Block 5 Hydraulics

Question 1

State Pascal’s Law

Answer 1

The pressure exerted anywhere upon an enclosed liquid is transmitted undiminished, in all directions, to the interior of the container.

Question 2

Name the hydraulic fluid utilized in the P-8A

Answer 2

BMS 3-11 Type 4 Class 1

Question 3

What is Hydraulic Power supplied by?

Answer 3

Three Functionally independent systems
System A
System B
Standby 3000 psig System

Question 4

What kind of pumps are Systems “A” and “B” powered by?

Answer 4

Each system is powered by one Engine Driven Pump (EDP) and one AC electric motor driven pump.

Question 5

What is each Engine Driven Pump capable of?

Answer 5

34 rpm at 2900 psig.

Question 6

What is the Ground Servicing System?

Answer 6

Fills all hydraulic reservoirs from one central location.

Question 7

What does the Auxiliary Hydraulic Systems supply?

Answer 7

Alternate pressure sources to hydraulic system A and B.

Question 8

How many modes of operations does the Standby Hydraulic System have?

Answer 8

Two modes of operations.
Manual (for use of Leading Edge Devices and Thrust Reversers)
Automatic (for use of the Rudder)

Question 9

The Standby Hydraulic System supplies alternate hydraulic pressure to what systems?

Answer 9

• Thrust Reversers.
• Leading Edge Flaps and Slats.
• Rudder

Question 10

The Hydraulic Power Transfer Unit System supplies alternate hydraulic pressure to what system?

Answer 10

Leading Edge Flaps and Slats only

Question 11

What’s the purpose of the Hydraulic Indicating System?

Answer 11

Gives indications of fluid quantity, system pressure, pump low pressure, and fluid overheat.

Question 12

What are components of the Hydraulic Indicating System?

Answer 12

1. Hydraulic Fluid Quantity Indicating System.
2. Hydraulic Pump Low Pressure Indicating System.
3. Hydraulic Fluid Overheat Warning System
4. Hydraulic Pressure Indicating System.