Question

diesel engine exhaust is hazardous because it _____.

• is flammable
• cannot be filtered by a respirator
• contains carbon monoxide and soot
• contains carbon dioxide

Explanation:

To determine why diesel engine exhaust is hazardous, we analyze each option:

• "Is flammable": Diesel exhaust isn't primarily hazardous due to flammability.
• "Cannot be filtered by a respirator": Some respirators can filter exhaust components, so this is incorrect.
• "Contains carbon monoxide and soot": Carbon monoxide is toxic, and soot (fine particles) is harmful, making exhaust hazardous.
• "Contains carbon dioxide": CO₂ is less toxic in exhaust context compared to CO and soot.

Answer:

C. contains carbon monoxide and soot