The bearings used to support the crankshaft are generally called （）

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• The oil quantity for bearing lubrication should be applied in such an amount as to be sufficient to carry away the （） caused by the friction at the bearings.

  A . acids B . additives C . heat D . gear

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• As to the bearing, of the following, which statement is not true?（）

  A . ff overheat is found, the engine must be stopped for inspection B . Much heat of the crankcase door indicates that the bearing is overheated C . If bearing clearance is too large, knocking will be heard in the crankcase D . If bearing clearance is too large or too small, the white metal may be melted

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• When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.

  A . the meridian through the object of the bearing B . the meridian through the ship's position C . the meridian midway between the ship and the object D . any meridia

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• On chart，bearings to near objects should be used in preference to objects farther off，because（）.

  A . a small error in bearing or in laying it down on the chart has a greater effect in misplacing the position the longer the line to be drawn B . all scales are kept updated for vital information by Notices to Mariners C . the larger the scale of the chart，the greater the detail that can be shown on it D . the mariner using the medium scale charts for passage along a coast need not transfer on to a large scale for short distance

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• To obtain accuracy in fixing by DF cross bearings，（）should be used.

  A . two stations，including one on the nearest coast B . two stations，including one on the nearer coast C . three stations，including one on the farthest coast D . three stations，including one on the nearest coast

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• An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the （）.

  A . propeller hub B . lignum vitae C . shaft packing D . labyrinth seal

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• In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to the （）.

  A . crosshead B . crankpin C . crank journal D . gudgeon pi

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• The most crucial time for any bearing with regards to lubrication is （）

  A . during low loads B . after proper oil viscosity is reached C . during starting D . after cleaning filter

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• An acceptable method of measuring for the correct rotational force applied to the connecting rod and main bearing bolts, is to use a（）

  A . torque wrench B . monkey wrench C . pipe wrench D . slugging wrench

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• Which of the following methods is normally used to lubricate bearings in a small high-speed diesel engine?（）

  A . Splash lubrication B . Pressure lubrication C . Sight feed lubricators D . Mechanical lubricator

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• （）is an equipment used to detect the presence of ships ,buoys,coast and many other targels and to obtain range and bearing of these targets.

  A . The marine sextant B . The chronometer C . The echo sounder D . The radar

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• You are running parallel to the coast and take a running fix using bearings of the same object.If you are making less speed than used for the running fix，in relation to the position indicated by the fix，you will be（）.

  A . Closer to the coast B . Farther from the coast C . On the track line ahead of the fix D . On the track line behind the fix

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• In some modern large diesel engines, which of the following is used as the support for the main bearings?（）

  A . Bedplate B . Block C . Base D . Sum

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• The highest loads applied to the diesel engine crankshaft main bearings are （）

  A . axial loads B . firing loads C . inertia loads D . centripetal load

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• You have calibrated your RDF. When compiling the calibration table，the correction to be applied to any future RDF bearings is listed against the（）.

  A . true bearing of the transmitter B . relative bearing of the transmitter C . heading of the vessel D . time of receptio

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• 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.

  A . telescopic pipes B . large bore C . drilled passage D . tied rod

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• A thrust bearing is used with a propulsion diesel engine to （）.

  A . control axial movement of the crankshaft B . transmit engine thrust to the propeller shaft C . absorb vibrations in the propeller shafting D . prevent propeller thrust from being transmitted to the hul

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• You are running parallel to the coast and estimate that the current is against you.In plotting a running fix using bearings from the same object on the coast，the greatest safety margin from inshore dangers will result if what speed is used to determine（）.

  A . Minimum speed estimate B . Maximum speed estimate C . Average speed estimate D . A running fix should not be used under these conditio

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• In order to improve the working conditions of the crosshead bearings, the bearing pressure is made and the peripheral speed is made in later designs（）

  A . smaller, higher B . higher, smaller C . smaller, smaller D . higher, higher

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• The bearing shells depend on the accuracy of （） to held them in a truly circular shape.

  A . the gap B . the clearance C . the bore D . the housing

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• 2. Which of the following is used to monitor the bearing of a radar target in relation to your location?

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• The ice is not thick enough to bear the weigh of a tank．

  A．suffer B．accept C．receive D．endure

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• 若汇票收款人一栏内写明“pay to the order of bear”则该汇票（）

  A．不可流通转让； B．可以经背书转让； C．无须背书，即可流通转让； D．由出票人决定是否可以转让

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• The present crisis bears some ________（similar） to the oil erisis of the 1970s

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