What can happen if a lubricant has too low of a viscosity?

The impact of having a lubricant with too low of a viscosity is significant. A lubricant that is too thin does not provide adequate film strength between moving parts. This can lead to insufficient lubrication, which results in increased friction and wear between components. When there is not enough protection due to the low viscosity, it can cause metal-to-metal contact, which can ultimately lead to premature failure of the machinery.

In contrast, increased drag and wear is a direct consequence of inadequate lubrication, and the machinery becomes less efficient over time due to the excessive wear of its moving parts. The correct answer underscores the importance of selecting the right viscosity for lubricants to ensure optimal performance and longevity of machinery.