题目内容

In hydraulic transmission, in the international system of units, the unit of pressure is ().

A. Pa
B. N
C. w
D. Nm

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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

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