A.Lower fuel consumption
B.Better balanced cylinder power
C.A shorter overhaul period
D.Less smoke emission
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A.too low
B.a little lower
C.a little higher
D.exactly the same
A.a little lower
B.a little higher
C.too low
D.exactly the same
A.control fuel injection time more precisely
B.control fuel injection rate more precisely
C.meet the environmental requirements
D.meet high engine speed requirements
A.big size
B.fuel economy
C.low speed
D.high power
A.at high speed and full load
B.at low speed and part load
C.when heavy fuel oil is used at sea
D.when the ships run long distance
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The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the()
The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
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Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()
()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
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()connectors hold best if a wire is accidentally pulled or a connection becomes loose.
Using a file without a handle may result in ()
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