The energy conversion element for converting pressure energy into mechanical energy for driving working parts is ().
A. power element
B. actuator element
C. control element
D. auxiliary element
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The hydraulic components that can convert hydraulic energy to mechanical energy are ().
A. hydraulic pumps
B. hydraulic cylinders
C. check valve
D. relief valve
The power elements of the hydraulic system are ().
A. motor
B. hydraulic pump
C. hydraulic cylinder
D. hydraulic valve
Which of the following is used as a component in hydraulic power unit?
A. pressure gauge
B. filler gauge
C. pump
D. reservoir
Rotary motion in a hydraulic power unit is achieved by using
A. hydraulic cylinder
B. pneumatic cylinder
C. both hydraulic and pneumatic cylinder
D. none of the above
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