Chapter 7, Aircraft Systems Part 2 Flashcards
Most small aircraft are equipped with either a 14 or ______ volt DC electrical system.
28
What is used to maintain a sufficient electrical charge in the battery during flight? Select all that apply.
Alternator & Generator
What is used to provide electrical power if the engine fails in flight?
Battery
What is used as a common point in an electrical system to connect main electrical power to the equipment using the power?
Bus bar
What instrument is used to monitor the performance of the aircraft’s electrical system and whether the battery is receiving an electrical charge?
Ammeter
What is aircraft normal generator voltage compared to battery voltage?
Generator voltage is higher than battery voltage
The hydraulic system on small aircraft is often used to operate which of the following systems?
Retractable landing gear
Constant speed propeller
Wheel brakes
True or false, on large airplanes, a hydraulic system is often used for flight control surfaces, wing flaps, spoilers, and other systems.
True
A basic hydraulic system consists of a reservoir, a pump, a filter to keep the fluid clean, a selector valve to control the direction of flow, a relief valve to relieve excess pressure, and other components to convert the hydraulic pressure into mechanical movement.
Actuator
An aircraft flown at a high altitude consumes more, or less fuel for a given airspeed than it does for the same speed at a lower altitude.
Less
When would it be required for an aircraft to be pressurized to allow the crew and passengers to breathe?
At high altitudes
Which sections of an aircraft are typically pressurized?
Cabin
Flight deck
Baggage
What type of aircraft can use air from the engine compressor section for pressurization?
Turbine
What does the cabin differential pressure gauge indicate the difference between?
Inside and outside pressure
What is another system provided for crew and passengers to breathe when there may not be enough air?
Oxygen system
What must never be used on oxygen system lines and components?
Oil/grease
What type of system is designed to prevent the formation of ice?
Anti-ice
What type of system is designed to remove ice once it has formed?
Deice
What parts of an aircraft typically have ice protection systems?
Pitot and static ports
Fuel tank vents
Propeller blades
Wing and tail leading edges
Windshields
What may also be installed on some aircraft to determine the extent of structural icing during night flights?
Wing inspection lights
How do wing leading edge deicing boots work?
They inflate to break off the ice
How do heated leading edges combat ice formation?
By preventing ice from forming
How do the weeping-wing systems combat ice formation?
They discharge a chemical that melt ice
One type of windshield anti-ice system directs a flow of ____________ to the windscreen. If used early enough, it prevents ice from building up on the windscreen.
Alcohol
Which ice protection system commonly causes large errors in the aircraft standby compass?
Windshield heat
True or false, propellers are immune to icing because their high-speed rotation prevents ice from forming.
False
How are pitot and static ports, fuel vents, and stall-warning sensors typically heated to prevent ice formation?
Electrically
