Hydraulics RKA Questions

Question 1

How many hydraulic systems are there?

Answer 1

• Three (AOM 9-11-01)

Question 2

What nominal pressure do all three hydraulic systems operate at?

Answer 2

• 3,000 psi (AOM 9-11-01)

Question 3

What pressure is an amber tick mark placed at on the pressure indication for all three systems on the hydraulic synoptic page?

Answer 3

• 1,800 psi (AOM 9-11-30)

Question 4

What color is the symbol for shutoff valves that are OPEN, engine driven pumps that are ON and hydraulic flow lines that are PRESSURIZED?

Answer 4

• Green (AOM 9-11-30)

Question 5

Will a failure of two hydraulic systems result in a complete loss of flight-critical functions?

Answer 5

• No, due to system design (AOM 9-11-50)

Question 6

What is hydraulic system 1 compromised of?

Answer 6

1. One Reservoir
2. One engine driven pump (EDP 1)
3. One electrical DC motor pump (DCMP 1)
4. One shutoff valve (SOV 1)
5. One Accumulator

(AOM 9-11-50)

Question 7

What is hydraulic system 2 compromised of?

Answer 7

1. One Reservoir
2. One engine driven pump (EDP 2)
3. One shutoff valve (SOV 2)
4. One accumulator

(AOM 9-11-50)

Question 8

What is hydraulic system 3 compromised of?

Answer 8

1. One Reservoir
2. One Electrical DC motor pump (DCMP 3)
3. One Accumulator

(AOM 9-11-50)

Question 9

Hydraulic system 3 is designed to operate in conjunction with what electrical system (s)?

Answer 9

1. The Battery (and)
2. Ram Air Turbine (RAT)

(AOM 9-11-50)

Question 10

What is the only source of hydraulic power for hydraulic system 3?

Answer 10

• The electric DCMP 3 (AOM 9-11-50)

Question 11

What is the source of electrical power for the electric DCMP3 (hydraulic system 3)?

Answer 11

• EMER BUS 3

(AOM 9-11-50)

Question 12

If the airplane loses HYD 1 and HYD 2, will the overheat protection system of HYD 3 still be functional?

Answer 12

• No, it will be inhibited

(AOM 9-11-50)

Question 13

What is the backup for hydraulic systems 1 and 2?

Answer 13

• The PTU

(AOM 9-11-50)

Question 14

What is the primary function of the PTU?

Answer 14

• To transfer power from hydraulic system 1 to system 2 or vice versa (AOM 9-11-50)

Question 15

When the PTU knob is in the AUTO position, when will the LGHCUs automatically activate the PTU?

Answer 15

1. In the event of an engine failure (or)
2. EDP failure

(AOM 9-11-50)

Question 16

What MFD page provides a visual representation of the hydraulic system operation and parameters?

Answer 16

• The HYDRAULIC synoptic page (AOM 9-11-30)

Question 17

When will the DCMP 1 be automatically commanded on with the HYD 1 ELEC PUMP knob in the AUTO position?

Answer 17

• During takeoff and landing phases (AOM 9-11-50)

Question 18

When hydraulic temp reaches … the PTU shuts down until temp reaches … and then PTU switches on again.

Answer 18

145

100