Hard drawn copper tubing is commonly used in larger refrigeration systems. What statement concerning its use is true?

Correct Answer: Option B — Hard drawn copper tubing is not easily flared, bent, or swaged, so brazed fittings are commonly used.

Hard-drawn copper tubing possesses high rigidity and cannot be readily flared, bent, or swaged manually without work-hardening or cracking. Therefore, permanent joints require capillary brazing using approved silver alloy fittings.