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Difficulty: HardCausal Detail Extraction

Read the following passage about industrial machinery:

In closed-loop industrial cooling systems, centrifugal pumps rely on consistent fluid pressure to circulate coolant effectively. When an inlet filter becomes clogged with particulate debris, the fluid intake is severely restricted, causing a sharp drop in local static pressure at the pump suction eye. Because the static pressure falls below the liquid's vapor pressure, tiny vapor bubbles rapidly form within the coolant stream. As these bubbles travel into the higher-pressure regions of the impeller, they violently collapse. The resulting microscopic shockwaves pit and erode the metal impeller blades over time, ultimately leading to mechanical vibration and catastrophic pump failure.

Based on the passage, arrange the following events in the correct chronological order of the cause-and-effect chain, from initial cause to final consequence.

  1. 1Particulate debris clogs the inlet filter, restricting fluid intake.
  2. 2Local static pressure at the pump suction eye drops below the liquid's vapor pressure.
  3. 3Vapor bubbles form within the coolant stream and violently collapse in high-pressure impeller zones.
  4. 4Microscopic shockwaves pit the metal blades, producing severe mechanical vibration and failure.

Answer

The correct sequence starts with debris clogging the inlet filter, leading to a drop in static pressure below vapor pressure, which causes vapor bubbles to form and violently collapse, ultimately producing shockwaves that erode the impeller blades and cause mechanical failure.
The passage presents a strict, explicit four-stage causal chain: first, particulate matter clogs the filter; second, this restriction causes suction eye pressure to fall below vapor pressure; third, the depressurization generates vapor bubbles that collapse under higher impeller pressure; and fourth, the implosions generate shockwaves that pit the metal, producing vibration and total failure.

Step-by-Step Solution

1
Identify the initial trigger stated in the passage.
The text states that failure begins when 'an inlet filter becomes clogged with particulate debris,' restricting fluid intake.
This establishes the first link in the causal progression.
2
Trace the direct effect of the restricted fluid intake.
The restriction causes a 'sharp drop in local static pressure at the pump suction eye' below the vapor pressure.
The passage uses 'causing' and 'Because' to link intake restriction directly to the pressure drop.
3
Extract the consequence of the static pressure dropping below vapor pressure.
Vapor bubbles form and subsequently 'violently collapse' upon entering higher-pressure impeller regions.
The text explicitly states that bubbles form because of the low pressure and collapse as they travel.
4
Identify the ultimate outcome of the bubble collapses.
The collapse generates microscopic shockwaves that erode impeller blades, resulting in vibration and complete pump breakdown.
The passage connects the resulting shockwaves to the final mechanical breakdown.

Key Concept

Extracting and ordering explicit multi-step causal relationships from technical prose
Estimated Time:1m 30s
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Topics

Causal Detail Extraction

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