HYDRAULIC SYSTEM

Ex. 135. Read and translate these terms and word combinations.

Hydraulic; hydraulic systems; to power the following airplane systems; to lose pressure; to power all flight controls with no decrease in airplane controllability; fluid; fluid reservoir; wheel well area; to be pressurized by bleed air; pressurization and servicing; to be connected to; to ensure positive fluid flow to all hydraulic pumps; hydraulic power distribution; flight controls; leading edge slats; trailing edge flaps; landing gear; wheel brakes; nose wheel steering; thrust reversers; autopilots; system components; an engine-driven pump; an AC electric motor-driven pump; fluid volume; to position the switch to OFF; to isolate fluid flow from the system components; to control the engine-driven pump output pressure; to deactivate the related light; to detect an overheat in the system; to result in an intermittent LOW PRESSURE light; the remaining pump; pump output line; to be used for cooling and lubrication of the pumps; a leak developed in the engine-driven pump or its related lines; a heat exchanger; the reservoir quantity; the related system pressure transmitter; to prevent a total system fluid loss; fluid remaining in the system reservoir; to affect the operation of the standby hydraulic system; to supply the additional volume of hydraulic fluid needed to operate the autoslats and leading edge flaps and slats at the normal rate; the existing conditions; to be provided as a backup if system A and / or B pressure is lost; to activate manually or automatically; pressure switches; check valve; to drop below a limit value; to position landing gear lever UP / DN; to arm the ALTERNATE FLAPS position switch; to initiate automatic operation; approximately half empty; the related hydraulic SYSTEM PRESSURE indication; the system B reservoir FLUID LEVEL indication; to become pressurized after engine start; hydraulic fluid used to cool and lubricate the corresponding electric motor-driven pump; to remove electrical power from pump; during long periods of cruise; to de-energize blocking valve in pump to allow pump pressure to enter system; based on the position of the display select panel selector; to

energize blocking valve to block pump output; to remain ON at shutdown to prolong solenoid life; to indicate digital percentage of hydraulic quantity; to select standby pump operation; to activate automatic standby function, solenoid.

Ex. 136. Remember these abbreviations.

Ex. 137. Insert prepositions where necessary.

1.Either A or B hydraulic system can power all flight controls . . . . . no decrease . . . . . airplane controllability. Each hydraulic system has a fluid reservoir located . . . . . the main wheel well area. System A and B reservoirs are pressurized

. . . . . bleed air. The standby system reservoir is connected . . . . . the system B reservoir . . . . . pressurization and servicing. Pressurization of all reservoirs ensures positive fluid flow . . . . . all hydraulic pumps.

2.Positioning the switch . . . . . OFF isolates fluid flow . . . . . the system components. However, the engine-driven pump continues to rotate as long as the engine is operating. Pulling the engine fire warning switch shuts . . . . . the fluid flow . . . . . the engine-driven pump and deactivates the related LOW PRESSURE light.

3. Hydraulic fluid used . . . . . cooling and lubrication . . . . . the pumps passes . . . . .

a heat exchanger before returning . . . . . the reservoir. The heat exchanger . . . . .

system A is located . . . . . main fuel tank No. 1 and for system B is . . . . . main fuel tank No. 2. Pressure switches, located . . . . . the engine-driven and electric motordriven pump output lines, send signals to illuminate the related LOW PRESSURE light if pump output pressure is low. A check valve, located . . . . . each output line, isolates the related pump . . . . . the system. The related system pressure transmitter sends the combined pressure . . . . . the engine-driven and electric motor-driven pump . . . . . the related hydraulic system pressure indication.

4. If the hydraulic system is not properly pressurized, foaming can occur . . . . .

higher altitudes. Foaming can be recognized . . . . . pressure fluctuations and the blinking of the related LOW PRESSURE lights.

5. Valid only when airplane is . . . . . ground with both engines shutdown or . . . . .

landing with flaps . . . . . . . . . . taxi-in.

6. These variations have little effect . . . . . systems operation.

Ex. 138. Think of antonyms.

Input pressure – . . . . . . . . . .; fluid – . . . . . . . . . .; to isolate – . . . . . . . . . .; decrease – . . . . . . . . . .; pressurization – . . . . . . . . . .; standby system – . . . . . . . . . .; reverse thrust – . . . . . . . . . .; deactivate – . . . . . . . . . .; loss – . . . . . . . . . .; to continue – . . . . . . . . . .; to energize – . . . . . . . . . .; transmitter – . . . . . . . . . .; positive – . . . . . . . . . .; leading edge – . . . . . . . . . .; after – . . . . . . . . . .; to shut off the fluid flow – . . . . . . . . . .; normal brakes – . . . . . . . . . .; steady decrease – . . . . . . . . . .; to raise the landing gear – . . . . . . . . . .; o illuminate – . . . . . . . . . .; to initiate – . . . . . . . . . .; empty – . . . . . . . . . .; engine start – . . . . . . . . . .; to cool – . . . . . . . . . .; to blink – . . . . . . . . . .; digital – . . . . . . . . . .; flaps extended – . . . . . . . . . .; available – . . . . . . . . . .; upper – . . . . . . . . . .; normal operation – . . . . . . . . . .; top – . . . . . . . . . .; proper – . . . . . . . . . .; open – . . . . . . . . . ..

Ex. 139. Think of synonyms.

Backup – . . . . . . . . . .; sufficient – . . . . . . . . . .; component – . . . . . . . . . .; to feed – . . . . . . . . .; reservoir – . . . . . . . . .; fluid – . . . . . . . . .; additional – . . . . . . . . .; related – . . . . . . . . .; to power the hydraulic system – . . . . . . . . . .; single – . . . . . . . . .; long period – . . . . . . . . . .; to ensure – . . . . . . . . . .; to position – . . . . . . . . . ..

Ex. 140. Write nouns for these verbs. Underline those which do not change.

To distribute – . . . . . . . . . .; to pressurize – . . . . . . . . . .; to locate – . . . . . . . . . .; to connect – . . . . . . . . . .; to lose – . . . . . . . . . .; to power – . . . . . . . . . .; to activate – . . . . . . . . . .; to position – . . . . . . . . . .; to transmit – . . . . . . . . . .; to extend – . . . . . . . . . .; to vary – . . . . . . . . .; to relate – . . . . . . . . .; to use . . . . . . . . .; to detect – . . . . . . . . . .; to illuminate – . . . . . . . . . .; to drop – . . . . . . . . . .; to extinguish – . . . . . . . . . .; to lubricate – . . . . . . . . . .; to supply – . . . . . . . . . .; to operate – . . . . . . . . . .; to develop – . . . . . . . . . .; to isolate – . . . . . . . . . .; to display – . . . . . . . . . .; to rotate – . . . . . . . . . .; to read – . . . . . . . . . .; to select – . . . . . . . . . .; to indicate – . . . . . . . . . ..

Ex. 141. Decode these abbreviations.

The FLT CONT and HYD system annunciator lights; the ENG 1 (system A) or ENG 2 (system B) pump ON / OFF switch; the related LOW PRESSURE light; OVERHEAT light; the ELEC 2 (system A) or ELEC 1 (system B) pump ON / OFF switch; engine RPM; the STBY RUD ON light; landing gear lever UP / DN; the ALTERNATE FLAPS position switch; the LOW QUANTITY light; MFD SYSTEM (SYS) switch; REFILL Indication (RF); PTU.

REMEMBER