What component in the water supply system prevents pressure from flowing backward?

(a)  

What biological issue is mitigated by regularly emptying and refilling the aircraft's water system?

(a)  

What is an alternative term for the wastewater originating from aircraft lavatories?

(a)  

What mechanical device generates the necessary suction for vacuum-based toilet systems at lower altitudes (below 16,000 feet)?

(a)  

If the turn and bank selector valve is set to main, which instrument's suction will be indicated on the vacuum gauge?

(a)  

What general term describes the use of high-pressure nitrogen to move hydraulic fluid for emergency power?

(a)  

What designation is given to the pneumatic system that usually draws compressed air from the engine and operates within a pressure range of 35 to 150 psi?

(a)  

What is the standard color of the flashing beacon lights used as an anti-collision measure on aircraft?

(a)  

In the event of a primary power loss on an aircraft, where does the emergency lighting system typically draw its power from?

(a)  

What component do landing lights use to direct light at an angle for maximum illumination range?

(a)  

What method does the Onboard Oxygen Generating System (OBOGS) use to extract oxygen from air for aviation and ground applications?

(a)  

What assembly does the liquid oxygen pass through to convert it from liquid to gas?

(a)  

Vacuum systems are commonly used in aircraft to power gyroscopic instruments. Name at least two instruments.

(a)  

In high-pressure pneumatic systems, what do we utilize to charge high-pressure bottles?

(a)