SY110 / SY111 - Hydraulic System 1 & 2

Both SY110 and SY111 lessons

What are the four devices operated by the primary hydraulic system under normal operations?

a. Landing gear/main gear doors, flaps, speed brake, and trim aid device

b. Landing gear/main gear inboard doors, flaps, speed brake, and nosewheel steering

c. Landing gear, flaps, speed brake, and flight controls

d. Landing gear, main gear inboard doors, flaps, speed brake, and lights

b. Landing gear/main gear inboard doors, flaps, speed brake, and nosewheel steering

The hydraulic system and the return side of the power package reservoir are pressurized to which levels respectively?

a. 2,000 ±120 and 50 psi

b. 2,000 ±120 and 60 psi

c. 3,000 ±120 and 40 psi

d. 3,000 ±120 and 50 psi

d. 3,000 ±120 and 50 psi

When you select a cockpit control to lower the flaps, which element of the primary hydraulic system is responsible for activating the corresponding actuator?

a. Reservoir piston

b. Electrical selector valve

c. Main strut

d. Release valve

b. Electrical selector valve

The hydraulic pressure indicated by this Engine/Systems display is

a. in the extended scale, within safe and normal operating limits.

b. within normal operating limits.

c. at a cautionary level.

d. indicating a failure of the primary hydraulic system.

b. within normal operating limits.

During the loss of engine power, the primary hydraulic system, or the battery bus, the emergency package will allow a one-time extension of

a. flaps, speed brake, and nosewheel steering.

b. flaps, landing gear, and speed brake.

c. flaps, landing gear, and main gear inboard doors.

d. flaps, landing gear and main gear inboard doors, and speed brake.

c. flaps, landing gear, and main gear inboard doors.

The emergency package’s manifold contains which of the following?

a. Two emergency extension selector valves

b. Two metal bellows compressing helium gas

c. Two actuators

d. 2,000 psi emergency accumulator

a. Two emergency extension selector valves

What is the purpose of the pressure release valve in the emergency hydraulic system?

a. To activate the actuators

b. To automatically release pressure, should it reach 3500 psi

c. To prevent engine fires

d. To provide manual reduction in pressure in the emergency accumulator

b. To automatically release pressure, should it reach 3500 psi

When the EHYD PX LO annunciator illuminates, it means that emergency accumulator hydraulic pressure is below __________ ±150 psi.

a. 1790

b. 1880

c. 2400

d. 3000

c. 2400

Which set of landing gear doors are operated hydraulically?

a. The nosewheel doors

b. The main gear inboard and outboard doors

c. The main gear inboard doors

d. The main gear outboard doors

c. The main gear inboard doors

A red light illuminated in the landing gear selector handle indicates that the PCL is approaching IDLE, with the gear handle up, or which of the following?

a. The landing gear doors are up and locked.

b. The landing gear doors are not closed.

c. The landing gear circuit breaker needs to be reset.

d. The landing gear is malfunctioning.

b. The landing gear doors are not closed.

Which of these gear position lights indicates that the gear is down and locked and the inboard main gear doors are in transit (Figure 110-20)?

Before extending the landing gear,

a. activate the aural warning silence button.

b. reduce airspeed below 150 KIAS.

c. ensure at least 2,000 psi is available.

d. reduce airspeed below 120 KIAS.

b. reduce airspeed below 150 KIAS.

What is the function of the emergency landing gear extension handle?

a. It releases hydraulic pressure once it reaches 3,500 psi.

b. It activates the emergency system.

c. It closes the slide valve assembly.

d. It activates the accumulator piston.

b. It activates the emergency system.

The engine-driven pump pressurizes the hydraulic system to which of the following?

a. 1,790 ±120 psi

b. 2,000 ±120 psi

c. 3,000 ±120 psi

d. 3,600 ±120 psi

c. 3,000 ±120 psi

The primary hydraulic system operates which of the following?

a. Landing gear, main gear doors, flaps, and trim aid device

b. Landing gear, flaps, nosewheel steering, trim aid device, and speed brake

c. Landing gear, main gear inboard doors, flaps, nosewheel steering, and speed brake

d. Landing gear, flaps, speed brake, and wheel brakes

c. Landing gear, main gear inboard doors, flaps, nosewheel steering, and speed brake

What is true about the power package reservoir?

a. It releases excess pressure at 1,790 psi.

b. It is pressurized using compressed nitrogen gas.

c. It is pressurized using compressed helium gas.

d. A piston helps to step-down pressure to protect the pump.

d. A piston helps to step-down pressure to protect the pump.

