Lesson 3: RESERVOIRS AND FILTERS

Question 1

What is the purpose of a RESERVOIR?

Answer 1

Store fluid
Thermal Expansion
Air purging
Cooling (external fins)

Question 2

What is a FILLER NECK?

Answer 2

Add fluid

Lower than top to provide foaming space

Question 3

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

Answer 3

Integral fins

Baffles

Question 4

What are the 2 types of reservoirs?

Answer 4

Integral

IN LINE

Question 5

Which reservoir is used for modern aircraft?

Answer 5

IN LINE

Question 6

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

Answer 6

Unpressurized

Question 7

What are the characteristics of an UN-PRESSURIZED reservoir?

Answer 7

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

Question 8

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

Answer 8

PRESSURIZED

Question 9

What is the purpose of PRESSURIZED reservoirs?

Answer 9

Positive pressure on fluid
Prevent CAVITATION
Prevent foaming

Question 10

What are the 3 types of PRESSURIZED reservoirs?

Answer 10

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

Question 11

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

Answer 11

Aspirator

Question 12

What is the header pressure of an ASPIRATOR regulator?

Answer 12

30-35 psi

Question 13

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

Answer 13

ENGINE BLEED AIR

Question 14

Ground pressurization valves are used for what?

Answer 14

Maintenance for engine bleed air

Question 15

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

Answer 15

BOOTSTRAP

Question 16

What are the 2 ways of servicing a hydraulic system?

Answer 16

Suction hose

External hand pump

Question 17

What are the applications of a hydraulic FILTER?

Answer 17

Pressure
Return
Case drain

Question 18

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

Answer 18

MICRONIC

Question 19

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

Answer 19

METALLIC

Question 20

Two stage filters are usually used fro what?

Answer 20

Return of large aircraft

Question 21

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

Answer 21

Bypass PRIMARY to reduce pressure drop

Question 22

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

Answer 22

CUNO

Question 23

What does a pop out identify?

Answer 23

Clogging

Question 24

What is the purpose of a THERMAL LOCKOUT DEVICE?

Answer 24

Prevent false indication when the fluid is COLD

Question 25

What is filter module?

Answer 25

what the system filters are part of

Question 26

Where do you check for signs of leakage?

Answer 26

Filter bowl | Housing