Practice question

A school bus has multiple heater cores plumbed in a series-and-parallel loop. Why is correct hose routing critical when replacing hoses?

  1. Hose routing only affects appearance
  2. Incorrect routing can starve some cores of flow or create airlocks, causing uneven or no heat at certain stations
  3. Any routing works as long as hoses connect
  4. Routing affects only the strobe lamp

Answer: B — Incorrect routing can starve some cores of flow or create airlocks, causing uneven or no heat at certain stations

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