A _____________ provides oil to make up for system leakage, allows space for the expansion or contraction of the oil with changes of temperature, enables gas bubbles to rise out of the oil and dirt particles to sink to the bottom, and allows room for heat dissipation or for the inclusion of thermal control devices.
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The swash plate axial piston pump changes the flow by changing__________. ()
A. speed
B. cylinder body swing angle
C. floating ring eccentricity
D. swash plate inclination angle
Piston pump is generally used in _______system. ()
A. high pressure
B. medium pressure
C. low pressure
D. none of above
What is the difference between vane pump and radial piston pump?
A. in radial piston pump, radial slots in vane pumps are replaced by radial bores which accommodate pistons
B. in radial piston pump, radial slots in vane pumps are replaced by radial bores which accommodate swash plate
C. in radial piston pump, radial slots in vane pumps are replaced by radial bores which accommodate both swash plate and pistons
D. none of the above
How many strokes does a single piston pump need to discharge oil?
A. one stroke
B. two strokes
C. three strokes
D. none of the above
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