2026 South Dakota Hazardous Material CDL Practice Test 1

When is it necessary to ground the trailer?

Only when filling a trailer with explosives Only when unloading a cargo tank filled with any flammable liquid When filling or unloading any flammable liquid tank, ground must be maintained until filling hole is properly closed

Correct Answer:

When filling or unloading any flammable liquid tank, ground must be maintained until filling hole is properly closed

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