An electric heater built into some smaller diesel engines is used to （）.<br>A:raise lube oil viscosity for easier starting in cold weather<br>B:increase air inlet temperature<br>C:increase compression ratio<br>D:increase jacket water temperature for easier starting in cold weather

An electric heater built into some smaller diesel engines is used to （）.
A:raise lube oil viscosity for easier starting in cold weather
B:increase air inlet temperature
C:increase compression ratio
D:increase jacket water temperature for easier starting in cold weather

出自：海船船员证

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