| Which one of the following is a difference between a typical relief valve and a typical safety valve? |
| A) The actuator closing spring on a relief valve is in a compressed state whereas the actuator closing spring on a safety valve acts in tension. |
| B) Relief valves are capable of being gagged whereas safety valves are not. |
| C) A relief valve gradually opens as pressure increases above set point pressure whereas a safety valve fully opens at the set point pressure. |
| D) The blow down of a relief valve is greater than the blow down of a safety valve. |
