Hydraulics Flashcards
(23 cards)
Q.How are the left and right hydraulic system fluids cooled?
A.By a heat exchanger in the fuel hopper
Q.What is the function of the Pressure Relief Valve (PRV) in the pressurization system?
A.It is a pneumatically operated valve which provides positive and negative pressure relief in case of normal pressurization system failure.
Q.Where is the AUX system reservoir located?
A.In the left system reservoir.
Q.What is the recommended Tire pressure for all takeoff gross weights (Aircraft stationary for at least two (2) hours)?
A.216PSI
Q.PTU is armed. What will activate the PTU?
A.Left hydraulic system pressure below 2400 psi.
Q.What is the correct pre-charge pressure for the inboard/outboard brake accumulator?
A.700 PSI
Q.Can the PTU still be used if the right hydraulic system is overheating (temperature above 107?C)?
A.Yes, by selecting the PTU ON switch to On.
Q.The PTU will receive pressure from which system to use left system fluid to prevent pressure to most left system components?
A. Right.
Q.Where is the AUX hydraulic reservoir located?
A.In the left system reservoir.
Q.Which hydraulic systems can operate the flaps?
A.Left, PTU and AUX.
Q.AUX pump is armed. When will the AUX Pump activate while in flight?
A.Only during Gear and/or Flaps operation with Left hydraulic system pressure below 1500 psi
Q.How are the left and right hydraulic system fluids cooled?
A.By a heat exchanger in the fuel hopper
Q.Which system hydraulically powers the left engine thrust reverser?
A.Left
QWhat is the correct pre-charge pressure for the hydraulic accumulators?
A 1,200 psi
Q.what is the normal system pressure for both the left and right hydraulic system?
A.3000 PSI
Q.What is the function of the Pressure Relief Valve (PRV) in the pressurization system?
A.It is a pneumatically operated valve which provides positive and negative pressure relief in case of normal pressurization system failure.
Q.Which hydraulic systems are capable of providing hydraulic power to extend and retract the landing gear in flight?
A.Left, PTU and AUX.
Q.What is the in-flight time limit period of the AUX pump when selected ON?
A.2 minutes
Q.When does the hydraulic Shut-Off Valve in the supply line of the Engine Driven Pump close?
A.Only when the fire handle is pulled
Q.Where are the Electrical Backup Hydraulic Actuator (EBHA) Circuit Breakers Located?
A.In the Tail Compartment.
Q.Only Brake Accumulator pressure is available. Which Brake functions will be available?
A.Both Normal and Parking/Emergency Brake operation
Q.What is the function of the Pressure Relief Valve (PRV) in the pressurization system?
A.It is a pneumatically operated valve which provides positive and negative pressure relief in case of normal pressurization system failure.
