Such an engine frame helps （） the engine and so protect the bearings from the deformation forces transmitted via the ships double bottom.

[单选题]Bedplates are the （） of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.A . hullB . projectionC . graphitizationD . foundatio

[单选题]_____ the engines, the diesel engine is ____ used engine on boardA．Between / more commonlyB．Among / the most commonlyC．Between / not more commonlyD．Among / not the most commonly

[单选题]With the crank in position in the engine, some measurements can be taken by a special bridge gauge and （）.A . a micrometerB . a bowlC . a feeler gaugeD . a wrench

[单选题]The mechanical efficiency of an engine （） because losses occur in the form of friction.A . is always less than 100%B . is always more than 100%C . is always equal to 90%D . is always less than 90%

[单选题]The heart of the diesel engine is the （） where the fuel is burnt and the power developed.A . crankcaseB . cylinderC . scavenge boxD . pisto

[单选题]The diesel engine is a type of （）.A . turbine engineB . gas turbineC . steam engineD . internal combustion engine

[单选题]The governor of a generator engine is to （）.A . make the engine stopB . regulate the timing of camshaftsC . make the rpm stabilize at any required valueD . make the engine run at nearly constant speed

[单选题]“The engine not obtaining the sufficient speed for firing” means that （）.A . the start failsB . the fuel pumps will be put into operationC . the fuel valves are damagedD . the combustion process will take over

[单选题]“Stand by engine” means （）.A . prepare to stop the engineB . assemble an engine on its bedplateC . make an engine ready for startingD . make an engine run steadily

[单选题]In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.A . pressure chargedB . naturally aspiratedC . contaminatedD . high speed diesel