Oilers/Plant Tenders (HHC) Civil Service Practice Exam 2026 - Free Oilers & Plant Tenders Practice Questions and Study Guide

The resistance to flow of a liquid is measured with a viscosimeter. This instrument specifically evaluates the viscosity of liquids, which refers to the internal friction that affects how freely a liquid flows. Viscosity is a critical property in many industries, particularly in oil and gas, where understanding the flow characteristics of different fluids can influence the efficiency of operations.

A thermometer, on the other hand, measures temperature, which can affect viscosity but does not directly measure resistance to flow. A manometer is used for measuring pressure in fluids, while a hydrometer measures the specific gravity or density of a liquid. None of these instruments are designed to assess fluid viscosity, making the viscosimeter the appropriate choice for this purpose.