Millwright Level 1 Practice Exam

What are the components of a micrometer?

1. Anvil, spindle, sleeve, thimble

2. Anvil, spindle, sleeve, ratchet, lock nut, frame

3. Anvil, spindle, sleeve, thimble, ratchet, lock nut, frame

4. Anvil, spindle, sleeve, thimble, frame

The correct answer is: Anvil, spindle, sleeve, thimble, ratchet, lock nut, frame

A micrometer is a precise measuring instrument used to measure small dimensions with great accuracy. The correct components of a micrometer include the anvil, spindle, sleeve, thimble, ratchet, lock nut, and frame. The anvil is the part that holds the object being measured in place, while the spindle moves toward or away from the anvil to take a measurement. The sleeve is the main body of the micrometer where the scale is marked, and the thimble is rotated to move the spindle. The ratchet ensures consistent pressure is applied when taking measurements, which is crucial for accuracy. The lock nut secures the measuring position, preventing any movement once the measurement is taken. The frame provides the overall structure and stability of the micrometer. Including all these components makes for a complete and functional design, ensuring the micrometer can provide the precise measurements it's rated for. Thus, the correct identification of these components is important for both understanding how the instrument works and effectively using it in practical applications.