Aircraft Pressurization

Question 1

What is the atmospheric pressure at sea level

Answer 1

14.7 psi

Question 2

What is the barometric pressure of mercury at sea level

Answer 2

29.92 inches

Question 3

As altitude increases temperature _______

Answer 3

Decreases

Question 4

How many requirements are needed for aircraft pressurization

Answer 4

3

Question 5

What are the three requirements for aircraft pressurization

Answer 5

1. A sealed aircraft cabin
2. a source of temperature controlled compressed air
3. A method of controlling cabin pressure

Question 6

Used to express cabin pressure in terms of equivalent altitude above sea level. Ex. Instead of saying 10.92psi you say 8000 feet

Answer 6

Cabin altitude

Question 7

The difference between the pressure inside the cabin and the pressure outside the cabin

Answer 7

Cabin differential pressure

Question 8

The rate change of air pressure inside the cabin expressed in feet per minute

Answer 8

Cabin rate of climb

Question 9

A condition where outside air pressure is greater than the pressure inside the cabin

Answer 9

Negative pressure

Question 10

How many types of leaks can occur in pressurized aircraft

Answer 10

2

Question 11

What are the types of leaks that can occur in pressurized aircraft

Answer 11

Controlled leakage

Uncontrolled leakage

Question 12

Air that is allowed to escape through a valve to regulate pressure in the aircraft

Answer 12

Controlled leakage

Question 13

Air leaks around hatches,doors, and drains

Answer 13

Uncontrolled leakage

Question 14

What is used around metal seams windows and similar structures to create a permanent seal

Answer 14

Sealant

Question 15

A large volume of __________ is needed to pressurize and maintain a comfortable environment during high altitude flights

Answer 15

Compressed air

Question 16

Controlling the outflow of air is accomplished by

Answer 16

1. Automatic pressure controlling

2. Manual pressure controlling

Question 17

Regulates cabin pressure by controlling the airflow out of the cabin

Answer 17

Outflow valve

Question 18

Controls the position of the outflow valve to maintain cabin pressure

Answer 18

Cabin pressure controller

Question 19

manually controls cabin pressurization

Answer 19

Manual pressurization switch

Question 20

Indicates rate of change in cabin altitude

Answer 20

Cabin rate of climb indicator

Question 21

A pressure relief valve set to open at a predetermined pressure differential

Answer 21

Safety valve

Question 22

Controls the position of the outflow valve

Answer 22

Pressure controller

Question 23

Allows flight crews to set the maximum rate the cabin altitude can change

Answer 23

Rate control knob

Question 24

Used to set desired automatic pressurization

Answer 24

Cabin altitude selector knob

Question 25

Displays the maximum altitude the aircraft can fly and maintain the selected cabin pressure

Answer 25

Altitude at maximum differential window

Question 26

If the safety valve senses cabin differential pressure it performs 2 automatic functions

Answer 26

1. Relief of over pressurization

2. Relief of negative pressure

Question 27

A two position electrical switch with emergency and normal positions

Answer 27

Emergency depressurization switch

Question 28

In the event of an emergency the emergency depressurization switch can be actuated and perform what three things

Answer 28

1. Outflow valve will open
2. Safety valve will open
3. Air conditioning will shut down

Question 29

In the event of pressurization problems and the emergency depressurization switch fails what can be pulled to activate the emergency depressurization door

Answer 29

Emergency t handle in the cockpit

Question 30

When activating the emergency depressurization door, ________ is not automatically shut down and needs to be shut down manually

Answer 30

Air conditioning units

Question 31

Cabin pressurization systems must be capable of altitudes of

Answer 31

8000 feet or lower

Question 32

Aircraft pressurization systems must be designed to prevent ______ that can cause injury to the crew

Answer 32

Rapid change of cabin pressure