If a water pipe in your home freezes, first shut off the main water valve so that a burst section cannot flood the house. Then open the faucet the pipe feeds, which lets melting ice and steam escape. Warm the frozen section with a hair dryer or a heating pad, starting near the faucet and working back toward the frozen spot. Never use an open flame such as a propane torch. Keep applying heat until full water pressure returns, then check the pipe for cracks.
The main purpose of the passage is to:
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Answer: D
Correct answer: instruct readers in how to thaw a frozen pipe safely. Use the purpose-statement test: "The author wrote this to (blank one) about (blank two)." The sentences are commands in order (shut off, open, warm, keep applying, check), so the action is to instruct, and the topic is thawing a frozen pipe safely. An answer that names only the topic misses the action.
- A: This names only the topic; it does not say what the passage does with it, which is to give step-by-step directions.
- B: The passage tells readers how to do the job themselves and never mentions plumbers.
- C: No particular people or events appear; the steps apply to any reader.
- D (correct): The passage gives ordered steps (first, then, keep applying) for the reader to follow, so its action is to instruct.