94. The main propulsion diesel engines on your salvage tug are protected with a high coolant temperature switch used as an alarm contact maker to warn operating personnel of the potential danger of an overheated engine. If the switch is fitted with a test button, what is this used for?

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the test button is used to test the alarm circuit whenever it is deemed necessary to do so.

94. The main propulsion diesel engines on your salvage tug are protected with a high coolant temperature switch used as an alarm contact maker to warn operating personnel of the potential danger of an overheated engine. If the switch is fitted with a test button, what is this used for?

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