Air Tech - Support Systems

Pascal's principle states that if...

• 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 liquid 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

Advantages of hydraulics over other systems

Select all that apply.

• relatively lightweight

• efficient

• not flammable

• minimal maintenance required

• fluid is non-corrosive

What colour is mineral based hydraulic oil?

• red

• green

• purple

• blue

A disadvantage of synthetic based hydraulic fluid is it...

• is prone to forming sludge

• is unsuitable for higher pressures

• it is highly flammable

• it is hydroscopic (attracts moisture)

The purpose of a check valve in a hydraulic system is to...

• limit the amount of pressure in a system

• initiate the movement of actuators in a system

• prevent the reverse flow of fluid

• direct hydraulic fluid for system operation

What are the broad types of ice protection systems?

Select all that apply

• Mechanical

• Fluid

• Thermal

• Aerodynamic

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

• bi-metallic switch

• thermocouple

• capacitance measuring

• thermal imaging

A continuous loop fire detection system...

• once activated, must be reset by engineers on the ground

• uses a thermocouple to respond to increased heating in an area

• is only used in engines in aircraft due to their complexity

• has thermistor material contained within a wire

The two types of fire extinguishing agents that may be used inside the cabin of an aircraft are...

• carbon dioxide

• dry powder

• methyl bromide

• halon

• hydroflurocompounds