What is a disadvantage of down hole hammer drilling?

• A. Low noise
• B. High air requirements
• C. Minimal wear on equipment
• D. Low power consumption

Answer: (B)

When drilling with a down hole hammer, the hammer is driven by compressed air, and that same air flushes rock cuttings up to the surface. The main downside of this method is the large volume of air it requires to operate effectively. A hefty air supply means you need a powerful compressor, ample piping, and often higher energy costs, which adds to equipment size, cost, and logistical needs—especially in remote sites. That air demand can also limit depth and rate of penetration compared with other drilling methods.

This method isn’t associated with low noise, minimal wear, or low power use in practice. It tends to be quite noisy, moving parts wear over time, and it relies on substantial power to keep the hammer cycling and to deliver the flushing air.