Common Plumbing Processes Practice Test

For slotted screws, use a flat-headed screwdriver whose blade is a good fit for the slot and remains straight and uniform in thickness. This ensures the blade seats fully in the groove and makes even contact with both sides of the slot, giving you solid torque and reducing the chance of cam-out or rounding the screw head. A blade that isn’t the right width or isn’t uniformly thick can wander, slip, or strip the slot, making the job harder and risking damage. Using a Phillips screwdriver on a slotted screw won’t seat properly because the cross-shaped tip won’t align with a straight slot, which leads to slipping and damage. A damaged screwdriver handle or hammering the screwdriver are unsafe and reduce control, increasing the risk of injury or damage. The best practice is a matching flat blade with uniform thickness kept in good condition, used with steady downward pressure and clean alignment.