Practice question

What is "fog sealing" in highway maintenance work?

  1. Spraying water mist onto hot asphalt to accelerate compaction cooling.
  2. Applying dense white thermoplastic steam over highway shoulder rumble strips during installation.
  3. A light application of diluted asphalt emulsion sprayed over an existing pavement.
  4. Injecting polyurethane chemical foam into subgrade voids under concrete slabs.

Answer: C — A light application of diluted asphalt emulsion sprayed over an existing pavement.

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