| In addition to one one safety pressure relief valve, Coast Guard Regulations (46 CFR) require that a small electrically heated hot water supply boiler must be fitted with what other protective device? |
| A) a temperature relief valve set for not more than 125° Fahrenheit |
| B) a temperature relief valve or a combined pressure-temperature relief valve set for not more than 125° Fahrenheit |
| C) a temperature relief valve or a combined pressure-temperature relief valve set for not more than 210° Fahrenheit |
| D) an audible high water temperature alarm set for not more than 210° Fahrenheit |
