Which of the following is NOT a part of the monthly fire extinguisher check?

The correct response identifies that ensuring a fire extinguisher is in a locked cabinet is not a routine part of the monthly fire extinguisher check. Monthly inspections typically focus on operational readiness and safety features, which includes confirming the extinguisher is fully charged, checking for signs of tampering or use, and looking for any physical damage that could impair its function.

While it's important for fire extinguishers to be properly stored—often in a visible and accessible location—locking them away is not a standard procedure during the monthly checks. This aspect could hinder immediate accessibility in the event of a fire, which is why it doesn't fall within the primary evaluation criteria during these routine checks.

In contrast, checking for charge, signs of actuation, or damage directly relate to ensuring the extinguisher can be used effectively when needed, making those steps integral to the monthly safety protocol.