9-32.9-33.9-34.9-35.9-36.9-37.What is the recommended method forlocating small internal leaks inhydraulic systems?1.Use magnetic flux2.Install pressure gages3.Listen for identifying sounds4.Visually inspect the disassembledpartsQuestion 9-33 is to be judged True orFalse.The most frequent symptom of trouble in ahydraulic system is indicated by unusualnoise.A popping or sputtering noise in ahydraulic system indicates which of thefollowing conditions?1.Oil leak in the pressure line2.Air leak in the pressure line3.Air leak in the suction line4.Air pocket in the cylinderWhich of the following conditions shouldyou suspect if a pounding or rattlingnoise occurs in a hydraulic system?1.Overtight adjustment of parts2.Defective spring-activated valve3.Improperly adjusted relief valve4.Overloaded system or high-speedoperationForeign matter in the oil of a hydraulictransmission usually causes which of thefollowing types of noises?1.Rattling2.Popping3.Squealing4.GrindingWhen a squealing or squeaking noiseoccurs in a hydraulic system, it isusually caused by which of the followingconditions?1.Wiped bearings2.Air pocket in the cylinder3.Overtight packing around moving parts4.Overloaded system during high-speedoperation9-38.What should an Engineman do if a faultyoperation of a circuit breaker isdiscovered?1.Repair the circuit breaker2.Check for excessive binding in theelectric motor3.Replace any damaged equipment in thelines4.Report the condition to theElectrician's Mate9-39.If a hydraulic system is left idle forlong periods of time, which of thefollowing difficulties may be expected todevelop?9-40.9-41.1.Misalignment of linkage2.Accumulation of sludge3.External leakage4.Internal leakageEvidence of which of the followingforeign substances in the oil of ahydraulic system calls for draining theoil, cleaning the system, and filling itwith clean oil?1.Water2.Sludge3.Acid4.Each of the aboveWhat is the purpose of securing ahydraulic system for 1 hour after fillingit with flushing oil?1.To permit the settling of foreignmatter2.To dissolve sludge3.To permit the venting of air4.To dissolve corrosive deposits9-42.Which of the following actions is part ofthe procedure for cleaning a hydraulicsystem?1.Allow the system to remain idle for15 minutes after operating it with alight load for 4 minutes2.Operate the system for an hour whileit is filled with cleaning fluid3.Operate the system at high pressurewhile it is filled with cleaningfluid4.Dilute the old hydraulic oil withcleaning fluid and operate the systemfor 15 minutes, then allow the systemto remain idle for about 5 minutes58
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