Discussion
Statement I: New vehicle standards alone are sufficient to control fleet emissions.
Statement II: Control equipment degrades in service and is sometimes tampered with.
In the light of the above statements, choose the correct answer.
Answer: B
Correct answer: Statement I is incorrect but Statement II is correct
The second statement is true and it defeats the first. New vehicle standards govern the emission of a vehicle when new and correctly maintained, and nothing more.
Control equipment degrades with age and mileage, and some is deliberately defeated - removed filters, disabled recirculation valves. A small proportion of poorly maintained vehicles accounts for a disproportionate share of fleet emissions, which is why inspection and maintenance programmes are run alongside the standards rather than instead of them.
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