单项选择题
A full-flow 50μm filter is installed ,（） so the injection system components on the main engine are safeguarded.
A.as close to the main engine as possible
B.as close to the main pump as possible
C.just before the fuel valve
D.just before the booster pump
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相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
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
