EXAMEN HYDRAULIC ATA 29

HOW MANY INDEPENDENT HYDRAULIC SYSTEMS DOES THE A320 HAVE?. Two (Green and Blue). Three (Green, Blue and Yellow). Four (Green, Blue, Yellow and Red).

WHAT IS THE NORMAL OPERATING PRESSURE OF THE A320 HYDRAULIC SYSTEMS?. 1,500 PSI. 2,500 PSI. 3,000 PSI.

WHICH HYDRAULIC SYSTEM IS PRESSURIZED BY THE RAT (RAM AIR TURBINE)?. Green system. Yellow system. Blue system.

WHAT POWERS THE GREEN HYDRAULIC SYSTEM NORMALLY?. Engine 2 driven pump and electric pump. Engine 1 driven pump (EDP) and electric pump. Only the electric pump.

WHAT IS THE PURPOSE OF THE PTU (POWER TRANSFER UNIT)?. To transfer hydraulic fluid between Green and Yellow systems. To pressurize the Blue system from the Green system. To transfer hydraulic power (pressure) between Green and Yellow systems without fluid transfer.

UNDER WHICH CONDITION DOES THE PTU OPERATE AUTOMATICALLY?. When differential pressure between Green and Yellow exceeds 500 PSI. When differential pressure between Green and Yellow exceeds 750 PSI. Only when manually activated by the crew.

WHICH HYDRAULIC SYSTEM POWERS THE NOSE WHEEL STEERING?. Blue system. Yellow system. Green system.

WHAT IS THE FLUID TYPE USED IN THE A320 HYDRAULIC SYSTEMS?. MIL-H-5606 (red mineral oil). Skydrol LD-4 (phosphate ester). ROYCO 756 (red mineral oil).

WHICH SYSTEM POWERS THE CARGO DOOR OPERATION ON THE GROUND?. Green system via EDP. Yellow system via electric pump. Blue system via electric pump.

HOW MANY ENGINE DRIVEN PUMPS (EDP) DOES THE A320 HAVE?. One (on Engine 2). Two (one on each engine). Three (two on engines, one auxiliary).

WHAT IS THE FUNCTION OF THE RAT (RAM AIR TURBINE) IN THE HYDRAULIC SYSTEM?. It cools the hydraulic fluid in emergency. It provides emergency hydraulic and electrical power when both engines fail. It transfers pressure from Green to Blue system.

WHICH HYDRAULIC SYSTEM POWERS THE FLIGHT CONTROLS PRIMARILY IN NORMAL OPERATIONS?. Only Green system. Green and Yellow systems. Green, Blue and Yellow systems.

WHAT IS THE APPROXIMATE FLUID QUANTITY OF THE GREEN HYDRAULIC RESERVOIR?. 10 liters. 15 liters. 23 liters.

WHERE IS THE LOW PRESSURE WARNING ACTIVATED IN THE HYDRAULIC SYSTEM?. Below 1,450 PSI. Below 1,750 PSI. Below 2,000 PSI.

THE BRAKING SYSTEM IS POWERED BY WHICH HYDRAULIC SYSTEMS?. Green only (normal) and Blue (alternate). Green (normal) and Yellow (alternate/parking brake). Yellow only.

WHICH COMPONENTS ARE POWERED BY THE BLUE HYDRAULIC SYSTEM?. Landing gear, nose steering and flaps. Spoilers, ailerons and elevator (one side), rudder and RAT. Cargo doors, parking brake and flaps.

WHAT IS THE PURPOSE OF THE HYDRAULIC FIRE SHUTOFF VALVE?. To isolate the EDP from the engine in case of hydraulic fire. To cut off hydraulic pressure to all actuators. To automatically depressurize the system during engine fire.

HOW IS THE YELLOW HYDRAULIC SYSTEM NORMALLY PRESSURIZED IN FLIGHT?. By Engine 1 EDP only. By Engine 2 EDP and an electric pump. Only by the electric pump.

WHAT HAPPENS TO THE PTU WHEN ONE ENGINE IS SHUTDOWN ON GROUND (SINGLE ENGINE TAXI)?. PTU is inhibited on ground. PTU activates automatically to maintain pressure on both systems. PTU is manually activated by the crew.

WHICH PANEL IS USED TO MONITOR AND CONTROL THE HYDRAULIC SYSTEMS IN THE COCKPIT?. Main Instrument Panel (MIP). Overhead Panel (HYD section). Center Pedestal.