which is an example of a permit - required co...
which is an example of a permit - required confined space? choose an option below a grain silo filled with grain a vat that contains a little bit of acid in the bottom an empty semi - trailer all of the above
Answer
# Brief Explanations:
A permit - required confined space has one or more of the following characteristics: contains or has the potential to contain a hazardous atmosphere; contains a material that has the potential for engulfing an entrant; has an internal configuration such that an entrant could be trapped or asphyxiated by inward - converging walls or by a floor which slopes downward and tapers to a smaller cross - section. A grain silo filled with grain can engulf an entrant, a vat with acid at the bottom has a hazardous atmosphere, and an empty semi - trailer can have asphyxiation risks due to lack of ventilation in some cases.
# Answer:
D. All of the above