| According to Coast Guard regulations (46 CFR) for electric storage tank-type hot water heaters, what statement is true concerning independent temperature limiting devices? |
| A) they must prevent the water in the upper 25% of the tank from attaining a temperature higher than 99°C (210°F) |
| B) they are automatically reset when the temperature drops below 90°C (194°F) |
| C) they open a secondary power supply to the heater elements only |
| D) they prevent the water from attaining a temperature of more than 90° (194°F) |
