NCT Tester Competence Assessment Practice Questions - NCT Vehicle Inspector VTN Tester Competence Assessment (Ireland) Exam

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What is the maximum permissible smoke opacity reading for a naturally aspirated diesel engine first registered before July 2008 during an NCT diesel smoke test?

0.5 m-1 1.5 m-1 2.5 m-1 3.0 m-1

Correct Answer:

2.5 m-1

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