Flexible hose under pressure in a hydraulic system will （）.

Air trapped in the hydraulic fluid of a steering system may be indicated by

A.the steering pumps overspeeding

B.a jammed open relief valve

C.a constantly occurring improper rudder response

D.excessive ram pressure

Before performing any maintenance on a hydraulic system storing energy in an accumulator, you should

A.pressurize the system to test for leaks

B.bleed off all pressure within the system

C.operate the machine until it reaches normal temperature

D.disconnect the pump pressure control switch

Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?

A.Pressure-reducing valve

B.Unloading valve

C.Counterbalance valve

D.Pressure-relief valve

A hydraulic accumulator aboard a ship is designed to ______.

A.store fluid under pressure

B.act as a fluid reservoir

C.provide overpressure relief

D.replenish fluid to a system

After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?

A.The relief valves in the system should be readjusted

B.The filters and strainers should be checked frequently

C.All system pressure should be readjusted

D.The system should be drained and renewed with a fluid of different operating characteristics

Pressure drop in an operating hydraulic system is developed ______.

A.only by the pump as its primary function

B.by resistance to the fluid flow through the system

C.by the thermal input to the system's fluid

D.solely(单独地) by the charge applied by the accumulators

If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to prevent

A.failure of the hydraulic hose

B.excessive flow through the line

C.friction in other areas of the hydraulic system

D.overheating of the hydraulic fluid