Full access allows:
- Solve all tests online without limits;
- Remove all advertisements on website;
- Adding questions to favorite list;
- Save learning progress;
- Save results of practice exams;
- Watching all wrong answered questions.
- Homepage »
- Third Assistant Engineer (Steam-Motor-Gas Turbine Plants (Unlimited)) »
- Q534 - Engineering Safety & Environmental Protection
167. Which of the following limitations is correct regarding gas masks, otherwise called filter masks?
A canister's reliability is up to 5 years from the date of manufacture when the seal remains unbroken; canister service life is not fixed and depends on factors like contaminant concentration and breathing rate, and there is no universal 24-hour discard rule after the seal is broken.
Comments (0)
There are no comments at the moment. If you found an error or think question is incorrect, tell everyone about it
Only signed in users can write comments
Signin