Anti Ice
What are the two main types of ice encountered during flight?
Clear ice and rime ice
What is the typical location of potable water storage tanks in an aircraft?
Under the passenger floor
What is the primary component of Earth's atmosphere?
Nitrogen
What is the primary reason for maintaining cabin pressure at approximately 8,000 feet during flight?
To ensure adequate oxygen for passengers
What is the primary purpose of heating systems in aircraft?
To ensure passenger comfort and safety
Which component is typically heated to prevent ice formation on air data probes?
Pitot tube
What is the capacity of the water heater in a potable water system?
3 pints (1.7 liters)
Which condition is characterized by a deficiency of oxygen in the blood?
Hypoxia
What critical function does cabin differential pressure serve?
It is the cabin pressure minus ambient pressure
How do pressurized aircraft typically heat the cabin?
By using bleed air from engines
What is holdover time (HOT)?
The estimated time that deicing fluid prevents frost formation
At what temperature does the overheat switch open to stop power to the heating elements?
189°F
How does hyperventilation affect the body?
It reduces carbon dioxide levels in the blood.
What happens to the pressurization system when an aircraft reaches its maximum altitude?
It switches to constant differential mode
What is a significant drawback of electric heating systems in aircraft?
They require significant generator output
In the electrothermal propeller deice system, what triggers the automatic heating sequence?
A preset timer
What system prevents freezing in areas where freezing is an issue?
Ribbon heaters
What type of fittings is commonly used for oxygen system tubing?
Flared tube connections
Why are superchargers and turbochargers used in reciprocating aircraft?
To increase induction system pressure
What type of air is used in the combustion process of combustion heaters?
Ambient air from outside the aircraft
How does the Distance Measuring Equipment (DME) aid in ice control systems?
It provides accurate altitude information
What is used to indicate the water content in the tanks to the cabin crew?
Float with a magnet to activate reed switches
At what altitude does the oxygen pressure in the lungs begin to drop significantly?
7,000 feet
What is a negative pressure relief valve designed to do?
Allow ambient air to enter the cabin if pressure drops
What is a common modification to improve heat transfer in exhaust systems?
Using a muffler with welded studs