AVIA 340 ACTUAL FINALS QUESTIONS AND
ANSWERS SET A+
✔✔Cabin pressure is controlled by modulating the exhaust of the cabin air via
Pressurization pumps
Outflow valves
Maximum differential valves
Rate controller - ✔✔Outflow valves
✔✔Dump valves allow pilots to manually vent the cabin pressurization
True
False - ✔✔True
✔✔Above FL350, ____________regulators continually supply 100% O2 under positive
pressure in the event of lost cabin pressure.
Pressure demand
Diluter demand
100% free flow
Continuous flow - ✔✔Pressure demand
✔✔The air that enters an aircraft pressure vessel (the cabin) is environmental bleed air
from the engine.
True
False - ✔✔True
✔✔What is the main measure of a pressurization system's efficiency?
Maximum cabin altitude attainable with the outflow valves open.
Maximum differential pressure.
Maximum cabin altitude attainable with the outflow valves closed.
Maximum altitude reached by the aircraft. - ✔✔Maximum differential pressure.
✔✔What is the purpose of positive pressure relief valves in the pressurization system?
To prevent overpressurization in case of controller or outflow valve malfunction.
, To manually vent cabin pressurization in emergencies.
To ensure the cabin pressure never falls below ambient pressure.
To control the cabin rate of climb during descent. - ✔✔To prevent overpressurization in
case of controller or outflow valve malfunction.
✔✔__________ refers to the small venturi-type ports which are used to draw fuel into
the collection line
Fuel Control Unit
Low pressure fuel pump
High pressure fuel pump
Motive flow - ✔✔Motive flow
✔✔A ___________ is simply a separated segment of a larger fuel tank, usually located
close to the engine.
crossfeed valve
collector bay
fuel control unit (FCU)
low pressure fuel pump - ✔✔collector bay
✔✔The electric standby boost pump functions as a backup pump for the high pressure
engine driven fuel pump and can keep the engine running if the high pressure engine
driven fuel pump fails.
True
False - ✔✔False
✔✔Environmental air (bottom side of the diagram) is used for such applications as
deice boots, door seals, and gyroscopic instruments
deice boots, pressurization, heating, and gyroscopic instruments
cooling, heating, and pressurization
all of the above - ✔✔cooling, heating, and pressurization
✔✔What is the basic operating principle of air and vapor cycle machines?
Compression and expansion have no effect on temperature.
Compression cools gas, expansion heats it.
Both compression and expansion heat gas.
Compression heats gas, expansion cools it. - ✔✔Compression heats gas, expansion
cools it.
✔✔What is the function of a fuel control unit (FCU)?
To warm the fuel and prevent crystallization.
To measure fuel quantity in pounds.
To deliver fuel to the engine based on various inputs.
To manage fuel vents. - ✔✔To deliver fuel to the engine based on various inputs.
ANSWERS SET A+
✔✔Cabin pressure is controlled by modulating the exhaust of the cabin air via
Pressurization pumps
Outflow valves
Maximum differential valves
Rate controller - ✔✔Outflow valves
✔✔Dump valves allow pilots to manually vent the cabin pressurization
True
False - ✔✔True
✔✔Above FL350, ____________regulators continually supply 100% O2 under positive
pressure in the event of lost cabin pressure.
Pressure demand
Diluter demand
100% free flow
Continuous flow - ✔✔Pressure demand
✔✔The air that enters an aircraft pressure vessel (the cabin) is environmental bleed air
from the engine.
True
False - ✔✔True
✔✔What is the main measure of a pressurization system's efficiency?
Maximum cabin altitude attainable with the outflow valves open.
Maximum differential pressure.
Maximum cabin altitude attainable with the outflow valves closed.
Maximum altitude reached by the aircraft. - ✔✔Maximum differential pressure.
✔✔What is the purpose of positive pressure relief valves in the pressurization system?
To prevent overpressurization in case of controller or outflow valve malfunction.
, To manually vent cabin pressurization in emergencies.
To ensure the cabin pressure never falls below ambient pressure.
To control the cabin rate of climb during descent. - ✔✔To prevent overpressurization in
case of controller or outflow valve malfunction.
✔✔__________ refers to the small venturi-type ports which are used to draw fuel into
the collection line
Fuel Control Unit
Low pressure fuel pump
High pressure fuel pump
Motive flow - ✔✔Motive flow
✔✔A ___________ is simply a separated segment of a larger fuel tank, usually located
close to the engine.
crossfeed valve
collector bay
fuel control unit (FCU)
low pressure fuel pump - ✔✔collector bay
✔✔The electric standby boost pump functions as a backup pump for the high pressure
engine driven fuel pump and can keep the engine running if the high pressure engine
driven fuel pump fails.
True
False - ✔✔False
✔✔Environmental air (bottom side of the diagram) is used for such applications as
deice boots, door seals, and gyroscopic instruments
deice boots, pressurization, heating, and gyroscopic instruments
cooling, heating, and pressurization
all of the above - ✔✔cooling, heating, and pressurization
✔✔What is the basic operating principle of air and vapor cycle machines?
Compression and expansion have no effect on temperature.
Compression cools gas, expansion heats it.
Both compression and expansion heat gas.
Compression heats gas, expansion cools it. - ✔✔Compression heats gas, expansion
cools it.
✔✔What is the function of a fuel control unit (FCU)?
To warm the fuel and prevent crystallization.
To measure fuel quantity in pounds.
To deliver fuel to the engine based on various inputs.
To manage fuel vents. - ✔✔To deliver fuel to the engine based on various inputs.
