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單項選擇題

The main generators are connected to（）.

A.distribution boards
B.section boards
C.emergency switch boards
D.main switch boards

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單項選擇題

UMS stands for（）.

A.ultra much space
B.universal medium system
C.unit machined space
D.unattended machinery space

單項選擇題

Oil mist detectors are usually used on board to detect oil mist density within （）.

A.the engine crankcase
B.the engine scavenge boxes
C.drain tanks
D.fuel tanks

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