Auxiliary power units are used to supply __________ air for air conditioning and ventilation.
A. low pressure
B. high pressure
C. medium pressure
D. none
Answer:A
Auxiliary power units are used to supply __________ air for air conditioning and ventilation.
A. low pressure B. high pressure C. medium pressure D. none
Explanation: APUs supply compressed air for air conditioning. High pressure air is also called as compressed air.