单项选择题

Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）

A.Constant pressure system
B.Variable pressure system
C.Variable displacement system
D.Constant volume system

相关考题

It is important with all hydraulic systems to ensure th...

单项选择题It is important with all hydraulic systems to ensure that interlocking arrangements provided for pump or motor control levers are （） before the pump driving motor can be started.

A.in the pert position
B.in the starboard position
C.in the neutral position
D.to be dismantled

Overload protection on hydraulic system is provided by ...

单项选择题Overload protection on hydraulic system is provided by the use of （）.

A.stop valves
B.pressure relief valves
C.balance valves
D.regulating speed valves

The most common forms of main drive used on deck auxili...

单项选择题The most common forms of main drive used on deck auxiliaries are （）.

A.steam plants, electric motors and compressed air
B.diesel engine, hydraulic machinery and compressed air
C.steam plants, electric motors and hydraulic machinery
D.diesel engines, steam plants and hydraulic machinery

船舶电气与船舶安全

Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）