單項選擇題The oil sump, a light welded design, is mounted on the engine block from below and sealed by （）
A.O-ring
B.gasket
C.washer
D.packing
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1.單項選擇題The air required for combustion is taken from the engine room through a filter fitted on the turbochargerThis reduces the risk for too and contamination of the combustion air（）
A.high temperatures
B.low temperatures
C.wet
D.dirty
2.單項選擇題Engines, which are to be run in parallel have governors specially adapted for the same（）, about 4% to obtain basic load sharing.
A.speed settings
B.speed droops
C.speed drops
D.speed changes
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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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Which of the following items don’t belong to dock repair works?（）
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