The expenses for such work done by ste

1、By far the greatest use is for diesel

By far the greatest use is for diesel engine starting using air pressure of 25 bar or more provided by （）.Arotary compressorsBreciprocating compressorsCcentrifugal compressorsDscrew compressor

2、The ratio of the work done by the mac

The ratio of the work done by the machine______________the work done on it is called the efficiency of the machine.AagainstBwithCtoDfor

3、The safe working load for the assemble

The safe working load for the assembled cargo gear and the minimum angle to the horizontal for which the gear is designed shall be marked on the（）.AdeckBhead of the boomCheel of the boomDmast or king post

4、By which of the following means is for

By which of the following means is force efficiently provided to vary the pitch of the blades on a modem controllable pitch propeller?（）AHydraulicBMechanicalCPneumaticDElectrical

5、The expenses for the loading of trucks

The expenses for the loading of trucks and heavy cargo and the necessary materials for lashing thereof will be charged to（）account.Athe supercargo'sBthe shipper'sCthe shipowner'sDcarrier'

6、The work（）by the time you get there.

The work（）by the time you get there.Awill have been doneBwas doneChad been doneDhas done