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3 types of pneumatic systems |
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High pressure (1000-3300 psi) Medium pressure (35 - 150 psi) Low pressure (0-30 psi) |
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2 types of landing gear configurations? |
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Single disk Dual disk Multi disk Segmented rotor Expander tube Drum brake |
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Mechanical Independent Power boost Power brake |
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In line/ Integral Cone Ball Flapper |
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Types of hydraulic filters |
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3 types of hydraulic fluid |
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Vegetable Petroleum Phosphate-Ester |
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3 methods of pressurizing Reservoirs |
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Definition
Engine bleed air Variable displacement pump Hydraulic system pressure |
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Delta P indicator? What does it do? |
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Definition
Differential Pressure indicator -Prevents over pressurization -Indicates clogged filter |
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Synthetic Phosphate ester (skydrol) |
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Ensures components move in order Manually operated check valve |
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Used between actuators and controls Relieves pressure due to heat expansion Relieves small amount of fluid |
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Definition
Relief valves Pressure regulators Pressure reducers |
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2 types of spring steel landing gears |
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Oleo strut Spring steel Shock cords Trailing link |
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Definition
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4 Types of extension methods |
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Definition
Electrical Hydraulic Pneumatic Emergency |
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2 types of hydraulic systems |
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Definition
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Definition
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Air conditioning pressurization |
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Term
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-Selector -Check -Sequence -Prority -Quick disconnect -Hydraulic fuses -Pressure control |
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Definition
-Blue -Natural Rubber seals -Flammable --7644 |
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Definition
-Red -Neoprene/ Buna-N Seals -Flammable --5606 |
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Definition
-Purple -Butyl Rubber Seals -Fire Resistant -Skydrol |
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Term
A flow control valve that allows full flow in one direction, but no flow in the opposite direction is known as... |
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Definition
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A flow control valve that allows full flow in one direction and restricted flow in the other direction is known as... |
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Definition
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Term
What is the purpose of a hydraulic fuse? |
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Definition
Closes line should leak occur |
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Term
What is the purpose of the "Stand Pipe" in a hydraulic reservoir? |
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Definition
To not use all fluid in a reservoir. Its at a higher point of the reservoir. |
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Term
What are 3 reasons for pressurizing a reservoir? |
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Definition
-Better fluid flow -High altitudes -Prevent fluid foaming |
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Term
Difference between priority valve and sequence valves? |
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Definition
Priority - Actuated by hydraulic pressure Sequence - Mechanically actuated |
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Term
When adjusting pressure in a system with multiple relief valves, what order should they be adjusted in? |
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Definition
Highest pressure to lowest pressure |
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Definition
Stores hydraulic pressure |
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Term
3 types of pumps used in hydraulic systems |
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Definition
Hand pump Variable displacement Constant displacement |
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4 types of Constant displacement pumps |
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Term
Why should minimum fuel load be considered when operating hydraulic components on some aircraft? |
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Definition
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Term
What is the purpose of a shimmy damper? |
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Definition
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Term
What is the purpose of a fusible plug? |
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Definition
Melts at high temp to allow tire to deflate to reduce risk of explosion |
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Term
What is the purpose of a compensator port in a brake master cylinder? |
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Definition
-keeps pressure chamber full -allows for thermal expansion |
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Term
What is the purpose of chines on a tire? |
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Definition
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Term
3 defects that render a tire un-airworthy |
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Definition
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Term
Where should tires be stored? |
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Definition
-cool / dry / dark location -32 - 80 F -away from fuel & oil -original container not bins or nail -wrap in heavy paper and dust w/talc -away from electric motors & ozone |
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Term
Safety precautions used when servicing a tire |
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Definition
-regulator. -inflation cages. -Following established maintenance manual procedures. -Outfitting all servicing equipment with regulators. -Inflating wheel/tire assemblies only with nitrogen. |
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Term
What is a debooster valve? |
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Definition
-reduce pressure & gain in volume -compensating port |
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Term
2 advantages of carbon over steel brakes |
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Definition
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Term
3 main components of an anti-skid system |
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Definition
-A/S valves -Wheel speed sensor -Computer -Fluid lines |
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Term
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Definition
2 pieces of sheet metal with small amount of grease between to place under tire so tire can be moved easily during alignment |
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