The oil-pressure failure switch functions include a differential pressure switch, a timer, and a(n) ____.

Question

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The oil-pressure failure switch functions include a differential pressure switch, which measures the difference between oil pressure in the engine and a reference pressure such as atmospheric pressure. When the differential pressure reaches a certain value, the switch actuates a set of control contacts. In some cases, there may also be a timer involved to prevent false alarms or to ensure proper response time. A pressure relief valve, oil cooler, or oil pick-up pump are not necessarily part of the oil-pressure failure switch functions.

The Oil-Pressure Failure Switch Functions Include a Differential Pressure Switch