The normal time delay in an oil safety control before it trips is typically 30 seconds. This delay is designed to prevent unnecessary shutdowns caused by momentary fluctuations in oil pressure. Thus, the correct answer is 30 seconds.
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The question asks about the normal time delay in an oil safety control before it trips.
The normal time delay is designed to prevent nuisance trips due to momentary fluctuations in oil pressure.
The typical time delay in an oil safety control is 30 seconds.
Therefore, the correct answer is \boxed{30 seconds}.
Explanation
Understanding the Problem The question asks about the normal time delay in an oil safety control before it trips. The options are 10 seconds, 30 seconds, 120 seconds, and 60 seconds.
Determining the Answer The normal time delay in an oil safety control before it trips is typically 30 seconds. This delay is designed to prevent nuisance trips due to momentary fluctuations in oil pressure.
Final Answer Therefore, the correct answer is 30 seconds.
Examples
Oil safety controls are used in various mechanical systems, such as engines and compressors, to protect against damage from low oil pressure. The time delay prevents the system from shutting down unnecessarily due to brief pressure drops, ensuring stable operation. For example, in a car engine, a sudden acceleration might cause a temporary drop in oil pressure. Without a time delay, the engine could shut off, which would be undesirable. The 30-second delay allows the system to distinguish between a temporary fluctuation and a genuine low-oil-pressure condition.