Question

Difficulty: MediumAuthor's Primary Purpose

Read the three technical excerpts regarding field battery maintenance and safety. Match each excerpt to the statement that best describes the author's primary communicative purpose. Which primary purpose correctly corresponds to each technical excerpt?

  • Proper storage of sealed lead-acid (SLA) batteries requires maintaining an ambient temperature below 25∘C25^\circ\text{C} and conducting quarterly open-circuit voltage checks. Storing discharged units induces lead plate sulfation, permanently reducing capacity. Technicians must recharge batteries measuring below 12.4 V12.4\text{ V} before returning them to storage racks.To outline preventative storage procedures that prevent permanent battery degradation
  • While lithium-based chemistries provide higher energy density, SLA batteries remain the preferred choice for tactical backup power. Their robust tolerance to extreme temperature swings, low risk of thermal runaway, and dependable surge current delivery make them far more reliable in austere field environments.To justify the continued operational reliance on lead-acid batteries over modern alternatives
  • Whenever handling cracked or leaking battery casings, personnel must don neoprene gloves and chemical splash goggles immediately. Neutralize spilled sulfuric acid with sodium bicarbonate solution before attempting cleanup, and isolate the damaged casing in an acid-resistant container to mitigate corrosive hazards.To instruct personnel on mandatory protective protocols during chemical leak incidents

Answer

The storage maintenance excerpt corresponds to outlining preventative storage procedures; the tactical comparison excerpt corresponds to justifying continued operational reliance on lead-acid batteries; and the spill response excerpt corresponds to instructing personnel on mandatory protective protocols.
Each passage is correctly paired based on its primary communicative function: the first excerpt establishes routine preventative maintenance parameters to avoid sulfation; the second provides persuasive justification for equipment selection under tactical constraints; and the third establishes directive safety measures for hazardous material mitigation.

Step-by-Step Solution

1
Analyze the functional objective and tone of the first excerpt.
The text delivers guidelines and technical criteria (25∘C25^\circ\text{C}, quarterly checks, 12.4 V12.4\text{ V}) to protect battery longevity during warehousing.
Identifying procedural guidelines establishes that the primary intent is preventative storage instruction.
2
Analyze the persuasive and comparative structure of the second excerpt.
The text contrasts lithium energy density against lead-acid reliability to explain why lead-acid remains favored in tactical setups.
Recognizing rhetorical justification distinguishes an explanatory defense from neutral procedures.
3
Analyze the directive commands in the third excerpt.
The text uses imperative safety instructions (donning gear, neutralizing acid, isolation) triggered by casing damage.
Noting the emergency response language confirms the purpose is direct instructional safety guidance.

Key Concept

Author's Primary Purpose in Technical and Operational Texts
Estimated Time:1m 15s
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