Which device is appropriate for removing ice from a manhole cover?

The selection of nonsparking tools for removing ice from a manhole cover is appropriate due to safety considerations in environments where flammable gases or vapors may be present. Nonsparking tools are specifically designed to prevent any potential for sparks, which is crucial in areas that could contain explosive materials or hazardous fumes.

Using nonsparking tools reduces the risk of ignition, ensuring a safer work environment when dealing with manhole covers that could be exposed to various hazardous conditions. This approach is particularly relevant in maintenance procedures where the presence of flammable substances in sewage or other confined spaces is a concern, thus improving overall safety for maintenance personnel.

Other tools, such as torches and standard metal tools, could pose a risk by generating sparks or heat that might ignite any flammable material. Iron or steel tools may also rust or corrode, potentially introducing contaminants into the environment. Hence, nonsparking tools represent the best and safest option for this task.