A viscosity regulator used for an engine is usually provided in order to （） for an engine burning heavy fuel oil.
- Aregulate the fuel supply
- Bmaintain a constant fuel viscosity at the fuel valves
- Cmaintain efficient cooling
- Dalter the fuel density
问题
A viscosity regulator used for an engi
参考解析：
分类：船舶电气与船舶安全题库
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