Common Tools and Fasteners Flashcards

An automotive technician needs to tighten a series of bolts to a precise specification to ensure a component is seated correctly and to prevent warping. Which of the following tools is specifically designed for this purpose?

Answer: Torque wrench

A torque wrench is a specialized tool used to apply a specific, measured amount of torque to a fastener such as a nut or bolt. This is critical in many mechanical applications, like engine assembly, where over-tightening or under-tightening can lead to component failure. An impact wrench applies high torque quickly but isn't precise, an adjustable wrench is for general use, and a standard socket wrench applies unmeasured torque.

Which type of fastener is characterized by having machine threads on one end and wood screw threads on the other, designed to be screwed into a wooden surface and then accept a nut or other threaded component?

Answer: Hanger bolt

A hanger bolt is a headless fastener that features two different thread types: wood screw threads at one end and machine screw threads at the other. This unique design allows it to be installed into wood or a similar soft substrate while providing a machine-threaded stud for attaching other objects with a nut.

When assembling a piece of furniture, you encounter a bolt with a round, smooth head and a square section underneath the head. This design prevents the bolt from turning when the nut is tightened. What is this type of bolt called?

Answer: Carriage bolt

A carriage bolt is distinguished by its smooth, domed head and a square neck directly beneath it. When the bolt is inserted into a hole in wood or soft metal, the square neck seats into the material, preventing the bolt from rotating as the nut is tightened. This makes it ideal for applications where the bolt head is not accessible.

A worker needs to cut a metal rod. Which of the following hand tools is most appropriate for this task?

Answer: Hacksaw

A hacksaw is a fine-toothed saw designed specifically for cutting metal. Its blade is held under tension in a frame. A coping saw is for intricate cuts in wood, a backsaw is for precise woodworking joints, and a keyhole saw is for cutting small, awkward holes.

Which of the following wrenches provides the best grip on a hexagonal nut or bolt head by completely enclosing it, thereby reducing the risk of slipping and rounding the corners?

Answer: Box-end wrench

A box-end wrench has a closed loop that fits completely around a nut or bolt head. This design provides multiple points of contact, distributing the force evenly and offering a much more secure grip than an open-end or adjustable wrench, which can slip and damage the fastener. A pipe wrench is designed for gripping round objects like pipes.

To create a hole in concrete or masonry for installing an anchor, the most effective tool to use is a:

Answer: Hammer drill

A hammer drill is specifically designed for drilling into hard materials like concrete, brick, or stone. It combines the rotational action of a standard drill with a rapid hammering action that pulverizes the material, allowing the bit to move forward. A standard drill lacks the hammering function, and an impact driver is designed for driving screws, not drilling into masonry.