The INMARSAT system is open for use by

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 （） engine is used for alternators

The （） engine is used for alternators and sometimes for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.Afour-strokeBtwo-strokeCslow speedDreversible

3、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

4、By using（）system a ship can send a dis

By using（）system a ship can send a distress message and know with certainty it will be received.ACOSPAS-SARSATBSATELLITECterrestrial radioDINMARSAT

5、● The Internet is an open system, and

● The Internet is an open system, and most information is available to everyone. It is very important to add (74) to existing system for protecting the secret information.(74)A Web pagesB modemC securityD network

6、Fresh water is used for the cooling of

Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.Acylinder coversBlubricating spaceCcrossheadDexhaust manifold