When should the Smog Check approved fan be used?

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Prepare for the California BAR Smog Technician Test. Review key topics with flashcards and multiple choice questions, each question includes hints and explanations. Get ready to ace your exam!

Multiple Choice

When should the Smog Check approved fan be used?

Explanation:
The test checks when you should use the Smog Check approved fan to ensure the engine can be cooled properly during the test. It is used only when the ambient temperature is above 72°F, because hotter conditions make it harder for the cooling system to maintain stable engine temperature and prevent heat soak, which could skew emissions readings. In cooler weather, natural cooling is usually sufficient, so the fan isn’t needed; using it then could alter readings, and never using it in hot weather would risk overheating and invalid results.

The test checks when you should use the Smog Check approved fan to ensure the engine can be cooled properly during the test. It is used only when the ambient temperature is above 72°F, because hotter conditions make it harder for the cooling system to maintain stable engine temperature and prevent heat soak, which could skew emissions readings. In cooler weather, natural cooling is usually sufficient, so the fan isn’t needed; using it then could alter readings, and never using it in hot weather would risk overheating and invalid results.

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