When checking the cylinder jacket water cooling expansion tank level on a main propulsion diesel engine on your towing vessel while underway on a coast-wise voyage, what should be the expansion tank level?

Question

Accepted Answer

The level should be in the upper part of the sight glass when the engine is at operating temperature.

Answer

The level should be out of sight high in the sight glass when the engine is at operating temperature.

Answer

The level should be in the lower part of the sight glass when the engine is at operating temperature.

Answer

The actual level is unimportant as long as it is visible in the sight glass when the engine is at operating temperature.

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