What is necessary in addition to a 30-150 lb torque wrench and a 30-36 inch extension?

The correct answer is a 3/4 inch deep well socket because it is essential for accessing and applying the required torque to the fasteners in the context of using a torque wrench. Deep well sockets allow for a proper fit over the bolts that might be recessed or located in areas where a standard socket would not provide adequate clearance. This ensures that the torque can be applied accurately to the fastener, which is critical for maintaining the integrity and safety of the equipment.

Using the appropriately sized socket is vital because a mismatch could lead to stripping of the fastener or insufficient torque settings, which can risk component failure. The dimensions of the socket must match not only the wrench but also the specifications of the application you are working on. Therefore, having the 3/4 inch deep well socket in addition to your torque wrench and extension is key to successful and safe operation.