Question 98Refrigeration & AC - 1st Asst/Chief
70% to passHard drawn copper tubing is commonly used in larger refrigeration systems. What statement concerning its use is true?
AHard drawn copper tubing is not easily flared, bent, or swaged, so brazed fittings are commonly used.
BHard drawn copper tubing is easily swaged, so reducing fittings are rarely used in changing line size.
CHard drawn copper tubing is easily bent, so elbow fittings are rarely used in changing direction.
DHard drawn copper tubing is easily flared, so flare fittings are commonly used.
AI Explanation
The correct answer is A) Hard drawn copper tubing is not easily flared, bent, or swaged, so brazed fittings are commonly used. Hard drawn copper tubing is a stiffer and less malleable form of copper tubing, making it more difficult to flare, bend, or swage compared to soft annealed copper tubing. Due to this, brazed fittings are commonly used with hard drawn copper tubing to create secure, leak-proof connections, as flare or compression fittings may not be as effective. The other answer choices are incorrect because: B) hard drawn copper is not easily swaged, C) it is not easily bent, and D) it is not easily flared, so flare fittings are not commonly used.
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