NAVEDTRA 14105A, FLUID POWER PRACTICE QUESTIONS AND ANSWERS

NAVEDTRA 14105A, FLUID POWER PRACTICE QUESTIONS AND ANSWERS How can the specific gravity of a liquid or solid be expressed? • As a ratio between the weight of the substance and the density of a volume of water • As a ratio between the weight of the substance and the weight of an equal volume of water • As the number that shows the density of the substance in the metric system • As in 2 and 3 above - Answer️️ -As a ratio between the weight of the substance and the weight of an equal volume of water The purpose of your textbook Fluid Power is to provide you with • information on fluid power application for specific equipment • a basic reference concerning fundamentals of fluid power • a basic guide for use in maintaining hydraulic equipment • a reference concerning advanced concepts of fluid power - Answer️️ -a basic reference concerning fundamentals of fluid power A device used for measuring the specific gravity of a liquid is known as a • hydrometer • hydroscope • hydrostat • hydrography - Answer️️ -hydrometer ©SOPHIABENNETT 2024/2025 ACADEMIC YEAR 7:59 PM Page | 2 The critical factors affecting the state of matter are • density and specific gravity • pressure and density • pressure and temperature • temperature and weight - Answer️️ -pressure and density The study of hydraulics was originally confined to the study of the physical behavior of water at rest and in motion. The term "hydraulics" now includes the physical behavior of all • gases • liquids • liquids gases and solids • liquids and gases - Answer️️ -liquids The head or pressure due to the weight of a fluid depends on the density of the fluid and the • area of the bottom surface of the container • vertical height of the fluid • geometric shape of the container • total volume of the fluid - Answer️️ -area of the bottom surface of the container Pressure can be measured in terms of force per unit area. • True ©SOPHIABENNETT 2024/2025 ACADEMIC YEAR 7:59 PM Page | 3 • False - Answer️️ -True Pascal's law pertains to the • differences of floating and submerged bodies • construction of aqueducts • transmission of force in confined fluids • use of water wheels for doing work - Answer️️ -transmission of force in confined fluids What change if any will occur in the volume and weight of a substance if its temperature changes? • Its weight will change but its volume will remain constant • Its volume will change but its weight will remain constant • Both its volume and weight will be unaffected • Both its volume and weight will change - Answer️️ -Its volume will change, but its weight will remain constant Which statement about specific gravity is false? • Specific gravity of a substance should be measured at a standardized temperature and pressure • The density of a solid can be determined by multiplying its specific gravity times the density of water • Specific gravity will vary with the size of the sample being tested ©SOPHIABENNETT 2024/2025 ACADEMIC YEAR 7:59 PM Page | 4 • Specific gravity can also be described as specific weight or specific density - Answer️️ -Specific gravity will vary with the size of the sample being tested The pressure of force exerted on the end of a rigid metal bar is applied equally and undiminished to all surfaces of the bar. • True • False - Answer️️ -True Which of the following is a favorable characteristic of a fluid power system? • Very large forces can be controlled by much smaller ones • Different parts of the system can be located at widely separated points • Motion can be transmitted without the slack inherent in the use