单项选择题

Air trapped in the hydraulic fluid of a steering system should be indicated by （）.

A.the pump over-speeding
B.an improper rudder response
C.bubbles in the sight glass
D.ram relief valves lifting

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单项选择题

A.smoother pump operation
B.overheating of the bearing
C.reduced corrosion in the bearing
D.increased pump capacity

单项选择题

A.kinetic energy
B.potential energy
C.mechanical energy
D.thermal energy

单项选择题

A.vaporizes in the condenser
B.reaches the compressor through the suction line
C.flashes in the liquid line
D.condenses in the receiver