Basic Hydraulics Practice Test 2026 - Free Hydraulics Practice Questions and Study Guide

Understanding gauge ratings helps you read and select instruments correctly. The range of a gauge is the span of pressures it is designed to measure, from its minimum to its maximum. The maximum readable pressure is the upper end of that range—the highest pressure the gauge can display without saturating or failing. The scale is the set of marked values on the dial, and graduation refers to the finer subdivisions between those marks. Accuracy describes how close the read value is to the true pressure. Because the question asks for the term that denotes the highest pressure the gauge can display, it is the range.