1-63.1-64.1-65.1-66.1-67.1-68.Before opening a main reduction gear(MRG) cover, you should take allEXCEPT which of the followingprecautions?1.Drain the LO sump2.Post a security watch3.Clean the areas around thecovers4.Obtain the chief engineer’spermissionBacklash is best described by whichof the following statements?1.Clearance of the gears that donot mesh2.Clearance of the gears operatingin parallel3.Play between the surfaces of theteeth in mesh4.Radial play between the pinionteeth and bearingsWhen pinion and gear teeth have beenslightly indented by foreignmaterial, what action should youtake?1.Closely monitor the damage tosee if it spreads2.Remove both gears for a completeoverhaul3.Remove the raised metal on thedamaged teeth4.Remove the raised metal on bothgearsWhen performing a static check todetermine tooth contact, you shoulduse which of the following compoundsto coat the gear teeth?1.An indelible marker2.Copper sulfate3.Persian blue4.Prussian blueCorrective pitting along the pitchline may occur during which of thefollowing periods of service?1.During full-power operation2.During prolonged operation3.During the first few months ofoperation4.During excessive operation atlow powerWhen determining offset alignmentreadings, manufacturers take intoaccount all EXCEPT which of thefollowing factors?1.Speed of the installation2.Thermal expansion of the MRG3.The hydrodynamic oil film effect4.Thermal expansion of thefoundation1-69.The line shaft (spring) bearing(LSB) used on gas turbine ships iswhat type of bearing?1.Prealigned, self-lubricatedbearing2.Nonaligned, pressure lubricatedbearing3.Self-aligning, oil-lubricatedroller bearing4.Self-aligning, oil-lubricatedjournal bearing1-70.On the LSB, where are the originalinstallation clearance readingslocated?1.On the lower bearing housing2.On the upper bearing housing3.On the base support4.On the side cover1-71.How are the stern tube and struttube bearings cooled?1.By heat-dissipating fins2.By air from the masker airsystem3.By fresh water4.By seawater1-72.The temperature-compensated pitchindicating system depends on thethermal stability of which of thefollowing transmitting mediums tosense pitch position?1.Seawater2.Prairie air3.Masker air4.CRP oil1-73.The electronic pitch positiontransducer is located in what area?1.Inside the CRP electronicsenclosure2.On the right side of the OD box3.On the front end of the OD box4.Inside the propeller hub1-74.A steady increase in hubservopressure, without a change insystem demands, is a good indicationthat which of the followingcomponents is faulty?1.Auxiliary relief valve2.Sequencing valve (closedposition)3.Reducing valve4.Electrohydraulic servo valve6
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