Hydraulic Systems Quiz

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Which component prevents damage from high system pressure in the hydraulic system?

The engine-driven pump

The one-way check valve

The pressure relief valve (correct)

The hydraulic fuse

Where is the hydraulic system service bay located?

In the upper aft fuselage behind the right wing trailing edge

In the upper aft fuselage behind the left wing trailing edge

In the lower aft fuselage behind the left wing trailing edge

In the lower aft fuselage behind the right wing trailing edge (correct)

What does the hydraulic pump pressurize in the system?

The nose wheel steering and hydraulic fuse

The normal system and emergency accumulator (correct)

The flaps and speed brake

The landing gear and main gear doors

At what pressure does the hydraulic pressure display change from white to amber?

1800 psi Signup and view all the answers

What does an amber HYD FL LO caution indicate on the EICAS display?

The fluid level is low Signup and view all the answers

How is the hydraulic fluid level checked in the hydraulic system service bay?

By comparing the position of the green indicating rod to marked indicator windows Signup and view all the answers

What should be done if the fluid level is not FULL AC or FULL AD?

Depressurize the emergency accumulator Signup and view all the answers

What should happen to the fluid level in the reservoir as the accumulator discharges?

It should increase Signup and view all the answers

When should the hydraulic system be serviced?

When the accumulator is fully discharged Signup and view all the answers

What is the capacity of the engine-driven pump in the hydraulic system?

Approximately 5 quarts Signup and view all the answers

Where is the circuit breaker for the hydraulic system located?

On the battery bus circuit breaker panel in the front cockpit Signup and view all the answers

What happens when the circuit breaker for the hydraulic system is open?

The pressure indication and HYD FL LO sensor is not available Signup and view all the answers

How is the emergency hydraulic pressure activated?

By pulling the emergency gear extension handle in the front cockpit Signup and view all the answers

What is the indication of the emergency accumulator's status?

An amber EHYD PX LO caution on the EICAS Signup and view all the answers

What prevents the emergency system from bleeding back into the main system?

A check valve Signup and view all the answers

What is the maximum fluid loss allowed in the event of an emergency hydraulic system leak?

20-30 cubic inches (0.5 quart) Signup and view all the answers

When will the HYD FL LO caution illuminate?

When there is insufficient fluid in the main reservoir Signup and view all the answers

What happens if the leak rate in the emergency system is below.25 GPM?

The system depletes the main reservoir until the HYD FL LO caution illuminates Signup and view all the answers

What is the purpose of the landing gear system?

To retract and extend the landing gear Signup and view all the answers

What are the major components of the landing gear system?

Two main landing gear, outboard gear doors, inboard gear doors, and a steerable nose gear Signup and view all the answers

What happens to the flaps if power to the flap control circuit is lost?

The flaps will retract to the UP position Signup and view all the answers

Where is the emergency selector valve located?

In the hydraulic power system emergency manifold Signup and view all the answers

What happens to the flaps after emergency extension until the aircraft is serviced by maintenance?

The flaps can be retracted Signup and view all the answers

What does the position pointer on the flap indicator indicate?

Flap motion Signup and view all the answers

What is the maximum deflection of the speed brake?

70° Signup and view all the answers

When will the speed brake automatically retract?

When the FLAPS selector is moved out of the UP position Signup and view all the answers

Which component prevents damage from high system pressure in the hydraulic system?

The pressure relief valve Signup and view all the answers

What is the capacity of the engine-driven pump in the hydraulic system?

5 quarts Signup and view all the answers

Where is the hydraulic system service bay located?

In the lower aft fuselage behind the right wing trailing edge Signup and view all the answers

What is the indication of the emergency accumulator's status?

The position of the green indicating rod Signup and view all the answers

What should be done if the fluid level is not FULL AC or FULL AD?

Service the system Signup and view all the answers

When will the HYD FL LO caution illuminate?

When the accumulator is fully discharged Signup and view all the answers

Which type of steering is used for the nose wheel of the aircraft?

Free castoring steering Signup and view all the answers

What is the purpose of the friction collar on the nose landing gear strut cylinder?

To provide additional shimmy damping Signup and view all the answers

Where is the power for the nose wheel steering system provided from?

Generator bus Signup and view all the answers

What should be done if the nose wheel steering system fails to respond to pilot input?

Disengage the system Signup and view all the answers

What should be done if there is a known failure of the nose wheel steering system during takeoff?

