Which tool is commonly used for tightening bolts on an aircraft?

• A. Torque wrench
• B. Ratcheting socket set
• C. Pneumatic drill
• D. Adjustable pliers

Answer: (A)

A torque wrench is specifically designed to apply a precise amount of torque to fasteners, such as bolts, ensuring they are tightened to the manufacturer's specifications. This tool is essential in aviation maintenance because over-tightening or under-tightening bolts can lead to mechanical failures or compromised structural integrity of the aircraft. Using a torque wrench allows a technician to achieve the necessary tension without risking damage.

In contrast, while a ratcheting socket set can also tighten bolts, it does not provide the capability to measure or control the amount of torque applied. A pneumatic drill is primarily used for drilling or driving screws rather than for the precise tightening of bolts. Adjustable pliers, although versatile for gripping and turning, lack the required precision and torque measurement capabilities needed for proper bolt tightening in aviation contexts.