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Hydraulics and Landing Gear > Lesson 3: RESERVOIRS AND FILTERS > Flashcards

Lesson 3: RESERVOIRS AND FILTERS Flashcards

1
Q

What is the purpose of a RESERVOIR?

A

Store fluid
Thermal Expansion
Air purging
Cooling (external fins)

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2
Q

What is a FILLER NECK?

A

Add fluid

Lower than top to provide foaming space

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3
Q

This component in the reservoir prevents surging/swirling of fluid and to separate air from fluid at return flow

A

Integral fins

Baffles

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4
Q

What are the 2 types of reservoirs?

A

Integral

IN LINE

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5
Q

Which reservoir is used for modern aircraft?

A

IN LINE

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6
Q

This type of reservoir is used for aircraft that fly at LOW altitudes

A

Unpressurized

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7
Q

What are the characteristics of an UN-PRESSURIZED reservoir?

A

Atmosphere vented
Filler cap at reservoir
Serviced while working
Integral return filter

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8
Q

This type of reservoir is used for aircraft that fly at HIGHER altitudes to compensate for low ambient pressures

A

PRESSURIZED

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9
Q

What is the purpose of PRESSURIZED reservoirs?

A

Positive pressure on fluid
Prevent CAVITATION
Prevent foaming

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10
Q

What are the 3 types of PRESSURIZED reservoirs?

A

Aspirator(variable dis. pump)
Engine Bleed Air
Hydraulic System pressure

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11
Q

This type of reservoir is installed in the RETURN line and uses CABIN/AMBIENT air

A

Aspirator

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12
Q

What is the header pressure of an ASPIRATOR regulator?

A

30-35 psi

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13
Q

This type of reservoir uses the COMPRESSOR to keep header pressure at 40-45 psi

A

ENGINE BLEED AIR

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14
Q

Ground pressurization valves are used for what?

A

Maintenance for engine bleed air

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15
Q

This type of reservoir uses differential piston and has a pressure ratio of 50:1

A

BOOTSTRAP

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16
Q

What are the 2 ways of servicing a hydraulic system?

A

Suction hose

External hand pump

17
Q

What are the applications of a hydraulic FILTER?

A

Pressure
Return
Case drain

18
Q

This type of filter uses a pleated paper element, disposable and is most commonly used on he RETURN line

A

MICRONIC

19
Q

This type of filter is made from a stainless steel wire woven into mesh

A

METALLIC

20
Q

Two stage filters are usually used fro what?

A

Return of large aircraft

21
Q

If the flow is greater than 5-7 gallons what happens?

A

Bypass PRIMARY to reduce pressure drop

22
Q

This type of filter is used on the pressure side and consists of discs/spacers

A

CUNO

23
Q

What does a pop out identify?

A

Clogging

24
Q

What is the purpose of a THERMAL LOCKOUT DEVICE?

A

Prevent false indication when the fluid is COLD

25
Q

What is filter module?

A

what the system filters are part of

26
Q

Where do you check for signs of leakage?

A

Filter bowl

Housing

Hydraulics and Landing Gear (10 decks)

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