Disengage the system Signup and view all the answers

What is the source of electrical power for the flap system?

Battery bus Signup and view all the answers

Which component prevents movement of the landing gear selector handle when the right weight-on-wheels switch is energized?

The downlock solenoid Signup and view all the answers

What is the purpose of the downlock override button?

To raise the landing gear handle when the right weight-on-wheels switch is energized Signup and view all the answers

What is the maximum fluid loss allowed in the event of an emergency hydraulic system leak?

20-30 cubic inches (0.5 quart) Signup and view all the answers

What is the indication of the emergency accumulator's status?

Amber EHYD PX LO caution on the EICAS Signup and view all the answers

Where is the circuit breaker for the hydraulic system located?

On the battery bus circuit breaker panel in the front cockpit Signup and view all the answers

What is the indication of the gear handle and red indicator lights?

The nose gear is in transit or main gear doors are not closed Signup and view all the answers

Which component is responsible for opening the inboard main gear doors in the landing gear system?

The hydraulic actuator Signup and view all the answers

What locks the nose gear in the down position during landing gear extension?

The over-center position of the folding strut Signup and view all the answers

What cockpit indications confirm that the landing gear is fully down and locked?

All of the above Signup and view all the answers

What activates the aural landing gear position warning?

All of the above Signup and view all the answers

When can the warning horn be silenced using the WARNING SILENCE button?

When the gear handle is raised with flaps LDG Signup and view all the answers

How is directional control during taxi accomplished?

All of the above Signup and view all the answers

Hydraulic Systems Quiz

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Questions and Answers

Which component prevents damage from high system pressure in the hydraulic system?

Where is the hydraulic system service bay located?

What does the hydraulic pump pressurize in the system?

At what pressure does the hydraulic pressure display change from white to amber?

What does an amber HYD FL LO caution indicate on the EICAS display?

How is the hydraulic fluid level checked in the hydraulic system service bay?

What should be done if the fluid level is not FULL AC or FULL AD?

What should happen to the fluid level in the reservoir as the accumulator discharges?

When should the hydraulic system be serviced?

What is the capacity of the engine-driven pump in the hydraulic system?

Where is the circuit breaker for the hydraulic system located?

What happens when the circuit breaker for the hydraulic system is open?

How is the emergency hydraulic pressure activated?

What is the indication of the emergency accumulator's status?

What prevents the emergency system from bleeding back into the main system?

What is the maximum fluid loss allowed in the event of an emergency hydraulic system leak?

When will the HYD FL LO caution illuminate?

What happens if the leak rate in the emergency system is below.25 GPM?

What is the purpose of the landing gear system?

What are the major components of the landing gear system?

What happens to the flaps if power to the flap control circuit is lost?

Where is the emergency selector valve located?

What happens to the flaps after emergency extension until the aircraft is serviced by maintenance?

What does the position pointer on the flap indicator indicate?

What is the maximum deflection of the speed brake?

When will the speed brake automatically retract?

Which component prevents damage from high system pressure in the hydraulic system?

What is the capacity of the engine-driven pump in the hydraulic system?

Where is the hydraulic system service bay located?

What is the indication of the emergency accumulator's status?

What should be done if the fluid level is not FULL AC or FULL AD?

When will the HYD FL LO caution illuminate?

Which type of steering is used for the nose wheel of the aircraft?

What is the purpose of the friction collar on the nose landing gear strut cylinder?

Where is the power for the nose wheel steering system provided from?

What should be done if the nose wheel steering system fails to respond to pilot input?

What should be done if there is a known failure of the nose wheel steering system during takeoff?

What is the source of electrical power for the flap system?

Which component prevents movement of the landing gear selector handle when the right weight-on-wheels switch is energized?

What is the purpose of the downlock override button?

What is the maximum fluid loss allowed in the event of an emergency hydraulic system leak?

What is the indication of the emergency accumulator's status?

Where is the circuit breaker for the hydraulic system located?

What is the indication of the gear handle and red indicator lights?

Which component is responsible for opening the inboard main gear doors in the landing gear system?

What locks the nose gear in the down position during landing gear extension?

What cockpit indications confirm that the landing gear is fully down and locked?

What activates the aural landing gear position warning?

When can the warning horn be silenced using the WARNING SILENCE button?

How is directional control during taxi accomplished?

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