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Hydraulics and Landing Gear > Lesson 4: PUMPS > Flashcards

Lesson 4: PUMPS Flashcards

1
Q

What is the principle operation of hydraulic pumps?

A

Low pressure at inlet High pressure at outlet

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2
Q

What are the 2 types of hydraulic pumps?

A

Hand Powered

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3
Q

Why would we use hand pumps?

A

Small aircraft Manual Backup

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4
Q

The 3 types of HAND PUMPS are?

A

Single Double Rotary

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5
Q

What is the difference between SINGLE and DOUBLE action HAND PUMPS?

A

Double moves fluid on BOTH strokes of the piston

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6
Q

What is the purpose of a ROTARY action hand pump?

A

Maintenance for LARGE aircraft

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7
Q

What are the 2 types of POWERED hydraulic pumps?

A

CONSTANT VARIABLE

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8
Q

What is installed in the system to relieve pressure when the pump delivers more fluid than the system needs?

A

REGULATOR RELIEF VALVE

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9
Q

What are the types of CONSTANT displacement pumps?

A

GEAR GEROTOR PISTON VANE SWASH

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10
Q

This pump is most common on MEDIUM pressure systems and uses SPUR gears

A

GEAR pump

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11
Q

Describe a GEROTOR pump

A

Uses a SPUR gear and a ROTOR with additional tooth

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12
Q

This type of pump is used for HIGH VOLUME, LOW PRESSURE hydraulic systems

A

VANE PUMP

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13
Q

This pump is used for HIGH PRESSURE systems

A

FIXED ANGLE PISTON

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14
Q

This piston uses a SWASH plate which gets rid of the angled housing

A

FIXED PITCH SWASH PLATE

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15
Q

What is the difference between a VARIABLE and CONSTANT displacement pump?

A

Only moves the amount of fluid required by the system

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16
Q

What is the primary source of power in the aircraft hydraulic system?

A

EDP

17
Q

What is the purpose of the CASE DRAIN?

A

Protect internal mechanics Cools Lubricates Relieves back pressure

18
Q

This part is a narrow portion of the DRIVE SHAFT that is designed to break in case of excessive TORQUE loading which prevents damage to pump or engine gearbox

A

SHEAR POINT

19
Q

What type of pump is this?

A

Double Action

20
Q

What type of pump is this?

A

Gear Pump

21
Q

What type of pump is this?

A

GEROTOR pump

22
Q

What type of pump is this?

A

VANE pump

23
Q

What type of pump is this?

A

FIXED ANGLE PISTON pump

24
Q

What type of pump is this?

A

FIXED PITCH SWASH PLATE pump

25
Q

What type of pump is this?

A

VARIABLE DISPLACEMENT

Hydraulics and Landing Gear (10 decks)

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