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Question

Difficulty: EasyPower Drills and Drivers

A technician needs to bore large 1-inch1\text{-inch} diameter holes through wooden wall studs to run electrical conduit. Which of the following drill bits is best suited for quickly boring these large holes in wood?

  1. A
    Masonry bit
  2. Spade bitAnswer
  3. C
    Twist drill bit
  4. D
    Phillips driver bit

Answer

The spade bit is the best suited tool for quickly boring large-diameter holes in wood.
The spade bit (paddle bit) has a broad, flat cutting edge with a sharp center spur and side lips. This design allows high-speed drilling of large-diameter holes (1/4 inch1/4\text{ inch} up to 112 inches1\frac{1}{2}\text{ inches} or more) in lumber and wooden studs, making it ideal for running wiring and plumbing pipes.

Step-by-Step Solution

1
Identify the workpiece material and the required hole diameter.
The task requires cutting large 1-inch1\text{-inch} holes through wooden framing studs.
Matching tool geometry to the specific material and hole dimension is necessary for clean, fast, and safe drilling.
2
Evaluate the design and intended application of standard drill accessories.
A spade bit uses a sharp central spur to center the cut and flat cutting wings to evacuate wood chips quickly at high speed.
Spade bits are engineered specifically for rough-in carpentry and rapid large-diameter boring in wood.

Key Concept

Selecting appropriate drill bits based on hole size, workpiece material, and speed requirements.
Estimated Time:45s
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Topics

Power Drills and Drivers

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