A．gasket
B．packing
C．o-ring
[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 bearing of tailshaft sealing equipment which adopts the oil nature circulation is hot, the reason isA．the rotate speed fluctuationB．the ventilation tube cloggedC．the main engine accelerate so fastD．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 boxe
[单选题]In the navigation,_______cause the shafting over load most easilyA．stopping the main engine suddenlyB．changing the main engine running direction suddenlyC．the sailing from the shallow water area to the deep water areaD．the ship's trim too much
[单选题]Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）.A . inside micrometerB . feeler gaugeC . adjustable trammelD . sighting device
[单选题]The projection on a shaft designed to change circular motion into up and down or back and fore motion is called （）.A . wheelB . crankshaftC . running gearD . cam
[单选题]The （） of the main shaft should be measured with a （）.A . clearance；calipersB . sinking；bridge gaugeC . diameter；bridge gaugeD . clearance；lead wire
[单选题]On opposite ends of a single shaft of a turboblower are a gas driven （）and a air compressor, which are sealed each other.A . charge air receiverB . scavenging air beltC . turbineD . air cooler
[单选题]Cooling of engine is achieved by circulation a cooling liquid around internal passages within the （）.A . boilerB . heaterC . engineD . cooler
[单选题]A wobbling tail shaft is an indication of（）.A . shallow waterB . an engine that is misfiringC . a tight tail shaft glandD . worn stern bearing or misalignment