What must be checked before using a torque wrench?

• A. Calibration by weight and level arm tester
• B. Visual inspection
• C. Battery level
• D. Oil level

Answer: (A)

Before using a torque wrench, you must verify its accuracy through calibration. This is done by applying known weights with a lever-arm tester to confirm that the wrench’s indicated torque matches the actual torque across its range. Accurate calibration ensures fasteners are tightened to the correct specification, preventing under- or over-tightening in critical engine work. Visual inspection is important for detecting damage, but it cannot confirm measurement accuracy. Battery level only matters for certain digital models and does not guarantee correct torque without proper calibration. Oil level is not related to a torque wrench’s function. Always check the calibration status and perform the calibration check if due.