Test Review Flashcards
What is an advantage of a wet style vacuum pump in a pneumatic deicing system?
More durable
What is required when using exhaust shroud heating systems
Co monitor in the cockpit
How is Freon measured into a system?
Weight
What must you do before servicing freon system that has leaked out completely
Must be Evacuated
What are the pump vanes made of in a dry pump pneumatic de-icing system
Carbon
What is the most common type of heater in single-engine light aircraft
Exhaust shroud
What color is Type I de-icing fluid
Orange
A hydrostatic test pressure checks a cylinder to what pressure
5-3
What two components divide the high side from low side in a vapor cycle air conditioning system
Compressor
expansion valve
What kind of ice is formed from small droplets of water, is light weight and is easily removed
Rime ice
What may be a result of a negative pressure situation
Structural damage
What freon system utilized quick disconnect type couplings for servicing
R134
How is an oxygen candle shut off
Not possible once ignited
What do you use to thaw a frozen engine compressor
Hot air
How is air moved through the air cycle primary heat exchanger when on the ground
Fan
What engages and disengages a freon compressor from turning
Electromagnetic clutch
How do you check if your turbine engine compressor is frozen
Manually try to spin the engine fan
How is heat output regulated in a combustion heater system
Thermostat opens/closes fuel solenoid valve
The boiling point is dependent upon what
Pressure
Green deicing fluid
Type 4
What are low pressure oxygen lines made of
aluminum
Why is there a conductive neoprene outer layer on wing pneumatic de-icing boots
Dissipate static electricity
If all freon is lost, service the system to ___ PSI with freon and check for leaks
50
The maximum cabin differential pressure of an aircraft is dictated by what
Aircraft design limits
What kind of ice is formed from large drops of water and forms heavy sheets that are difficult to remove
Clear ice
What is one way to tell if a vapor cycle air conditioning system does not leak
Holds a vacuum
What is the job of the compressor in a vapor cycle air conditioning system
Turn low pressure freon vapor into high pressure freon vapor
What type of heat energy raises actual substance temperature
Sensible heat energy
What color are pressurized oxygen bottles used in aviation
Green
Conductive tapes, blankets and films are what type of anti-ice systems
Thermal electric
All pressurization systems have what feature for override
Manual mode
What can be an issue with pressurized cabin aircraft
Metal fatigue
What is the effect of low doses of carbon monoxide over long periods of time
Death
In what component of a vapor cycle air condition system does freon convert from a vapor to a liquid?
Condenser
Where is lubricating oil stored and serviced in a vapor cycle air conditioning system
Crank case compressor
What happens when you combine petroleum with oxygen
Creates heat
What is NOT a cause of icing on the evaporator external surface of a vapor cycle air conditioning system
Low freon
Soapy water can be used to detect from leaks….
True
What holds a pneumatic de-icing boot tight against the wing surface
Vacuum
A compound gauge on a manifold gauge set will measure what
Pressure and vacuum
What is a typically desirable rate-of-change for cabin pressure
300 to 500 ft/min
What mode of cabin pressurization maintains cabin pressure at a set differential psi
Constant differential pressure mode
Temperatures below what is required to change freon from a vapor to a liquid is called what
Subcooling
What regulates bleed air into the air cycle system
Pack valve
What uses the venturi effect to aid air volume into the cabin for pressurization
Jet pump multiplier
How do the ratios of gasses change with elevation
No change
What is a disadvantage of using a supercharger or turbocharger for cabin pressurization
Takes power from the engine
How does a chemical deice system work?
Lowers freeze point of water
In what type of aircraft would you find a wet type vacuum pump for de-icing
Older
When would a system evacuation not be required during servicing
If the system pressure never dropped below atmospheric pressure