The primary hydraulic system’s selector manifold contains which of the following?

a. Engine-driven pump

b. Electrical selector valves

c. Actuators

d. Reservoir piston

b. Electrical selector valves

Two specific conditions in which the emergency hydraulic system is used are:

a. The pressure drops below 3,000 psi, and you’re below 6,000 feet

b. Loss of engine power or the primary hydraulic system fails

c. Loss of engine power and the airspeed is less than 120 knots

d. More than a 2-second drop in pressure, and altitude is less than 6,000 feet

b. Loss of engine power or the primary hydraulic system fails

The emergency hydraulic system specifically operates which of the following?

a. Landing gear, flaps, and speed brake

b. Landing gear, main gear doors, speed brake, and flaps

c. Landing gear, main gear doors, nose gear doors, and flaps

d. Landing gear, main gear inboard doors, and flaps

d. Landing gear, main gear inboard doors, and flaps

The emergency package receives its pressure from which of the following?

a. Directly from a nitrogen pre-charge in the reservoir

b. From the emergency accumulator

c. Directly from the reservoir piston

d. From the emergency selector valves

b. From the emergency accumulator

Before lowering the gear using either the primary or emergency systems, ensure the

a. flaps are retracted.

b. airspeed is below 120 KIAS.

c. flap handle is in the LAND position and airspeed less than 120 KIAS.

d. airspeed is below 150 KIAS.

d. airspeed is below 150 KIAS.

The amber EHYD PX LO annunciator light means which of the following?

a. Pressure in the emergency accumulator is below 2,400 psi ±150.

b. Pressure in the reservoir is below 3,000 ±120 psi.

c. Pressure in the emergency package is below 2,870 psi.

d. Pressure in the emergency package is below 1 quart.

a. Pressure in the emergency accumulator is below 2,400 psi ±150.

The HYDR FL LO annunciator means which of the following?

a. Fluid level is below .5 quart.

b. Fluid level is below 1,790 psi.

c. Accumulator fluid level is below 1 quart.

d. Reservoir fluid level is below 1 quart.

d. Reservoir fluid level is below 1 quart.

When the power package slide valve closes, the hydraulic pump pressure is prevented from energizing any hydraulic components except for the

a. main landing gear actuator.

b. nosewheel steering actuator.

c. flap actuator.

d. emergency selector manifold.

b. nosewheel steering actuator.

What does using flaps in the landing setting allow you to do?

a. Maintain approach glidepath while increasing airspeed

b. Decrease approach glidepath while maintaining airspeed

c. Decrease approach glidepath while increasing airspeed

d. Maintain approach glidepath while reducing airspeed

d. Maintain approach glidepath while reducing airspeed

What happens if the primary hydraulic system fails?

a. The flaps cannot be used until they are serviced on the ground.

b. The electrical FLAPS CONT circuit breaker must be reset.

c. The flaps can be operated using the emergency system package.

d. The emergency system provides a one-time lowering and retraction of the flaps.

c. The flaps can be operated using the emergency system package.

Before operating the flaps using the emergency system, you must

a. check the flaps visually to find their position.

b. increase your speed above 150 KIAS.

c. check the annunciator panel for the BATTERY BUS indicator.

d. lower the landing gear using the emergency system.

d. lower the landing gear using the emergency system.

Which of the following is a critical limitation of the speed brake?

a. The speed brake will only extend if the flaps are extended.

b. The speed brake does not operate using the emergency hydraulic system.

c. The speed brake extends automatically if the PCL is moved to the MAX position.

d. The speed brake’s actuator is a part of the selector manifold.

b. The speed brake does not operate using the emergency hydraulic system.

Where does the pressure come from that creates the mechanical force to extend the speed brake?

a. From the primary hydraulic system

b. From the emergency accumulator

c. From the turning of the torque tube

d. From the circuit breaker placarded SPEED BRAKE on the generator bus circuit breaker panel

a. From the primary hydraulic system

Which of the following is an important difference between using the NWS or differential braking?

a. Differential braking results in a wider turn radius than NWS.

b. NWS is more sensitive than differential braking.

c. Differential braking should be avoided above 20 knots.

d. NWS provides a tighter turn radius than differential braking.

b. NWS is more sensitive than differential braking.

What happens to NWS if the primary hydraulic system fails?

a. The NWS receives its hydraulic pressure from the emergency accumulator.

b. The pilot must manually deselect NWS.

c. NWS sensitivity will increase because of differential pressure.

d. The NWS system will be inoperative and use of rudder and/or differential braking on the ground will be necessary.

d. The NWS system will be inoperative and use of rudder and/or differential braking on the ground will be necessary.

