Answer :
Final answer:
A capillary tube metering device controls the refrigerant flow by pressure drop. the given statement is true because the pressure drop is to controls the refrigerant flow rate.
Explanation:
A capillary tube is a simple and commonly used metering device in refrigeration systems. It consists of a narrow, small-diameter tube that restricts the flow of refrigerant, causing a pressure drop, this pressure drop is what controls the refrigerant flow rate. As the refrigerant flows through the capillary tube, the pressure on the high-pressure side decreases due to the restriction, while the pressure on the low-pressure side remains constant.
This pressure difference causes the refrigerant to flow from the high-pressure side to the low-pressure side, effectively controlling the refrigerant flow rate. Other metering devices, such as expansion valves, also control refrigerant flow through pressure drop. However, capillary tubes specifically rely on pressure drop as the main mechanism for metering. So therefore the statement that a capillary tube metering device controls the refrigerant flow by pressure drop is true.
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