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Question

Difficulty: MediumDirect Fact Retrieval

Read the following technical passage:

Before operating portable reverse osmosis water purification units (ROWPU) in sub-freezing environments, technicians must activate the internal manifold heating jacket. If ambient temperatures fall below 25 degrees Fahrenheit, the chemical injection metering pump requires pre-heating for 15 minutes to prevent hypochlorite crystallization. Additionally, operators must ensure the high-pressure concentrate discharge valve is positioned open by three full rotations to avoid membrane burst during initial startup.

Based on the passage, complete the statement with the exact number or word specified in the text.

Answer:To prevent a membrane burst during initial startup, operators must ensure the high-pressure concentrate discharge valve is positioned open by 【three】 full rotations.

Answer

three (or 3)
The passage explicitly states that operators must ensure the high-pressure concentrate discharge valve is open by three full rotations to avoid a membrane burst during startup.

Step-by-Step Solution

1
Scan the passage for the specific keywords related to preventing a membrane burst during startup.
Located the sentence: 'Additionally, operators must ensure the high-pressure concentrate discharge valve is positioned open by three full rotations to avoid membrane burst during initial startup.'
Direct fact retrieval requires locating the explicit context and conditions stated in the question stem.
2
Extract the specific quantity required for the discharge valve position.
The text explicitly states 'three' full rotations.
The question asks for the exact number of rotations required to complete the sentence accurately.

Key Concept

Direct factual detail extraction from technical instructional text
Estimated Time:45s
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Topics

Direct Fact Retrieval

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