Question

Filter type respirators can be used:

A) when chemicals have poor warning signs such as no taste or odour
B) to filter out nuisance dust
C)to filter out gases, vapours, or chemical fumes
D) when the atmospheric oxygen is below 19.5%

Answer 1

Filter type respirators can be used to filter out nuisance dust, gases, vapours, or chemical fumes, and when atmospheric oxygen is below 19.5%.

Step-by-step explanation:

Filter type respirators can be used for various purposes, including:

1. To filter out nuisance dust, such as particles from road dust.
2. To filter out gases, vapours, or chemical fumes, like carbon monoxide, nitrogen dioxide, and sulfur dioxide.
3. When atmospheric oxygen is below 19.5%.

For example, a respirator can be used when chemicals have poor warning signs, such as no taste or odor, to protect from potential health hazards. It is also important to note that certain chemicals or chemical reactions in laboratories can create harmful fumes, making the use of respirators necessary for inhalation protection.