The hydraulic oil, entering the hydraulic pump, is slightly pressurised to :

Discounting the possibility of leak, the level in a hydraulic reservoir will :

The Ram Air Turbine (RAT) provides emergency hydraulic power for :

To allow for failure of the normal method of system pressure limiting control, a hydraulic system often incorporates

In hydraulic system, a shuttle valve :

(For this question use annex 021-6736A) The schematic diagram annexed illustates a jack and selector valve in a typical hydraulic system. Assuming hydraulic pressure throughout :

An accumulator in a hydraulic system will :

Assuming a hydraulic accumulator is pre- charged with air to 1000 psi. If the hydraulic system is then pressurised to its operating pressure of 3000 psi, the indicated pressure on the air side of the accumulator should be :

Internal leakage in a hydraulic system will cause :

Assuming an accumulator is pre- charged with air to 1000 psi and the hydraulic system is pressurised to 1500 psi, the accumulator gauge will read :

(For this question use annex 021-6716A) In the hydraulic press schematically shown, what balancing Force would be acting on the right hand side ? (The diagram is not to scale)

Hydraulic fluids of synthetic origin are:

In hydraulic systems of large modern transport category aircraft the fluids used are:

Hydraulic fluids must have the following characteristics: 1. thermal stability 2. low emulsifying characteristics 3. corrosion resistance 4. good resistance to combustion 5. high compressibility 6. high volatility 7. high viscosity The combination regrouping all the correct statements is :

In a hydraulic braking system, an accumulator is precharged to 1200 psi. An electrically driven hydraulic pump is started and provides a system pressure of 3000 psi. The hydraulic pressure gauge which is connected to the gas section of the accumulator, reads:

Where in a hydraulic system might overheat indicators be installed?

Hydraulic fluids :

Hydraulic fluids used in systems of large modern airliners are:

Large transport aeroplane hydraulic systems usually operate with a system pressure of approximately:

The type of hydraulic oil used in modern hydraulic systems is:

In a modern hydraulic system, "hydraulic fuses" can be found. Their function is :

In a the reservoir is pressurized in order to:

The purpose of a shuttle valve is to:

Shuttle valves will automatically:

In addition to energy storage the accumulator of the hydraulic system is used :

Hydraulic power is a

The low pressure if

For an aeroplane hydraulic supply circuit, the correct statement is : nitrogen) and destined to serve as a fluid or pressure reserve.

The tanks of a hydraulic system are pressurized:

The type of hydraulic fluid which has the highest resistance against cavitation is :

The hydraulic device similar to an electronic diode is a :

The component that transforms the hydraulic pressure into a linear motion is called

The aircraft hydraulic system is designed to produce:

The function of the selector valve is to: parallel of two 12 volt/ 40 amphours batteries, will create a unit with the following characteristics. piston engine is of: (global output = Thermal energy corresponding to the available shaft/power over the total thermal energy produced). ideal fuel/air mixture corresponding to a richness of 1 is obtained for a weight ratio of: