Bearing
Bearing
相关考题：
The machine has stopped rotating because the bearing _____ the shaft.A.seizedB.cloggedC.meltedD.inserted
Risk of collision may exist ______.A.if the compass bearing of an approaching vessel does NOT appreciably changeB.even when an appreciable bearing change is evident, particularly when approaching a vessel at close rangeC.if you observe both sidelights of a vessel ahead for an extended period of timeD.All of the above
Shorter pulse lengths which may be repeated at a faster rate (higher pulse repetition frequency) on short ranges will give______at those ranges．A.Good Bearing discriminationB.Good Range discriminationC.Poor Bearing discriminationD.Poor Range discrimination
A compass card without north-seeking capability that is used for relative bearings is a（n）______．A.Bearing circleB.PelorusC.Bearing barD.Alidade
单选题Risk of collision exists when an approaching vessel has a(n)（）.Agenerally steady bearing and decreasing rangeBgenerally steady range and increasing bearingCincreasing range and bearingDdecreasing bearing only
单选题Risk of collision may be deemed to exist（）.Aif the compass bearing of an approaching vessel does not appreciably changeBeven when an appreciable bearing change is evident, particularly when approaching a vessel at close rangeCif you observe both sidelights of a vessel ahead for an extended period of timeDAll of the above
单选题As to the bearing, of the following, which statement is not true?（）Aff overheat is found, the engine must be stopped for inspectionBMuch heat of the crankcase door indicates that the bearing is overheatedCIf bearing clearance is too large, knocking will be heard in the crankcaseDIf bearing clearance is too large or too small, the white metal may be melted
单选题In the management of the shafting, because（） carry heavy load and caused high temperature easily, it should be paid attention.Athe bearing near to the diesel engineBthe intermediate bearing near to the thrust bearingCthe intermediate bearing near to the sterntubeDthe bearing located at the middle of the diesel engine and the sterntube
单选题In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a （） in the crankshaft to the bottom end bearing andthen up a connection rod to the gudgeon pin.Atelescopic pipesBlarge boreCdrilled passageDtied rod
单选题Shims of different thicknesses are inserted between the shells to enable adjustment of （）.Athe bearing clearancesBthe bearing thicknessCthe bearing strengthDthe bridge hardness
单选题Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）ADecreased connecting rod bearing clearanceBIncreased connecting rod bearing clearanceCDecreased compression ratioDIncreased compression ratio
单选题An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes?（）.ATheir bearing is almost constant，even when the true bearing of the contact changes appreciablyBThey always appear on a bearing of 90°from the true bearing of the contactCThe indirect echoes usually appear in shadow sectorsDWhen plotted，their movements are usually abnormal
单选题Risk of collision may exist（）.Aif the compass bearing of an approaching vessel does not appreciably changeBeven when an appreciable bearing change is evident, particularly when approaching a vessel at close rangeCif you observe both sidelights of a vessel ahead for an extended period of timeDAll of the above
单选题When the bearing becomes dry from lack of oil, the motor shaft may heat to （）an extent （） it welds itself to the bearing.Aeither；orBneither；norCsuch；thatDso；that
单选题The main bearing shells are made of steel with a lining of bearing metal which may be white metal, copper-lead or aluminum-tin alloy What is the meaning of “which” in the sentence above?（）Amain bearing shellsBmain bearingCsteelDbearing metal
单选题To guarantee that a reduction gear bearing is receiving proper oil supply, you should check the （）Alube oil temperature at the cooler outletBlube oil strainer magnets bearingClube oil temperatureDlube oil pressure to the bearing
单选题The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in （）Aincreased compression ratioBdecreased compression ratioCincreased bearing clearanceDdecreased bearing clearance
单选题To determine the main bearing clearance of a propulsion diesel engine, you should measure the main bearing shell using a ball anvil outside micrometer and measure the crankshaft journal using a/an （）AtelescopingBring ‘snap’ gaugeCinside vernier caliperDoutside micrometer
单选题While inspecting the main bearings on a diesel engine you find impregnated dirt and scratches in the bearing surface you would, therefore, suspect that （）Athe bearing had been overheatedBwater was present in the oilCthe lube oil was not being properly filteredDthe maximum allowable bearing pressure had been exceeded
单选题Lubricating oil used in a diesel engine serves to（）Areduce the wear of bearing surfacesBcool the bearing surfacesCassist in sealing bearing surfacesDall of the above
单选题Which of the following radar contacts will present the most immediate danger?（）.AA vessel on the starboard bow whose bearing is changing and range is decreasingBA vessel on the starboard bow whose bearing is steady and range is increasingCA vessel on the port bow whose bearing is steady and range is decreasingDA vessel on the port bow whose bearing is changing to the left and range decreasing