Which of the illustrated devices would be...

Question 1 of 2707066636eee28f7522a1c51eb83

Which of the illustrated devices would be the LEAST accurate for the purposes of weighing-in a refrigerant charge? Illustration RA-0045

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Question 1 of 27070

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Which of the illustrated devices would be the LEAST accurate for the purposes of weighing-in a refrigerant charge? Illustration RA-0045

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🔍 Key Concepts

• How refrigerant charge is most accurately measured (by weight rather than volume) • The difference between devices designed as scales and those intended for measuring volume or flow • How the size of graduations and need for temperature correction can affect accuracy

💭 Think About

• Look at each device and ask yourself: which ones are clearly designed to weigh something, and which one works on a different principle? • Compare how precisely you can read each device. Which one would require you to estimate or correct more than directly read an exact weight? • Think about how changes in temperature might affect each device’s reading. Which device’s indication would change the most for the same actual amount of refrigerant?

✅ Before You Answer

• Identify which options are true scales (platform or hanging) that read out weight directly. • Notice which device measures volume in a sight glass or tube instead of weight, and would need temperature correction tables. • Compare the smallest division/marking you can clearly read on each instrument; larger, harder‑to-read divisions usually mean lower accuracy.