Question 105Refrigeration & AC - 1st Asst/Chief
70% to passHow does a refrigeration solenoid valve differ from a modulating valve?
AA 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.
BBoth valves operate in exactly the same manner, only the manufacturer's terminology is the differentiating factor.
CA solenoid valve can only be installed in liquid lines.
DSolenoid Valves are only used in low voltage refrigeration control systems, while modulation valves are used in high voltage applications.
AI Explanation
The correct answer is 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. Solenoid valves have a binary on/off operation, while modulating valves can be positioned in between fully open and fully closed to precisely control the flow. This difference in operation is the key distinction between the two valve types. The other options are incorrect as they do not accurately describe the fundamental differences between solenoid and modulating valves in refrigeration systems.
Related Questions
Q147:Concerning the arrangement of equipment and associated hoses shown in the illust... Q164:While troubleshooting intermittent failures of the ship service refrigeration sy... Q104:Which of the following statements is true? Illustration GS-RA-12 Q157:A small obstruction at the thermostatic expansion valve inlet will result in whi... Q10:The set point adjustment of the device shown in the illustration is made by rota...
Ready to test your knowledge?
Take a Refrigeration & AC - 1st Asst/Chief Practice ExamOfficial Resources