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USCG Exam PracticeMaintenance, machine tools, drawings, and tables

Before performing internal maintenance work on a diesel engine, which of the following actions is required to prevent the engine from rolling?

  1. A. Closing the fuel shutoff valve only
  2. ✓ Engaging the turning gearCorrect
  3. C. Isolating the jacket-water cooling system
  4. D. Securing the lube-oil priming pump

Why B is correct

NAVEDTRA 14075 §3-1 specifies that before any internal work, the engine is stopped, cooled, starting air and fuel are isolated, and the turning gear is engaged so the engine cannot roll. Closing the fuel valve alone does not prevent rotation.

Cited:NAVEDTRA 14075 §3-1

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Before performing internal maintenance work on a diesel engine, whi… — USCG Exam Practice · CaptainsGround