Which of the following tools cannot be fixed in the collet of a multipurpose tool? (1) a file (2) poker (3) a screw driver (4) hammer

First, let's take a look at each of the four tools given: 1. A file - A file is a tool used to remove fine amounts of material, typically used for metalworking or woodworking. 2. Poker - A poker is a tool used for stoking fires and adjusting burning materials. 3. A screwdriver - A screwdriver is a tool designed to insert and tighten, or loosen and remove screws. 4. Hammer - A hammer is a tool with a heavy metal head attached to a handle, used to deliver heavy blows to an object.

Now that we understand each tool, we need to evaluate their compatibility with a collet in a multipurpose tool: 1. A file - File attachments and bits are available for use with collets in multipurpose tools; it can be fixed in a collet. 2. Poker - A poker is not a tool that is typically designed to be used with a collet. It doesn't have a specific function in woodworking or metal working and is not used in combination with a multipurpose tool. 3. A screwdriver - Screwdriver bits are commonly used with collets in multipurpose tools, so a screwdriver can be fixed in a collet. 4. Hammer - Hammer is not designed to be used with a collet, and the impact action of a hammer cannot be provided by a multipurpose tool.

Based on the analysis in Step 2, we can determine that the correct answer is: (2) poker - A poker cannot be fixed in the collet of a multipurpose tool, as it does not have a specific function in woodworking or metal working, and is not compatible with the collet design.