The following items will test your grasp of the material covered in this lesson. There is only one correct
answer for each item. When you have completed the exercise, check your answers with the answer key
that follows. If you answer any item incorrectly, study again that part of the lesson which contains the
The pistons and cylinder block rotate at what RPM?
___ A. The same.
___ B. 500 RPM.
___ C. 750 RPM.
___ D. 1500 RPM.
How many types of hydraulic reservoirs are there?
___ A. One.
___ B. Two.
___ C. Three.
___ D. Four.
The stationary-cam pump is NOT used on what three Army aircraft?
___ A. UH-1H, AH-1S, and OV-1B.
___ B. UH-1D, AH-1H, and OV-1.
___ C. OV-1A, AH-1G, and UH-1E.
___ D. OV-1, AH-1G, and UH-1C.
What type of pump is often used in Army aviation?
___ A. Piston pump.
___ B. Rotating-cam pump.
___ C. Demand-principle compensator pump.
___ D. Rotating-compensator pump.
What is used to control piston-to-bore leakage in piston pumps?
___ A. Wiper rings.
___ B. O-rings.
___ C. Seals.
___ D. Close machining.