747/400 Systems Exam Questions with 100%
Correct Answers
HYDRAULIC SYSTEM QUESTIONS
Subsystems associated with Hyd Sys 1 Correct Answer Flt Controls
Nose and Body Gear
Alternate Brakes
Inboard Flaps
Center Autopilot
Subsystems associated with Hyd Sys 2 Correct Answer Flt Controls
Stab Trim 1/2
Elevator Feel 1/2
Yaw Dampner
Right Autopilot
Alternate Brakes
Subsystems associated with Hyd Sys 3 Correct Answer Flt Controls
Stab Trim 1/2
Elevator Feel 1/2
Yaw Dampner
Left Autopilot
Subsystems associated with Hyd Sys 4 Correct Answer Flt Controls
Landing Gear
Normal Brakes
Outboard Flaps
Hyd Demand Pumps Number 1 & 4 are _____ Correct Answer Air Driven Pumps
Hyd Demand Pumps Number 2 & 3 are _____ Correct Answer Electrical Driven Pumps
Hyd Sys (SYS FAULT) light illuminates when Correct Answer Low hyd sys pressure
Low hyd reservoir quantity
Excessive hyd fluid temp
Hyd Demand Low (PRESS) light Correct Answer Associated selector to Off or Aux
Demand pump operates and output press low
Demand pump fails to operate
Engine Hyd pump low (PRESS) light Correct Answer Low engine hyd pump press
Hyd DEMAND pump selector AUTO Correct Answer Demand pump operates when
associated engine pump press is low or fuel control sw CUTOFF
,Demand 1 & 4 operate when flaps in transit or flaps out of up in flight
Hyd DEMAND (4) pump selector AUX Correct Answer Related Demand pump off
Does not trip off when EDP pressurizes
Operates on ground until related eng pump pressurizes
RF displayed next to HYD QTY indicates Correct Answer Reservoir requires refill
LO displayed nest to HYD QTY indicates Correct Answer Reservoir quantity is low
Hyd AUX pump gets electrical power from Correct Answer Ground Handling Bus
FUEL SYSTEM QUESTIONS Correct Answer ...
1 or 4 X Feed VALVE Lights illuminates Correct Answer Valve position does not agree
with switch position
2 or 3 X Feed VALVE light illuminates Correct Answer Valve is not in system logic
commanded position
When do we turn L & R CTR Fuel pumps on? Correct Answer Only on when fuel > than
17,000 #'s for takeoff.
Fuel < than 17,000 #'s & > than 7,000 during climb.
Fuel > than 4,000 when in cruise.
CWT pumps should be turned off, in cruise, when FUEL LOW CTR message displays
and fuel quantity is Correct Answer < than 3000 lbs
When FUEL TANK/ENG message displayed, in cruise, what action should be taken?
Correct Answer The OVRD pumps and XFEED valves should be pushed off after
confirming tank quantities.
FSMC's open Fuel X FEED valves #2 & 3
automatically, in flight, when Correct Answer Flaps are retracted
FWD & AFT Fuel pump (PRESS) light illuminates Correct Answer Fuel pump output
press low.
Tank 2 & 3 OVRD PRESS light ____ when sw is selected off. Correct Answer PRESS
light does not illuminate when switch is selected off.
When do the Fuel OVRD pumps operate? Correct Answer Fuel OVRD pumps operate
when commanded by system logic.
, What Fuel Pumps are activated when Fuel NOZZLE switch selected to ON Correct
Answer Activates Center & Main Tank Override/Jettison pumps in tanks containing fuel.
Fuel Pump must be ON.
Fuel Jettison Nozzle VALVE light illuminates Correct Answer Jettison nozzle valve not
in commanded position.
Fuel Jettison Selector selected off Correct Answer Disarms Jettison system.
Removes Fuel to Remain indication from Eicas.
Fuel Jettison Selector selected A or B Correct Answer Arms Jettison system.
Displays fuel to Remain indication on Eicas. (replaces fuel temp)
Time to Jettison displays 90 seconds after jettison begins.
What happens if you forget to turn off Jettison sys? Correct Answer Will continue to
jettison fuel until fuel reaches fuel tank standpipes. Approx 7000 lbs per tank.
How do you know when Fuel Jettisoning is complete? Correct Answer Fuel Jettison to
Remain indications flash white for 5 seconds. (Primary Eicas)
OVRD pumps will deactivate.
Normal Fuel Temp indication will turn amber when_____ Correct Answer Fuel temp is -
37C and below
Fuel Tank Temperature is measured in _____ Correct Answer Fuel Main Tank #1
A single Main tank fuel pump provides sufficient fuel operate ______ at takeoff Correct
Answer One Engine
A single OVRD fuel pump provides sufficient fuel operate ______ at takeoff Correct
Answer 2 Engines
CWT pumps are_____ pumps Correct Answer OVRD/Jettison
CTR Fuel Pumps override _____ pumps Correct Answer Main Tank OVRD/Jettison
pumps.
How is CWT fuel Scavenged?
Where is fuel discharged? Correct Answer Automatically by the FMC using a single ac
pump.
#2 Main Tank.
