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6. Which of the following drills are used for drilling holes in concrete and masonry?

A. Battery-operated
B. Pneumatic
C. Hammer
D. Corded hammer drills

Answer :

Final answer:

Several drills can be used for drilling holes in concrete and masonry, including battery-operated, pneumatic, hammer, and corded hammer drills. Among these, hammer drills are particularly effective due to their combined rotation and hammering action. For continuous power and durability, corded hammer drills are also recommended.


Explanation:

Drilling Holes in Concrete and Masonry

When it comes to drilling holes in concrete and masonry, there are several tools that can effectively perform the task. The following types of drills are commonly used:

  1. Battery-operated drills: These versatile tools are convenient for smaller jobs and areas without power access, although they may have limited power for tougher materials.
  2. Pneumatic drills: These drills utilize compressed air as power and are effective for heavy-duty drilling, especially in large construction projects.
  3. Hammer drills: Known for their action that combines rotation and hammering, these drills are ideal for breaking through hard surfaces, making them suitable for concrete and masonry.
  4. Corded hammer drills: These provide consistent power and torque, making them very effective for prolonged use in tough materials like concrete.

In conclusion, all the types mentioned, especially hammer and corded hammer drills, are specifically designed for the task of drilling into hard materials like concrete and masonry.


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