You are observing the operation of the...

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Question 1 of 205eccef9bbacbc34ba4d456c0

You are observing the operation of the oily-water separator shown in the illustration. Item "1" initially indicates a vacuum and a moment later indicates a positive pressure. Which of the following statements describes what has occurred? See illustration GS-0153.

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🔍 Key Concepts

• Pressure/vacuum behavior in a closed separator tank during different modes of operation • Role of the components connected near item "1" on the tank top (look closely at items 2, 3, 4, 5, and 6 in the illustration) • Sequence of modes in a typical oily‑water separator: filling/processing vs. oil (sludge) discharge

💭 Think About

• When would the separator tank space above the liquid be under vacuum rather than pressure—during filling/processing, or when pushing oil out? • What change in valves or equipment operation, shown in the illustration, could cause the tank to go from vacuum to positive pressure almost immediately? • Which operating mode requires the system to push fluid out of the separator, and which just needs to draw fluid in and let it flow through? Connect that to what the gauge at item "1" is telling you.

✅ Before You Answer

• Identify which line on the top of the separator tank is likely a vent/air or pressure line and which are liquid inlet/outlet lines. • Think about whether a properly operating separator would show both vacuum and pressure at different times during NORMAL operation. • Eliminate any options that describe a condition that would be clearly abnormal or unsafe, given that the gauge simply moved from vacuum to positive pressure without any other problem indicated.

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