Cabin Pressurization

Question 1

Isobaric system

Answer 1

Aircraft pressurization maybe regulated by maintaining a constant cabin pressure as altitude increases

Question 2

Isobaric-differential system

Answer 2

Unpressurized until a preset cabin pressure is reached. Once reached the isobaric function of the system maintains a constant pressure within the cabin until a selected pressure differential is attained

Question 3

Advantages of pressurization systems

Answer 3

Reduced probability of decompression sickness and hypoxia. Reduced need for supplemental oxygen below 10,000 feet. Reduced expansion of G.I. trapped gas.
Controls Cabin temperature humidity and ventilation. Allows movement of crew and passengers. Protects the sinuses and middle ears from sudden pressure increases

Question 4

Disadvantages of a pressurization system

Answer 4

Decompression, increased aircraft weight and additional design engineering, decreased performance and payload, increased maintenance, control of cabin air contamination

Question 5

Types of decompression

Answer 5

Slow and rapid