The bearing of tailshaft sealing equipment which adopts the oil nature circulation is hot, the reason is

A．the rotate speed fluctuation

B．the ventilation tube clogged

C．the main engine accelerate so fast

D．stormy waves

[单选题]The sealing rings are in four parts and pressed together around the piston rods by means of _____A．nutsB．boltsC．coil springsD．stuffing boxes

[单选题]The sealing rings are in four parts and pressed together around the piston rods by means of （）.A . nutsB . boltsC . coil springsD . stuffing boxe

[单选题]Sealing in pump shaft is achieved by means of the ( ).A．gasketB．packingC．o-ring

[单选题]As to the bearing, of the following, which statement is not true?（）A . ff overheat is found, the engine must be stopped for inspectionB . Much heat of the crankcase door indicates that the bearing is overheatedC . If bearing clearance is too large, k

[单选题]A． thrust bearing is used with a propulsion diesel engine to ____.A．control axial movement of the crankshaftB．transmit engine thrust to the propeller shaftC．absorb vibrations in the propeller shaftingD．prevent propeller thrust from being transmitted

[名词解释] 英译汉：bearing

[单选题]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 . acidsB . additivesC . heatD . gear

[单选题]The main bearing metal is a lining （）.A . inside the bearingB . outside the bearingC . covering the crankshaftD . none of the above

[单选题]The bearing shells depend on the accuracy of （） to held them in a truly circular shape.A . the gapB . the clearanceC . the boreD . the housing

[单选题]A thrust bearing is used with a propulsion diesel engine to （）.A . control axial movement of the crankshaftB . transmit engine thrust to the propeller shaftC . absorb vibrations in the propeller shaftingD . prevent propeller thrust from being transmi