What is a lap joint in welding operation, and the meaning of the abbreviation PASS when using a fire extinguisher?

A lap joint in welding is a type of joint where two overlapping pieces of metal are joined together by welding along the edges where they overlap.

The abbreviation PASS stands for:

P - Pull the pin: Pull the pin at the top of the extinguisher that keeps the handle from being accidentally pressed.

A - Aim the nozzle: Aim the nozzle or hose at the base of the fire.

S - Squeeze the handle: Squeeze the handle to release the extinguishing agent.

S - Sweep from side to side: Sweep the nozzle or hose from side to side at the base of the fire until it is extinguished.

Lap Joint in Welding

A lap joint is a type of weld joint where two pieces of metal are overlapped and joined together. The weld is typically made along the length of the overlap, creating a continuous seam. Lap joints are commonly used for sheet metal fabrication, as they are relatively easy to make and require minimal preparation.

PASS Abbreviation in Fire Extinguisher Usage

PASS is an acronym used for the four steps involved in using a fire extinguisher safely and effectively:

- Pull the pin: Remove the safety pin from the top of the extinguisher.
- Aim the nozzle: Point the nozzle of the extinguisher at the base of the fire.
- Squeeze the handle: Depress the handle on the extinguisher, releasing the extinguishing agent.
- Sweep the base: Move the nozzle back and forth across the base of the fire, spraying the extinguishing agent evenly over the area.