Philadelphia Fire Department Practice Exam

Locks or pawls are also called _____.

1. Blocks

2. Dogs

3. Shoes

4. Spurs

The correct answer is: Dogs

Locks or pawls are commonly referred to as "dogs." In mechanical systems, locks or pawls serve a critical function in ensuring that a mechanism holds its position or does not backtrack. The term "dog" in this context comes from the analogy used in various machines and devices where this component prevents movement—similar to a "dog" holding a door shut. In the fire service, understanding terminology related to equipment and mechanisms is crucial for safety and efficiency. When a firefighter uses tools that involve locking mechanisms, the knowledge that these components are called "dogs" helps in better communication and operation. The other terms presented relate to different components or systems in machinery and do not apply to locks or pawls. For instance, "blocks" can refer to devices that are used to limit or guide motion; "shoes" often relate to shoes on an apparatus or a tools function; and "spurs" usually denote supporting structures or added items for grip. Thus, recognizing the specific term "dogs" aids in better technical comprehension and dialogue within the field.