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?

Question

Accepted Answer

Shut down the engine and allow the engine to cool. With a rag, very slowly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level.

Answer

Allow the engine to continue to run, but with the load removed. With a rag, very rapidly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level.

Answer

Allow the engine to continue to run with a normal load. With a rag, very slowly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level.

Answer

Shut down the engine. With a rag, very rapidly remove the pressure cap to relieve the system pressure. With the cap removed, check the coolant level.