Architecture Practice Exam

Which type of pliers are considered the most common general-purpose pliers with adjustable jaw openings?

1. Locking pliers

2. Needle-nose pliers

3. Slip-joint pliers

4. Crescent pliers

The correct answer is: Slip-joint pliers

Slip-joint pliers are indeed recognized as the most common general-purpose pliers that feature adjustable jaw openings. Their design includes two pivot points, which allow the jaws to be set at various widths, offering versatility for gripping different sizes of objects. This adjustability makes them practical for a wide range of tasks, from general assembly work to light fabricating and pipe gripping. On the other hand, locking pliers, while versatile, are fundamentally different as they can lock in place once set, providing a more secure grip but without the adjustable opening feature that slip-joint pliers have. Needle-nose pliers specialize in reaching into tight spaces, but do not offer the same degree of jaw adjustment for varying sizes. Crescent pliers, or adjustable wrenches, are intended primarily for gripping and turning nuts and bolts, thus serving a more specific function rather than being classified as all-purpose general-use pliers.