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單項(xiàng)選擇題

The exhaust boilers are used to recover some of （） carried in the exhaust gas from the main engine.

A.water
B.oil
C.heat
D.steam

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單項(xiàng)選擇題

Impurities from the boiler water surface can be removed through the （）.

A.safety valve
B.blow down valve
C.scum valve
D.feed check valve

單項(xiàng)選擇題

All bilge suction must be fitted with suitable （）, which in the machinery space would be mud boxes positioned at floor-plate level for easy access.

A.strainers
B.valves
C.elements
D.separators