Week 5: Oxygen Systems

Question 1

What is the most common colour of an aviation breathing oxygen?

Answer 1

Green

Question 2

When servicing an oxygen system why is it important to use tools and wear clothing that is clean from petroleum products?

Answer 2

Pure oxygen supports combustion

Question 3

What indicates that the relief valve has been activated if an oxygen cylinder has been over pressurized?

Answer 3

Green blowout disc

Question 4

What is an indication of sever lack of oxygen at high altitudes?

Answer 4

Blue lips and fingernails(15000ft)

Question 5

What is a symptom of lack of proper oxygen?

Answer 5

Sleepiness

Question 6

What maintenance must be done on oxygen cylinders ever so many years to ensure they are still safe to use?

Answer 6

Hydrostatic testin

Question 7

What is most severe outcome of lack of proper oxygen?

Answer 7

Unconsciousness (25000ft)

Question 8

When are oxygen cylinders considered empty?

Answer 8

Below 50psi

Question 9

When servicing an oxygen bottle on an aircraft what should be referenced in order to fill the bottle to the proper pressure?

Answer 9

Service placard or the temperature compensation chart

Question 10

In general what pressure are gaseous oxygen cylinders rated to?

Answer 10

1800-1850psi

Question 11

What should be done if the gaseous oxygen system is left empty for a long period of time?

Answer 11

Purge system

Question 12

What should be used to check for leaks in a gaseous oxygen system?

Answer 12

Special leak testing solution

Question 13

Aircraft oxygen systems keep cabin air pressure at what regardless of altitude?

Answer 13

8000ft

Question 14

Small and medium aircraft designed without pressurization use what?

Answer 14

Supplemental Oxygen

Question 15

Newer cylinders are made of what?

Answer 15

Al shell wrapped with Kevlar

Question 16

Steel bottles are hydrostatically tested every how many years?

Answer 16

5 years

Question 17

Composite bottles are hydrostatically tested every how many years?

Answer 17

3 years

Question 18

Manufactured date and certification number are stamped where?

Answer 18

Cylinder neck

Question 19

What are the 2 groups of oxygen systems?

Answer 19

Continuous and Demand flow

Question 20

What are the 2 types of regulators for demand flow systems?

Answer 20

Diluted and Pressure

Question 21

High pressure lines are made of what and how many psi?

Answer 21

Steel, 450psi

Question 22

Low pressure lines are made of what and how many psi?

Answer 22

Aluminum, less than 450psi

Question 23

What can be used with a pressure relief valve or on its own to relieve the system of excess pressure due to overfilling or high temperature?

Answer 23

Frangible/rupture disc

Question 24

Oxygen valves should be open and filled how?

Answer 24

Slowly