1.11.11

NOTE

TO CHECK YOUR PREPARATION ,PLZ WRITE DOWN YOUR SELECTED OPTIONS (A,B,C) ON ROUGH PAGE AND  AT THE END OF QUIZ , VERIFY YOUR SELECTED OPTIONS WITH THE CORRECT OPTIONS GIVEN BELOW

Question Number. 1. A purpose of a 'cut-out' in a hydraulic system.
Option A. is to prevent creep in jack operated services which have several selected positions.
Option B. is to limit loss of fluid in the event of pipe fracture.
Option C. is to relieve the pump of load when the operation of services is complete and the accumulator charged with fluid.



Question Number. 2. Hydraulic pressure can be restored by.
Option A. compressing the air charge in an accumulator.
Option B. the use of a pressure/heat exchanger.
Option C. compressing the fluid in a reservoir.



Question Number. 3. What is the colour of the band on a hydraulic seal?.
Option A. Yellow.
Option B. Green.
Option C. White.



Question Number. 4. A maintainer valve in an hydraulic system will.
Option A. allow continued press to essential systems during times of reduced supply.
Option B. dampen pressure inputs.
Option C. maintain a high pressure to all systems.



Question Number. 5. Where is the temperature overheat switch located in a hydraulic pump?.
Option A. In the pressure line.
Option B. In the suction line.
Option C. In the case drain.



Question Number. 6. What happens if a component has an internal hydraulic leak?.
Option A. Fluid loss.
Option B. Increase in fluid pressure.
Option C. Increase in fluid temperature.


Question Number. 7. What happens to hydraulic fluid when it is overheated?.
Option A. Increase acidity.
Option B. Increase viscosity.
Option C. Increase alkalinity.


Question Number. 8. How is the hydraulic pump depressurising solenoid actuated?.
Option A. Energised both open and closed depending on cockpit selection.
Option B. Energised Open.
Option C. Energised Closed for fail-safe.


Question Number. 9. How do you prevent hydraulic fluid frothing?.
Option A. By pressurising.
Option B. Vent Reservoir to atmosphere.
Option C. Pass over a tray.


Question Number. 10. Accumulators as fitted to aircraft hydraulic systems.
Option A. are only ever used in an emergency.
Option B. store fluid under pressure.
Option C. provide additional fluid if leaks occur.


ABOVE QUESTIONS WITH ANSWERS 

Question Number. 1. A purpose of a 'cut-out' in a hydraulic system.
Option A. is to prevent creep in jack operated services which have several selected positions.
Option B. is to limit loss of fluid in the event of pipe fracture.
Option C. is to relieve the pump of load when the operation of services is complete and the accumulator charged with fluid.
Correct Answer is. is to relieve the pump of load when the operation of services is complete and the accumulator charged with fluid.
Explanation. CAIPs AL/3-21 5.2.


Question Number. 2. Hydraulic pressure can be restored by.
Option A. compressing the air charge in an accumulator.
Option B. the use of a pressure/heat exchanger.
Option C. compressing the fluid in a reservoir.
Correct Answer is. compressing the air charge in an accumulator.
Explanation. CAIPs AL/3-21 Para 7.


Question Number. 3. What is the colour of the band on a hydraulic seal?.
Option A. Yellow.
Option B. Green.
Option C. White.
Correct Answer is. Green.
Explanation. Jeppesen A&P Technician Airframe Textbook Page 8-44.


Question Number. 4. A maintainer valve in an hydraulic system will.
Option A. allow continued press to essential systems during times of reduced supply.
Option B. dampen pressure inputs.
Option C. maintain a high pressure to all systems.
Correct Answer is. allow continued press to essential systems during times of reduced supply.
Explanation. Jeppesen A&P Technician Airframe Textbook Page 8-31 Also known as priority valves CAIPs AL/3-21 5.3.


Question Number. 5. Where is the temperature overheat switch located in a hydraulic pump?.
Option A. In the pressure line.
Option B. In the suction line.
Option C. In the case drain.
Correct Answer is. In the case drain.
Explanation. Jeppesen Transport Category Aircraft Systems 7-10 and 7-8.


Question Number. 6. What happens if a component has an internal hydraulic leak?.
Option A. Fluid loss.
Option B. Increase in fluid pressure.
Option C. Increase in fluid temperature.
Correct Answer is. Increase in fluid temperature.
Explanation. Increase in temperature is an indication of internal leaks.

Question Number. 7. What happens to hydraulic fluid when it is overheated?.
Option A. Increase acidity.
Option B. Increase viscosity.
Option C. Increase alkalinity.
Correct Answer is. Increase acidity.
Explanation. Hi acidity is a common problem revealed after an oil system analysis.

Question Number. 8. How is the hydraulic pump depressurising solenoid actuated?.
Option A. Energised both open and closed depending on cockpit selection.
Option B. Energised Open.
Option C. Energised Closed for fail-safe.
Correct Answer is. Energised Closed for fail-safe.
Explanation. The depressurising valve (sometimes called an 'offloading valve') is energised closed, to fail-safe open.

Question Number. 9. How do you prevent hydraulic fluid frothing?.
Option A. By pressurising.
Option B. Vent Reservoir to atmosphere.
Option C. Pass over a tray.
Correct Answer is. By pressurising.
Explanation. Jeppesen A&P Technician Airframe Textbook 8-16.

Question Number. 10. Accumulators as fitted to aircraft hydraulic systems.
Option A. are only ever used in an emergency.
Option B. store fluid under pressure.
Option C. provide additional fluid if leaks occur.
Correct Answer is. store fluid under pressure.
Explanation. CAIPs AL/3-21 Para 7.