To prevent the Jack from sinking into the surface, what should you do?

• A. Use a larger jack
• B. Apply lubricant
• C. Place it on a weight distributing base
• D. Increase lift height

Answer: (C)

Distributing the load across a wider area to lower bearing pressure is the key idea. A jack applies a concentrated force to a small contact point; on soft or uneven surfaces, that pressure can cause the ground to yield or the jack to sink, compromising stability. A weight-distributing base increases the contact area, spreading the load and keeping the jack from penetrating the surface. Use a rigid base that won’t deform—like a thick plate or a sturdy sheet of plywood or timber—that stays flat and under full contact as you lift.

Larger jacks might seem helpful for capacity, but they don’t address the issue of ground bearing pressure. Lubricant can reduce friction in moving parts, but it doesn’t prevent sinking and can create control problems. Increasing lift height can destabilize the setup and raise the risk of tipping or losing contact with the base.