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Pascal's principle states that if...
pressure is applied at any point to a liquid in a closed system, that same pressure is felt throughout the system
pressure is applied at any point to any substance in a closed system, that same pressure is felt throughout the system
pressure is applied at any point to air in a closed system, that same pressure is felt throughout the system
pressure is applied at any point to a solid in a closed system, that same pressure is felt throughout the system
Select all of the advantages of hydraulics over other systems
minimal maintenance required
fluid is non-corrosive
Vegetable based hydraulic oil is predominantly __________ oil and is made from the __________ _____________ plant
castor , Ricinus communis
schellac , Atropa belladonna
castor , Papaver somniferum
camfer , Coriandrum sativum
camfer , Digitalis purpurea
What colour is mineral based hydraulic oil?
A disadvantage of synthetic based hydraulic fluid is it...
is prone to forming sludge
is unsuitable for higher pressures
it is highly flammable
The purpose of a check valve in a hydraulic system is to...
prevent the reverse flow of fluid
limit the amount of pressure in a system
initiate the movement of actuators in a system
direct hydraulic fluid for system operation
What is the main source of contamination in a hydraulic system?
In a pressurised hydraulic system, an unloading valve...
removes pressure from the pump when no service is required
provides a safety release, venting fluid overboard if an overpressure occurs in the system
converts pressure into mechanical energy
allows pressure to flow from a diaphragm type accumulator to a bladder type accumulator
are not suitable for precise control of moving parts
present an explosion hazard
are heavier than a comparable hydraulic system
cope with moving large or heavy surfaces better than hydraulic systems
Pressures stored in a pneumatic system can be up to...
The purpose of a bonding strip on an aircraft is to...
remove the static charge from an aircraft into the air
to keep all parts of the aircraft at the same charge
earth an aircraft prior to refuelling
prevent the build up of static electricity
On larger aircraft, what is used to detect the formation of ice?
What are the broad types of ice protection systems?
Select all that apply
Deicing boots should be used...
prior to any ice forming on the leading edges to prevent it from forming
only once the ice has reached 5mm in depth
whenever forecast icing conditions are likely to be encountered
only when the ice begins to affect airspeed
De-icing fluid works by...
lowering the freezing point of the ice
raising the freezing point of the ice
stripping the ice from the wings by forming a layer between the wing and the ice build up
dissolving the ice by chemically breaking up the water atom into Hydrogen and Oxygen
Which of these are types of fire detection mechanisms found in aircraft? Select all that apply
A continuous loop fire detection system...
has thermistor material contained within a wire
uses a thermocouple to respond to increased heating in an area
is only used in engines in aircraft due to their complexity
once activated, must be reset by engineers on the ground
The two types of fire extinguishing agents that may be used inside the cabin of an aircraft are...
Which statement best describes an Altitude Adjustable Oxygen system?
It allows the flow of Oxygen to be adjusted by the user
The regulator automatically adjusts the flow of Oxygen depending on the cabin altitude
The system is only used in the passenger cabin of airliners
The system is only used in the cockpit of airliners
What pressure is Oxygen typically stored at in a constant Oxygen flow system?