

Total air temperature

Question 11

Which temperature cannot be measured directly and must be calculated by the air data computer (ADC)?

Answer 11

Static temperature

Question 12

With the temperature calculation used for static air temperature what effect must be taken into consideration for the correct figure to be calculated?

Answer 12

Ram air rise

Question 13

What does a vertical speed indicator show?

Answer 13

Climb or descent in feet per minute

Question 14

In a vertical speed indicator what pressure is used?

Answer 14

Static pressure

Question 15

How is static pressure connected to a sealed case?

Answer 15

Calibrated metering unit

Question 16

Where are static ports located?

Answer 16

In smooth air or out of relative airflow towards the front of the aircraft

Question 17

What protective measures must be carried out with static ports?

Answer 17

Kept clean and dry

Question 18

What is the difference between measured static and real pressure called?

Answer 18

Static source error

Question 19

What does static source error depend on?

Answer 19

-fuselage shape
-airspeed
-flap/ landing gear position
-angle of attack

Question 20

What condition influences measured static?

Answer 20

Side slip

Question 21

How is side slips effect on static pressure compensated for?

Answer 21

Cross porting between the static ports on opposing sides

Question 22

What is pitot pressure used for?

Answer 22

Air speed indicator

Question 23

Which direction does the pitot probe point?

Answer 23

In the flow of air

Question 24

What must you ensure about pitot probes leading edge?

Answer 24

That they are in good condition

Question 25

What is used to prevent water and foreign objects from entering the probe?

Answer 25

A baffle

Question 26

How is ice prevented from forming and blocking the probe?

Answer 26

It is heated

Question 27

What must be fitted on the ground for pitot probes?

Answer 27

Blanking caps

Question 28

What do some pitot probes include?

Answer 28

Static ports