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單項(xiàng)選擇題

When in operation, it is unavoidable that a small amount of oil （） through leakage, and in order to compensate for these leaks the system is connected to a feed pump.

A.escapes
B.overheats
C.expands
D.accelerates

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單項(xiàng)選擇題

For a L√Opurifier, if the back pressure of the oil outlet is too high, the interface between oil and water in the bowl will （）.

A.be interrupted
B.move downwards
C.move outwards
D.retain original position

單項(xiàng)選擇題

Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?（）

A.Height of the machine
B.Temperature of the liquid seal
C.Gravity disc
D.Bowl diameter