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單項(xiàng)選擇題

In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

A.a service tank
B.a collecting tank
C.a sump
D.a settling tank

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單項(xiàng)選擇題

In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to （）.

A.the outlet of oil
B.the outlet of water
C.the bowl periphery
D.the center of bowl

單項(xiàng)選擇題

In a purifier changing to a gravity disc with larger hole diameter will move the interface towards the （）.

A.bowl periphery
B.bowl center
C.upper surface
D.lower surface

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