Copyright Goodheart-Willcox Co., Inc. 202 Fluid Power 11. When installing tubing in a hydraulic system, how can both vibration and thermal expansion/ contraction be absorbed? A. Install smaller fi ttings. B. Place extra fi ttings in the lines to increase heat transfer. C. Place a bend in the tube between the attachment points. D. Increase fl ow rate through the line. 12. Of the three layers of materials used in the construction of most types of hydraulic hoses, what is the function of the middle layer? A. Reinforcement. B. Flexibility. C. Heat transfer. D. Increase hose rigidity. 13. Proper selection and installation of pipe, tube, or hose fi ttings in hydraulic systems ensure reasonable initial construction cost, effi cient system operation, and _____. A. straight-line connections B. minimal ongoing maintenance cost C. easy disassembly and storage D. None of the above. 14. A(n) _____ pipe thread should be used when assembling pipe to prevent leakage when the joint is placed under high system pressure. A. Dryseal B. O-ring C. jam nut D. tapered 15. True or False? The two general hose-end fi tting styles used with hydraulic fl exible hose are permanently attached and reusable. 16. Which of the following is a situation that may result if conductors and fi ttings are not carefully selected for a given hydraulic system? A. Excessive initial cost. B. Ineffi cient system operation. C. Premature part-failure. D. All of the above. 17. Which of the following factors must be considered when selecting and installing conductors? A. Volumetric effi ciency. B. Conductor color. C. Pressure rating. D. Flow characteristics. Chapter Review Answer the following questions using information in this chapter. 1. The component that is designed to hold the fl uid not currently in use in the system is called the _____. A. baffl e B. conductor C. reservoir D. pipe 2. True or False? Baffl es are used in the interior of reservoirs to direct the movement of fl uid and reduce heat, dirt, air, and water. 3. The three types of system fl uid lines connected to a typical reservoir are inlet line, return line, and _____ return line. 4. Two reservoir confi gurations that are suitable for use with a pump that requires a positive pressure on the inlet line are L-shaped and _____. 5. True or False? The three basic categories of fl uid conductors used in hydraulic systems are pipe, tubing, and adapters. 6. True or False? Shock pressure is short duration, high pressures in a hydraulic system resulting from control valve shifting and unexpected load changes. 7. What factors within the hydraulic system cause resistance to fl uid fl ow in the system? A. Viscosity of the fl uid. B. Conductor bends. C. Fluid turbulence. D. All of the above. 8. True or False? Pipe, as related to a hydraulic system, is a conductor made from high-tensile- strength mild steel used to create distribution systems. 9. True or False? American National Standards Institute (ANSI) provides a pipe wall thickness standard using schedule numbers ranging from 1 to 5. 10. The size of hydraulic system tubing is indicated by the actual _____ of the tube. A. thread size B. length C. outside diameter D. fl ow rate