A. compressing the air charge in an accumulator.

B. the use of a pressure/heat exchanger.

C. compressing the fluid in a reservoir.

A. Yellow.

B. Green.

C. White.

A. allow continued press to essential systems during times of reduced supply.

B. dampen pressure inputs.

C. maintain a high pressure to all systems.

A. In the pressure line.

B. In the suction line.

C. In the case drain.

A. Fluid loss.

B. Increase in fluid pressure.

C. Increase in fluid temperature.

A. Increase acidity.

B. Increase viscosity.

C. Increase alkalinity.

A. Energised both open and closed depending on cockpit selection.

B. Energised Open.

C. Energised Closed for fail-safe.

A. By pressurising.

B. Vent Reservoir to atmosphere.

C. Pass over a tray.

A. are only ever used in an emergency.

B. store fluid under pressure.

C. provide additional fluid if leaks occur.

A. natural rubber.

B. synthetic rubber.

C. butyl rubber, ethylene propylene or Teflon.

A. acidity.

B. alkalinity.

C. viscosity.

A. show pressure and source of hydraulics.

B. show fluid temperature and quantity.

C. illuminate a light in the cockpit when the system is ready

A. restriction valve.

B. angle of swashplate.

C. IDG.

A. 1800 PSI.

B. 3000 PSI.

C. 300 PSI.

A. flush with methylated spirit.

B. flush with any hydraulic oil.

C. flush with same hydraulic oil.

A. use any hydraulic fluid.

B. use any hydraulic fluid made by the same manufacturer.

C. use the same/correct hydraulic fluid.

A. do a bonding check.

B. tighten only hand tight.

C. use two spanners to stop pipe from twisting.

A. Vent to atmosphere.

B. Pass through a restriction.

C. Pass over a tray.

A. energised to the run position.

B. used to prevent anything happening until there is hydraulic pressure.

C. de-energised to start the pump.

A. regulators.

B. gears.

C. servo pressure.

A. half way position.

B. minimum stroke.

C. maximum stroke

A. pump cavitation.

B. reverse flow.

C. overpressure.

A. a square section rubber ring within a steel washer.

B. a hard rubber square section ring with a soft rubber square section inner ring.

C. a rubber 'T' section ring sandwiched between two Teflon rings.

A. When selected on.

B. When there is sufficient hydraulic pressure available.

C. When selected off.

A. Drive Shaft, Swash Plate & Valve Block.

B. Swash Plate & Valve Block.

C. Drive Shaft, Swash Plate & Cylinder Block.

A. pressure is maintained at the selector valves at all times.

B. there is no pressure at the selector valves when no functions are required.

C. most of the major components of the system are included in a self contained unit.

A. Variable swashplate pump.

B. Reservoir, pump, selector valve, filter.

C. Hydraulic oil accumulator.

A. rapid depressurisation of system.

B. pump cavitation.

C. rapid fluctuations of instruments.

A. the thickness of the wall on the pipe.

B. the specification of the pipe throughout the pipe run.

C. the type of fluid used to pressure test the pipe.

A. minimize the possibility of pump cavitation.

B. absorb pressure surges.

C. relieve excess pressure.

A. prevent a leak back of pressure.

B. prevent excess temperature.

C. relieve excess pressure.

A. accumulator.

B. engine driven pump.

C. selector.

A. preventing fluid loss from a leaking jack.

B. maintaining fluid press when the emergency system fails.

C. change over from main to auxiliary system in the case of failure.

A. restrict the rate of pressure build up.

B. control the rate of system operation.

C. limit the maximum pressure.

A. landing gear and doors.

B. safety switches.

C. brake anti-skid units.

A. direct fluid to the hydraulic actuator.

B. restrict the movement of components.

C. isolate one component from another.

A. 4000 PSI.

B. 3000 PSI.

C. 1000 PSI.

A. low accumulator pressure.

B. moisture in the fluid.

C. relief valve set too high.

A. two NRVS fitted.

B. relief valve.

C. piston ram displacement.

A. is not important.

B. must be minimum working.

C. must be at maximum.

A. require an automatic cut-out valve in the system.

B. require an automatic cut-out valve and accumulator in the system.

C. are self idling.

A. a striker pin.

B. the pilot.

C. the operation of a NRV.

A. before a pressure gauge.

B. before a pressure sequence valve.

C. before a pressure relief valve.

A. the reservoir must be checked for correct level.

B. the fluid pressure must be released.

C. all air must be bled from the system.

A. provide a reserve of stored energy.

B. maintain a constant fluid level.

C. minimize the possibility of pump cavitation.

A. only the specified fluid.

B. any fluid of the same specific gravity.

C. any hydraulic fluid available.

A. accumulator and automatic cut-out valve.

B. accumulator and shuttle valve.

C. accumulator and relay valve.

A. limit pump wear.

B. prevent the hydraulic lock forming.

C. raise fluid boiling point.

A. to maintain a back pressure to the accumulator.

B. relieve excessive pressure to return.

C. to ensure a supply of fluid to essential services in the event of system failure.

A. senses fluid temperature change.

B. senses fluid pressure.

C. provides cooling for the fluid

A. methylated spirits.

B. the same type of fluid as used in the system.

C. any clean hydraulic fluid.

A. landing gear and auto-brake systems.

B. nose wheel steering.

C. flying controls if hydraulic power lost.

A. a tap into a convenient return line.

B. a stack pipe higher than the normal level.

C. the bottom of the reservoir.

A. single acting.

B. low pressure.

C. double acting.

A. a pressure reducing valve is used.

B. a pressure regulating valve is used.

C. a pressure relief valve is used.

A. area * volume.

B. area * pressure.

C. pressure * stroke.

A. has two control surfaces under its control.

B. has the rams parallel.

C. has the actuator rams co-axial.

A. expands in length and diameter.

B. contracts in length and diameter.

C. contracts in length and expands in diameter.

A. a fixed volume pump.

B. pressures above 3000 PSI.

C. a variable volume pump