| How does a refrigeration solenoid valve differ from a modulating valve? |
| A) A liquid line solenoid valve is either completely opened or closed, whereas a modulation valve is infinitely positioned according to the strength of the applied electrical signal. |
| B) Both valves operate in exactly the same manner, only the manufacturer's terminology is the differentiating factor. |
| C) A solenoid valve can only be installed in liquid lines. |
| D) Solenoid Valves are only used in low voltage refrigeration control systems, while modulation valves are used in high voltage applications. |
