You suspect that the diesel generator in service on your vessel has a low coolant level. Assuming that the cooling water system is pressurized and has no sight glass associated with the expansion tank, which of the following represents the proper procedure for checking the coolant level?
β’ Pressurized engine cooling systems and the danger of opening them when hot β’ Correct sequence for safely securing and cooling machinery before maintenance β’ Effect of engine load and temperature on system pressure
β’ Think about what happens to coolant pressure and temperature while the engine is running versus when it is shut down and allowed to cool. β’ Consider how quickly versus slowly you should relieve pressure on a hot, pressurized system for safety. β’ Ask yourself: when would it be safest to remove a pressure cap on any hot pressurized liquid system, like a car radiator?
β’ Is the engine still running or has it been shut down? β’ Has the engine had time to cool before you touch the pressure cap? β’ When relieving pressure, are you doing it in a way that minimizes the risk of hot coolant spraying out?
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