Final answer:
Engulfment accidents involve materials like grain, sand, and gravel, where a person can be buried or submerged, but steam is not involved in such accidents as it is not a solid material.
Step-by-step explanation:
The common materials involved in engulfment accidents include grain, sand, and gravel, but not steam. Engulfment accidents can occur when a person is submerged or buried by bulk material such as agricultural products or construction materials. For example, in flour mills, the dust from grain can be highly flammable when dispersed in the air, leading to potential explosions. Steam, however, is not a solid material and does not cause engulfment; instead, it can cause burn injuries and is related to different types of workplace accidents.