When does CWT scavenge pumping commence? Correct Answer When Main Tank 2
or 3 Tank decreases to 40,200 lbs
(When Reserve Tank 2 & 3 initiates transfer to Main tank 2 & 3)
Correct Answers
HYDRAULIC SYSTEM QUESTIONS
Subsystems associated with Hyd Sys 1 Correct Answer Flt Controls
Nose and Body Gear
Alternate Brakes
Inboard Flaps
Center Autopilot
Subsystems associated with Hyd Sys 2 Correct Answer Flt Controls
Stab Trim 1/2
Elevator Feel 1/2
Yaw Dampner
Right Autopilot
Alternate Brakes
Subsystems associated with Hyd Sys 3 Correct Answer Flt Controls
Stab Trim 1/2
Elevator Feel 1/2
Yaw Dampner
Left Autopilot
Subsystems associated with Hyd Sys 4 Correct Answer Flt Controls
Landing Gear
Normal Brakes
Outboard Flaps
Hyd Demand Pumps Number 1 & 4 are _____ Correct Answer Air Driven Pumps
Hyd Demand Pumps Number 2 & 3 are _____ Correct Answer Electrical Driven Pumps
Hyd Sys (SYS FAULT) light illuminates when Correct Answer Low hyd sys pressure
Low hyd reservoir quantity
Excessive hyd fluid temp
Hyd Demand Low (PRESS) light Correct Answer Associated selector to Off or Aux
Demand pump operates and output press low
Demand pump fails to operate
Engine Hyd pump low (PRESS) light Correct Answer Low engine hyd pump press
Hyd DEMAND pump selector AUTO Correct Answer Demand pump operates when
associated engine pump press is low or fuel control sw CUTOFF
,Demand 1 & 4 operate when flaps in transit or flaps out of up in flight
Hyd DEMAND (4) pump selector AUX Correct Answer Related Demand pump off
Does not trip off when EDP pressurizes
Operates on ground until related eng pump pressurizes
RF displayed next to HYD QTY indicates Correct Answer Reservoir requires refill
LO displayed nest to HYD QTY indicates Correct Answer Reservoir quantity is low
Hyd AUX pump gets electrical power from Correct Answer Ground Handling Bus
FUEL SYSTEM QUESTIONS Correct Answer ...
1 or 4 X Feed VALVE Lights illuminates Correct Answer Valve position does not agree
with switch position
2 or 3 X Feed VALVE light illuminates Correct Answer Valve is not in system logic
commanded position
When do we turn L & R CTR Fuel pumps on? Correct Answer Only on when fuel > than
17,000 #'s for takeoff.
Fuel < than 17,000 #'s & > than 7,000 during climb.
Fuel > than 4,000 when in cruise.
CWT pumps should be turned off, in cruise, when FUEL LOW CTR message displays
and fuel quantity is Correct Answer < than 3000 lbs
When FUEL TANK/ENG message displayed, in cruise, what action should be taken?
Correct Answer The OVRD pumps and XFEED valves should be pushed off after
confirming tank quantities.
FSMC's open Fuel X FEED valves #2 & 3
automatically, in flight, when Correct Answer Flaps are retracted
FWD & AFT Fuel pump (PRESS) light illuminates Correct Answer Fuel pump output
press low.
Tank 2 & 3 OVRD PRESS light ____ when sw is selected off. Correct Answer PRESS
light does not illuminate when switch is selected off.
When do the Fuel OVRD pumps operate? Correct Answer Fuel OVRD pumps operate
when commanded by system logic.
, What Fuel Pumps are activated when Fuel NOZZLE switch selected to ON Correct
Answer Activates Center & Main Tank Override/Jettison pumps in tanks containing fuel.
Fuel Pump must be ON.
Fuel Jettison Nozzle VALVE light illuminates Correct Answer Jettison nozzle valve not
in commanded position.
Fuel Jettison Selector selected off Correct Answer Disarms Jettison system.
Removes Fuel to Remain indication from Eicas.
Fuel Jettison Selector selected A or B Correct Answer Arms Jettison system.
Displays fuel to Remain indication on Eicas. (replaces fuel temp)
Time to Jettison displays 90 seconds after jettison begins.
What happens if you forget to turn off Jettison sys? Correct Answer Will continue to
jettison fuel until fuel reaches fuel tank standpipes. Approx 7000 lbs per tank.
How do you know when Fuel Jettisoning is complete? Correct Answer Fuel Jettison to
Remain indications flash white for 5 seconds. (Primary Eicas)
OVRD pumps will deactivate.
Normal Fuel Temp indication will turn amber when_____ Correct Answer Fuel temp is -
37C and below
Fuel Tank Temperature is measured in _____ Correct Answer Fuel Main Tank #1
A single Main tank fuel pump provides sufficient fuel operate ______ at takeoff Correct
Answer One Engine
A single OVRD fuel pump provides sufficient fuel operate ______ at takeoff Correct
Answer 2 Engines
CWT pumps are_____ pumps Correct Answer OVRD/Jettison
CTR Fuel Pumps override _____ pumps Correct Answer Main Tank OVRD/Jettison
pumps.
How is CWT fuel Scavenged?
Where is fuel discharged? Correct Answer Automatically by the FMC using a single ac
pump.
#2 Main Tank.
When does CWT scavenge pumping commence? Correct Answer When Main Tank 2
or 3 Tank decreases to 40,200 lbs
(When Reserve Tank 2 & 3 initiates transfer to Main tank 2 & 3)
