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Difficulty: EasyAuthor's Primary Purpose

In pneumatic maintenance facilities, compressed air lines must be equipped with moisture separators and desiccant filters before reaching air-powered tools. As ambient air is compressed, water vapor condenses into liquid droplets due to changes in pressure and temperature. If this accumulated moisture enters pneumatic tools, it washes away internal lubricating oils, leading to rapid component wear, corrosion, and premature tool failure. By removing condensed water at designated drop points along the distribution line, technicians ensure consistent tool performance and extend the operational lifespan of pneumatic equipment.

Which of the following best describes the author's primary purpose in the passage?

  1. A
    to describe how temperature and pressure changes condense ambient water vapor
  2. to explain why moisture must be removed from compressed air systemsAnswer
  3. C
    to criticize technicians for neglecting regular pneumatic tool maintenance
  4. D
    to provide step-by-step instructions for installing desiccant air filters

Answer

To explain why moisture must be removed from compressed air systems
The primary purpose of the passage is to explain why removing moisture from compressed air distribution lines is necessary to protect tools from corrosion and wear, thereby ensuring long-term equipment reliability.

Step-by-Step Solution

1
Analyze the passage structure and main focus
The text explains how water forms in compressed air, the damaging effects of that water on tools, and the benefit of removing it.
Determining what the entire passage discusses reveals the underlying goal of the author.
2
Distinguish between supporting details and the overarching objective
Mentions of condensation physics and filter types serve to support the central explanation of why moisture removal is required.
The primary purpose must encompass the whole passage rather than isolated facts.
3
Identify the statement that captures this main purpose
The statement expressing the explanation for removing moisture from compressed air systems accurately reflects the author's primary communicative goal.
The author's intent is to inform readers about the necessity and rationale behind keeping pneumatic lines dry.

Key Concept

Author's Primary Purpose
Estimated Time:45s
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Author's Primary Purpose

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