單項選擇題

The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）

A.centrifugal separators; the engine cylinder
B.oily water separators; the engine cylinder
C.oily water separators; the fuel supply system
D.centrifuges; the fuel supply system

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單項選擇題

When the heavy fuel oil is heated to achieve the viscosity of 10-15 cst, may occur.To avoid this, a system is used in most occasions（）

A.boiling and cavitations; low temperature
B.boiling and cavitations; pressurized
C.leaking and boiling; low temperature
D.leaking and boiling; pressurized

單項選擇題

In order to improve the working conditions of the crosshead bearings, the bearing pressure is made and the peripheral speed is made in later designs（）

A.smaller, higher
B.higher, smaller
C.smaller, smaller
D.higher, higher