In Pennsylvania, which of the following statements is true regarding emissions testing?

In Pennsylvania, emissions testing is a critical process that helps in maintaining air quality and ensuring that vehicles meet the established emissions standards. The correct statement highlights that testing must be conducted with certified equipment, which is vital for the accuracy and reliability of the emissions data collected. Certified equipment is designed and calibrated to meet specific standards, ensuring that the tests reflect the actual emissions produced by the vehicle. This requirement helps in maintaining consistency and integrity in the emissions testing process, ultimately contributing to effective regulatory compliance and environmental protection.

This approach ensures that only qualified personnel using appropriate tools can perform emissions tests, which helps to avoid discrepancies caused by unqualified testing methods. Certified equipment also plays a critical role in identifying vehicles that may be non-compliant with emissions standards, and thus, is essential to the program's effectiveness in controlling air pollution.