422/470.
2.
When refueling a vehicle that contains hazardous materials:
The engine should be left on.
The engine should be turned off.
The gas nozzle may be left unattended.
No other vehicles should be at the refueling station.
8 9704 CDL 421 B "" 0

Answer correctly : 0   |   Wrong : 0

Answer Sheet :

Refresh

Refresh this page and redo the question

Restart

Restart this set of tests