For heavy-duty vehicles, where may the BAR-97 EIS be connected according to the guidelines?

• A. It may be connected to a vehicle located inside the building.
• B. It shall not be used outside the station building but may be connected to a large vehicle located outside.
• C. It may be connected to a vehicle outside but must not be used outside the building.
• D. It cannot be used with any vehicle.

Answer: (B)

The key idea is that the BAR-97 EIS stays inside the station during use, but it can be connected to a heavy-duty vehicle that is located outside. This arrangement keeps the equipment protected and tested in a controlled indoor environment while still allowing the vehicle, which may be outside for exhaust testing, to be hooked up to the EIS. Therefore, the guideline is that it cannot be used outside the station building, but it may be connected to a large vehicle located outside. The other options don’t fit because they imply either using the equipment outside or prohibiting any connection to a vehicle, which isn’t how the procedure is designed.