measurement. A lot of other factors, such as measuring force (how hard the jaws are pressed together onto the part temperature and the quality of the caliper all play a part in the accuracy of the measurement. The main scale is fixed in place, while the Vernier scale is the name for the sliding scale that opens and closes the jaws. Measure where the main scale lines up with zero on the sliding scale, then add it to the measurement from the sliding scale. Question What are the applications of Vernier caliphs in everyday life? 2, read the main scale where it lines up with the sliding scale's zero.