You need to fuel your placarded hazmat vehicle. What precaution applies?

Pick an answer

1. No special precaution applies since fuel and cargo are unrelated
2. Someone must remain in a position to handle an emergency, such as staying near the controls or shutting off the engine if needed
3. The placards must be removed before fueling begins
4. Fueling is fine as long as the engine keeps running during the stop

Correct!

Not quite. The correct answer is highlighted.