Final answer:
Technician B is correct. Crescent wrenches are adjustable wrenches that can grip a wide range of fasteners, while line wrenches are specifically designed for brake fittings.
Step-by-step explanation:
Technician B is correct.
Crescent wrenches are adjustable wrenches with a smooth jaw that can be used to grip a wide range of fasteners. They are not specifically designed to save time going back and forth to the toolbox. On the other hand, line wrenches are specially designed wrenches with a closed-end that can grip brake fittings securely without rounding off the fastener.
Therefore, when taking apart brake fittings, technician B's statement that line wrenches are used is accurate.