Hydraulic Power

Question 1

How many Hydraulic systems are there in the Airbus 320?

Answer 1

3 (Green, Blue, Yellow)

Question 2

2.) Do they have different Reservoir or do they share 1 reservoir?

Answer 2

Yes. They have different Reservoir and they don’t share 1reservoir

Question 3

3.) What do we use to prevent leaks from the component housings and provide a seal between 2 different fluid pressure within a component? For example: an O-Ring

Answer 3

Packings

Question 4

4.) What is the main pressurization pump for blue system?

Answer 4

Electric Pump (ACMP)

Question 5

5. What is the auxiliary pump used for the blue system?

Answer 5

RAM Air Turbine (RAT)

Question 6

6.) What is the main pressurization pump for green system?

Answer 6

Engine Driven Pump (EDP) from ENG 1 (Left)

Question 7

7. What is the auxiliary pump used for the green system?

Answer 7

Power Transfer Unit (PTU)

Question 8

8. What is the purpose of the PTU?

Answer 8

ans. It transfers hydraulic power between 2 Hydraulic systems with a motor/pump combination.

Question 9

9. Where does the hydraulic pressure supply for the Yellow Hydraulic System comes from?

Answer 9

ans. Engine driven Pump (EDP) from the ENG 2 (Right)

Question 10

10.) What is the auxiliary pump used for the yellow system?

Answer 10

ans. PTU or Electric Pump

Question 11

11.) When does the Main pressurization pump of blue system starts?

Answer 11

ans. It starts automatically when either engine starts

Question 12

12.) What is the purpose of the HP manifold?

Answer 12

ans. Supply pressure to the users, Distributes pressurized fluid to the users

Question 13

13.) Two kinds of seals used in our packings?

Answer 13

ans. Static Seals and Dynamic Seals

Question 14

14.) What kind of hydraulic fluids do we use?

Answer 14

ans. Synthetic Oil and Mineral Oil

Question 15

15.) What are the Disadvantages of the Synthetic Oil?

Answer 15

ans. It is Hydroscopic Quality

Question 16

16.) What are the good characteristics of the Synthetic Oil?

Answer 16

Low flammability, good lubricating quality, resistance to freezing, non- evaporating, non-foaming, chemical stability

Question 17

17.) Two types of piston pump?

Answer 17

ans. Variable Displacement Pump and Fixed Displacement Pump

Question 18

18.) Where do we normally used the Variable Displacement Pump?

Answer 18

All the EDP and ACMP of the Green,
Blue, Yellow Hydraulic system

Question 19

19.) Where do we normally used the Fixed Displacement Pump?

Answer 19

ans. Usually installed on ground service panels. They allow manual filling of the reservoir and the other provide manual opening of the cargo doors