Engine: Engineering Safety

1. A A maximum of only 30 minutes of protection is afforded with a single canister when in atmospheres containing highly toxic gases.
2. B All canisters must be discarded within 24 hours when the seal becomes broken.
3. C A canister is reliable for up to 5 years from the date of manufacture, as long as the seal is unbroken.
4. D All of the above.

Tip: press A-D to answer