Copyright Goodheart-Willcox Co., Inc. 418 Fluid Power 8. True or False? Workstation drop lines should be attached to the top side of the distribution lines to prevent liquid water from draining into the workstation. 9. True or False? The diaphragm of a direct-operated pressure regulator is directly exposed to the pressurized air in the outlet port. 10. In a pilot-operated pressure regulator, the control spring and adjustment screw are replaced by a _____. A. sealed, pilot-air chamber B. poppet spring C. solenoid-operated, two-way valve D. herringbone gear 11. True or False? A lubricator atomizes a measured amount of oil and mixes it with compressed air during the intake stroke of the compressor. 12. The most common rigid conductor used for major compressed-air systems is _____. 13. True or False? Tables are available in engineering handbooks that provide only data on air pressure loss based on ten feet of straight conductor. 14. True or False? Flexible conductors constructed as pneumatic lines should contain a minimum of three layers of materials. 15. True or False? The middle sections of fl exible pneumatic conductors are typically woven, reinforcing layers designed to withstand system abrasive handling. 16. True or False? Ideally, hoses should be no larger in diameter than necessary to supply the needed volume of air to operate the equipment. For questions 17–20, match the pressure regulator designs listed below with the feature associated with that design. A. Venting orifi ce. B. Sealed, pilot-air chamber. C. Control spring. D. Poppet spring. E. Diaphragm-control chamber. 17. Direct operated. 18. Basic, diaphragm chamber. 19. Relieving. 20. Balanced-poppet valve. 21. Pilot operated. R.P. Adams, Subsidiary of Service Filtration Corporation. Provides a brief explanation of how cyclone separators remove condensed liquid and other contaminants from the primary airstream of a pneumatic system distribution line. Wilkerson Corp., Pneumatic Division. Provides extensive information on pneumatic system fi ltration, pressure control, and lubrication. Includes especially helpful information concerning workstation FRL units. Chapter Review Answer the following questions using information in this chapter. 1. True or False? Conditioning and distribution of compressed air is the major portion of tasks in an industrial pneumatic system. 2. True or False? The fi rst factor contributing to the quality of air for a pneumatic system is the quality of atmospheric air surrounding the system. 3. The three fi lter categories used in pneumatic systems are dry, oil bath, and _____. A. paper B. pneumatic C. oil wetted D. intake line 4. True or False? According to general gas law, any change in the temperature of a gas is only refl ected in gas pressure. 5. The temperature at which water vapor in the air begins to condense to form liquid water is known as the ______. A. dew point B. poppet point C. saturation point D. balance point 6. The _____ distribution system distributes air through a main line that forms a continuous circle. A. centralized B. drop C. FRL D. loop 7. A pitch (slope) of _____ per 10′ of distribution lines allows water to accumulate and be drained. A. 1/2″ B. 1″ C. 5″ D. 8″