Pneumatic Systems Flashcards
What pressure is measured at the pito tube?
Total pressure.
What does pneumatic mean?
Air sensing or driving.
What air the three sources of compressed air for a gas turbine?
Bleed air from engines - compressed air from the APU - compressed air supplied by a ground power unit.
Bleed air passes through a high pressure shut off valve. What pressure does it reduce to?
100psi.
What does a ground power unit provide?
Bleed air.
What is an overheat detector called in a pneumatic system and how many are there per zone of the airframe?
2 loops
The main function of an air cycle machine is to cool the blank blank.
Cool the bleed air.
Engine bleed air used for air conditioning and pressurisation in turbo-jet aeroplanes is usually taken from the…
Compressor
The source of air to pressurise the reservoir of an aircraft’s hydraulic system is normally… blank from the compressor
Bleed air
In a typical bootstrap cooling system, the supply air is in what order? (Secondary exchanger / compressed / expansion turbine)
compressed, passed through a secondary heat exchanger, and then across an expansion turbine.
If the automatic control of an air conditioning system fails… it needs blank
Manual control
A commonly-used refrigerant in a Vapour Cycle Air Conditioning System is…
Freon
The air source for the vapour-cycle machine in a piston engine airplane is… the blank of a turbocharger
Compressor
Bleed air systems use a (1) _____, which normally stays (2) _____. (Non return valve / isolation valve) (CLOSED/OPEN)
isolation / closed
In comparison with the use of a conventional bleed air pneumatic system, an aircraft fitted with an electrical pneumatic system has… an increased blank
Range