Which is true regarding the wheel brake system?

a. If the hydraulic system fails, the parking brake must be used.

b. The wheel brakes are not serviced by the emergency system, and will not be available if the primary system fails.

c. The wheel brake system will continue to operate if the primary hydraulic system fails.

d. The wheel brake system shares the primary hydraulic system pressure lines.

c. The wheel brake system will continue to operate if the primary hydraulic system fails.

Which is the procedure for activating the parking brake?

a. Pull and turn the handle 90° counterclockwise while pushing on the toe brakes.

b. Push and turn the handle 90° clockwise while pushing on the toe brakes.

c. Pull the handle while pushing on the toe brakes.

d. Pull and turn the handle 90° clockwise while pushing on the toe brakes.

d. Pull and turn the handle 90° clockwise while pushing on the toe brakes.

Which is true regarding the nosewheel steering system?

a. NWS has only one actuator in the manifold.

b. The emergency system provides pressure to NWS through the alternate hydraulic lines.

c. The NWS is separate from the selector manifold.

d. NWS has two actuators in the manifold.

c. The NWS is separate from the selector manifold.

Which is true regarding the NWS and emergency systems?

a. The emergency system powers the NWS through the accumulator.

b. The NWS will not operate if the primary hydraulic system fails.

c. Differential braking will not work if the primary hydraulic system fails.

d. The emergency system powers the NWS through the selector control valve.

b. The NWS will not operate if the primary hydraulic system fails.

Which component specifically ensures the nosewheel is properly aligned before it is retracted or extended?

a. Selector valve

b. Centering valve

c. Servo valve

d. Rotary actuator

b. Centering valve

Engaging NWS at high speeds can result in

a. directional control problems due to increased sensitivity.

b. damage to the nosewheel steering actuator.

c. damage to the nosewheel steering centering valve.

d. the speed brake automatically extending, slowing the aircraft down.

a. directional control problems due to increased sensitivity.

What are the functions of the speed brake?

a. Reduce drag and reduce lift

b. Decelerate, and increase descent rate without increasing airspeed

c. Increase drag and accelerate

d. Increase true airspeed while reducing induced and parasite drag

b. Decelerate, and increase descent rate without increasing airspeed

Which is true regarding the speed brake?

a. It will not operate using the emergency system.

b. It extends only partially using the emergency system.

c. It extends but will not retract using the emergency system.

d. It will remain extended until the PCL is moved to IDLE.

a. It will not operate using the emergency system.

Which of the following will not cause the speed brake to retract?

a. The PCL is moved to MAX.

b. The flaps are extended.

c. The speed brake switch is moved forward.

d. The gear is retracted.

d. The gear is retracted.

If the flap indicator fails, how can flap extension be confirmed?

a. Observing a slight nose down tendency

b. Observing a slight nose up tendency

c. The pilot must visually confirm the flap position

d. By using the hydraulic pressure gauge

b. Observing a slight nose up tendency

Which statement below is correct regarding flap operations?

a. Normal flap operation is available when the battery bus has failed.

b. The flap position indicator will function normally when the battery bus has failed.

c. Emergency flap operation is not available when the auxiliary battery is the only source of electrical power.

d. Emergency flap operation is available when the auxiliary battery is the only source of electrical power.

c. Emergency flap operation is not available when the auxiliary battery is the only source of electrical power.

Which is true regarding the parking brake?

a. The parking brake will not operate if the hydraulic system fails.

b. It is activated by first pulling and turning the handle 90° clockwise or counterclockwise.

c. The parking brake will operate partially using the emergency system.

d. The parking brake is applied by pushing on the toe brakes while simultaneously activating the handle.

d. The parking brake is applied by pushing on the toe brakes while simultaneously activating the handle.

Before lowering the flaps, you should ensure your airspeed is less than which value?

a. 120 KIAS

b. 138 KIAS

c. 147 KIAS

d. 150 KIAS

d. 150 KIAS

Which component is responsible for sending pressure to the main wheel brakes?

a. Selector valve

b. Reservoir

c. Master cylinder

d. Solenoid valve

c. Master cylinder

The __________ is/are interconnected with the elevator trim tab actuator to automatically input pitch trim to compensate for pitch effects as it is operated.

a. landing gear

b. flaps

c. rudder

d. speed brake

d. speed brake