What are the two constant speeds tested in a dynamometer portion of a Smog Check Inspection?

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Multiple Choice

What are the two constant speeds tested in a dynamometer portion of a Smog Check Inspection?

Explanation:
In the dynamometer portion, emissions are measured under two steady operating conditions to mimic real driving. The two constant speeds tested are 25 mph and 50 mph. At 25 mph the engine is loaded at 50% to simulate a moderate-load, lower-speed situation, and at 50 mph the load is 25% to represent higher-speed cruising with lighter load. This pairing covers a range of engine operation so the test accurately reflects typical driving and emissions.

In the dynamometer portion, emissions are measured under two steady operating conditions to mimic real driving. The two constant speeds tested are 25 mph and 50 mph. At 25 mph the engine is loaded at 50% to simulate a moderate-load, lower-speed situation, and at 50 mph the load is 25% to represent higher-speed cruising with lighter load. This pairing covers a range of engine operation so the test accurately reflects typical driving and emissions.

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