题目内容

Which one can realize wide range continuous variable tansmission during operation? ()

A. mechanical transmission
B. electric drive
C. pneumatic transmission
D. hydraulic transmission

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In hydraulic transmission, the ___________ of the hydraulic cylinder is determined by input flow rate. ()

A. pressure
B. load
C. speed
D. displacement

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

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

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