Which of the following is NOT listed as a PDI item for Water Glycol extinguishers?

• A. Stowage
• B. Quantity
• C. Pressure gauge must be in the serviceable band
• D. Wire seal on handle is intact

Answer: (C)

The key idea is that PDI items focus on the practical, observable aspects that ensure an extinguisher is ready and tamper-evident. For Water Glycol extinguishers, the checks you perform are about where it’s stowed, how many are on board, and whether the wire seal on the handle is intact. These items verify accessibility, presence, and tamper protection, which are the main concerns for this type during PDI.

The pressure gauge check—making sure the gauge is in the serviceable band—is not part of the PDI for Water Glycol extinguishers. This type of extinguisher doesn’t rely on a gauge as a PDI indicator, so you wouldn’t include a gauge reading in the PDI items for it. Therefore, that particular check isn’t listed as a PDI item for Water Glycol extinguishers, making it the best answer.

In contrast, confirming correct stowage, the correct quantity, and an intact wire seal are all applicable and essential PDI items, since they directly relate to the extinguisher’s accessibility, presence, and tamper evidence.