Which statement about metering devices is true?

• A. Sometimes
• B. True
• C. False
• D. Never

Answer: (B)

Metering devices regulate how much refrigerant enters the evaporator so the system can handle changing cooling loads without flooding or starving the evaporator. They do this by varying the flow based on conditions like evaporator temperature or superheat, using devices such as thermostatic expansion valves (which adjust with superheat) or fixed metering like capillary tubes. Because their essential purpose is to meter flow to match conditions, the statement about metering devices being true accurately reflects their role. The other options would imply either an absolute or a negation of their function, or are too vague to capture what metering devices are designed to do.