單項(xiàng)選擇題Main diesel engine control can be obtained by the bridge （）

A.at any time
B.only after the engine room control station is switched to ‘bridge control’
C.whenever the secondary station is switched to ‘bridge control’
D.whenever the engine side control station is switched to ‘bridge control’


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1.單項(xiàng)選擇題The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）

A.one half crankshaft speed in a two-stroke cycle diesel engine
B.crankshaft speed in a two-stroke cycle diesel engine
C.two times crankshaft speed in a two-stroke cycle diesel engine
D.one-fourth times crankshaft speed in a four-stroke cycle diesel engine

2.單項(xiàng)選擇題The abbreviation ‘M/E’ is used to represent the（）

A.measure equipment
B.main electrical
C.my engine
D.main engine

5.單項(xiàng)選擇題Modern centrifuge designs enable continuous over a considerable period of timeThis is achieved by which is timed to discharge the sludge at regular intervals（）

A.an injection process
B.an ejection process
C.a separation process
D.a heating process