Final answer:
Micrometers and Vernier calipers can help determine the type and size of a thread for repair.
Step-by-step explanation:
In order to determine the type and size of a thread for repair, micrometers and Vernier calipers can be used.
Micrometers provide precise measurements of small objects with great accuracy. They have a spindle and anvil that are brought together to measure the dimensions of the thread. The reading is taken from the scale on the sleeve and the rotating thimble, and can be easily converted to the type and size of the thread.
Vernier calipers are another tool that can be used. They consist of an inside and outside measuring jaws that can be adjusted to fit around the thread. The reading is taken from the Vernier scale, which provides a more precise measurement.