Question:
Which one among the following is not a control device ?
Which one among the following is not a control device ?
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Cutouts and overload protectors control or protect the system. A refrigerant is only the working fluid.
Updated On: Oct 20, 2026
- L.P. cutout
- Overload protector
- Refrigerant
- H.P. cutout
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The Correct Option is C
Solution and Explanation
Step 1: Understand a control device:
A control device senses a condition such as pressure or current. It then starts, stops or protects the system.
Step 2: Check the control items:
L.P. cutout stops the compressor when the suction pressure falls too low. So (A) is a control device.
Overload protector cuts off the motor supply when the current or temperature gets too high. So (B) is a control device.
H.P. cutout stops the compressor when the discharge pressure gets too high. So (D) is a control device.
Step 3: Check the refrigerant:
A refrigerant is the working fluid that carries heat through the cycle. It does not sense anything and does not switch anything on or off.
Final Answer:
The refrigerant is not a control device. This is option (C).
A control device senses a condition such as pressure or current. It then starts, stops or protects the system.
Step 2: Check the control items:
L.P. cutout stops the compressor when the suction pressure falls too low. So (A) is a control device.
Overload protector cuts off the motor supply when the current or temperature gets too high. So (B) is a control device.
H.P. cutout stops the compressor when the discharge pressure gets too high. So (D) is a control device.
Step 3: Check the refrigerant:
A refrigerant is the working fluid that carries heat through the cycle. It does not sense anything and does not switch anything on or off.
Final Answer:
The refrigerant is not a control device. This is option (C).
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