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單項(xiàng)選擇題

Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）

A.increased fuel consumption
B.increased feed water consumption
C.fuel pump failure
D.combustion control system failure

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單項(xiàng)選擇題

Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）

A.Injection pressures
B.Control air supply pressure
C.Cooling water flow through after-coolers
D.Lube oil temperature

單項(xiàng)選擇題

The procedures recommended for auxiliary boilers having high salinity include （）.

A.treating with oxygen scavengers
B.securing the boiler and giving it a blowing down
C.increasing the pH
D.reducing the phosphate level

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