AS 411 EXAM 3 QUESTIONS & ANSWERS
How many Hydraulic systems are on the B737- Answers - 3, A, B, standby
1. 737 hydraulic pressure rating- Answers - 3000psi
2. 787 hydraulic pressure rating- Answers - 5000PSI
3. How many Hydraulic systems are on the B787 and A321-
Answers - 3 for both 787 - left right center
a321 -blue yellow green
4. How many sources of power for hydraulic 737 and 787- Answers - 737 - 2 edp/2acp/1
standby - total 5
787 - 2edp/4emp/1 rat - total 7
5. what is a EDP- Answers - Engine Driven Pump
6. what is ACMP- Answers - alternating current motor pump
7. when engines are shut down on the 737 is the EDP used or ACMP- Answers -
ACMP as it is battery powered
8. where is the STBY hydraulic pump and brake accumulator in 737- Answers - aft of
right wheel well
9. is the PTU a source of hydraulic power for the 737- Answers - No
10. does the 737 have a RAT- Answers - no
11. does the A321 have a rat- Answers - yes
12. what is a PTU and what does it do- Answers - power transfer unit provide additional power
to operate autoslats and leading edge devices when B EDP is not operational
13. does the PTU transfer fluid or power- Answers - power
14. PTU works automatically when what conditions are met- Answers - B edp
pressure drops airborne
1/6
, flaps less than 15 but not up
15. Does the landing gear transfer unit address gear up or down issues and what
condition needs to be met- Answers - raising the gear and A edp is broken or left engine failure
16. can the 737 make 2nd segment of climb when the gear is down and one
functional engine- Answers - no
17. standby hydraulic system can be activated what two ways- Answers - manually or
automatically
18. what does the standby hydraulic system power 4 things-
Answers - TRs rudder
2/6
How many Hydraulic systems are on the B737- Answers - 3, A, B, standby
1. 737 hydraulic pressure rating- Answers - 3000psi
2. 787 hydraulic pressure rating- Answers - 5000PSI
3. How many Hydraulic systems are on the B787 and A321-
Answers - 3 for both 787 - left right center
a321 -blue yellow green
4. How many sources of power for hydraulic 737 and 787- Answers - 737 - 2 edp/2acp/1
standby - total 5
787 - 2edp/4emp/1 rat - total 7
5. what is a EDP- Answers - Engine Driven Pump
6. what is ACMP- Answers - alternating current motor pump
7. when engines are shut down on the 737 is the EDP used or ACMP- Answers -
ACMP as it is battery powered
8. where is the STBY hydraulic pump and brake accumulator in 737- Answers - aft of
right wheel well
9. is the PTU a source of hydraulic power for the 737- Answers - No
10. does the 737 have a RAT- Answers - no
11. does the A321 have a rat- Answers - yes
12. what is a PTU and what does it do- Answers - power transfer unit provide additional power
to operate autoslats and leading edge devices when B EDP is not operational
13. does the PTU transfer fluid or power- Answers - power
14. PTU works automatically when what conditions are met- Answers - B edp
pressure drops airborne
1/6
, flaps less than 15 but not up
15. Does the landing gear transfer unit address gear up or down issues and what
condition needs to be met- Answers - raising the gear and A edp is broken or left engine failure
16. can the 737 make 2nd segment of climb when the gear is down and one
functional engine- Answers - no
17. standby hydraulic system can be activated what two ways- Answers - manually or
automatically
18. what does the standby hydraulic system power 4 things-
Answers - TRs rudder
2/6
