| You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE? |
| A) The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue. |
| B) Steam cleaning and water washing are both capable of generating electrostatic charges within a tank. |
| C) Washing water should be re-circulated if possible because it has the same electric potential as the cargo tank being cleaned. |
| D) The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank. |
