11.16

Question 1

Is the anti icing on an aircraft’s trailing edge supplied from low, medium or high pressure ?

Answer 1

Low pressure

Question 2

What pressure does medium pressure systems operate at ?

Answer 2

50-150

Question 3

What pressure does high pressure systems operate at ?

Answer 3

1000-3000 psi

Question 4

When is LP and IP used ?

Answer 4

Take-off, climb, cruise

Question 5

When is HP used ?

Answer 5

Low-speed flight, decent

Question 6

Whats the 3 groups of compressors ?

Answer 6

Positive compressors
Multi-stage compressor
Centrifugal compressor

Question 7

What can only be plugged to common bleed duct ?

Answer 7

APU

Question 8

Whats the two ways a APU supplies pneumatic pressure to the aircraft ?

Answer 8

Bleeding it from compressor

Air from turbine supplied with a load compressor

Question 9

Whats the two types of positive displacement vacuum pump ?

Answer 9

Wet pump - lubricated from engine oil system

Dry pump - self-lubricated so there is no need for oil

Answer 10

Need