3.11.11

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. 21. A pressure control relay in a hydraulic pump is.
Option A. energised to the run position.
Option B. used to prevent anything happening until there is hydraulic pressure.
Option C. de-energised to start the pump.



Question Number. 22. A constant delivery pump has its output varied with.
Option A. regulators.
Option B. gears.
Option C. servo pressure.



Question Number. 23. A variable angled pump starts at.
Option A. half way position.
Option B. minimum stroke.
Option C. maximum stroke.



Question Number. 24. A check flow valve in a hydraulic system prevents.
Option A. pump cavitation.
Option B. reverse flow.
Option C. overpressure.



Question Number. 25. A duplex seal consist of.
Option A. a square section rubber ring within a steel washer.
Option B. a hard rubber square section ring with a soft rubber square section inner ring.
Option C. a rubber 'T' section ring sandwiched between two Teflon rings.



Question Number. 26. When is an hydraulic de-pressurising valve energised?.
Option A. When selected on.
Option B. When there is sufficient hydraulic pressure available.
Option C. When selected off.



Question Number. 27. A fixed volume axial pump contains the following rotating parts.
Option A. Drive Shaft, Swash Plate & Valve Block.
Option B. Swash Plate & Valve Block.
Option C. Drive Shaft, Swash Plate & Cylinder Block.



Question Number. 28. An hydraulic closed system is one where.
Option A. pressure is maintained at the selector valves at all times.
Option B. there is no pressure at the selector valves when no functions are required.
Option C. most of the major components of the system are included in a self contained unit.


Question Number. 29. What constitutes a hydraulic power pack?.
Option A. Variable swashplate pump.
Option B. Reservoir, pump, selector valve, filter.
Option C. Hydraulic oil accumulator.



Question Number. 30. If an accumulator loses air pressure there will be.
Option A. rapid depressurisation of system.
Option B. pump cavitation.
Option C. rapid fluctuations of instruments.


ABOVE QUESTIONS WITH ANSWERS 

Question Number. 21. A pressure control relay in a hydraulic pump is.
Option A. energised to the run position.
Option B. used to prevent anything happening until there is hydraulic pressure.
Option C. de-energised to start the pump.
Correct Answer is. de-energised to start the pump.
Explanation. NIL.


Question Number. 22. A constant delivery pump has its output varied with.
Option A. regulators.
Option B. gears.
Option C. servo pressure.
Correct Answer is. regulators.
Explanation. Constant delivery is constant flow rate.


Question Number. 23. A variable angled pump starts at.
Option A. half way position.
Option B. minimum stroke.
Option C. maximum stroke.
Correct Answer is. maximum stroke.
Explanation. CAIPs AL/3-23.


Question Number. 24. A check flow valve in a hydraulic system prevents.
Option A. pump cavitation.
Option B. reverse flow.
Option C. overpressure.
Correct Answer is. reverse flow.
Explanation. NIL.


Question Number. 25. A duplex seal consist of.
Option A. a square section rubber ring within a steel washer.
Option B. a hard rubber square section ring with a soft rubber square section inner ring.
Option C. a rubber 'T' section ring sandwiched between two Teflon rings.
Correct Answer is. a rubber 'T' section ring sandwiched between two Teflon rings.
Explanation. NIL.


Question Number. 26. When is an hydraulic de-pressurising valve energised?.
Option A. When selected on.
Option B. When there is sufficient hydraulic pressure available.
Option C. When selected off.
Correct Answer is. When selected off.
Explanation. AL/3-21 4.2.


Question Number. 27. A fixed volume axial pump contains the following rotating parts.
Option A. Drive Shaft, Swash Plate & Valve Block.
Option B. Swash Plate & Valve Block.
Option C. Drive Shaft, Swash Plate & Cylinder Block.
Correct Answer is. Drive Shaft, Swash Plate & Cylinder Block.
Explanation. AL/3-21 Figure 2.


Question Number. 28. An hydraulic closed system is one where.
Option A. pressure is maintained at the selector valves at all times.
Option B. there is no pressure at the selector valves when no functions are required.
Option C. most of the major components of the system are included in a self contained unit.
Correct Answer is. pressure is maintained at the selector valves at all times.
Explanation. AL/3-21 12.1-12.3.

Question Number. 29. What constitutes a hydraulic power pack?.
Option A. Variable swashplate pump.
Option B. Reservoir, pump, selector valve, filter.
Option C. Hydraulic oil accumulator.
Correct Answer is. Reservoir, pump, selector valve, filter.
Explanation. Jeppeson A & P Technician Airframe P8-15


Question Number. 30. If an accumulator loses air pressure there will be.
Option A. rapid depressurisation of system.
Option B. pump cavitation.
Option C. rapid fluctuations of instruments.
Correct Answer is. rapid fluctuations of instruments.
Explanation. NIL.