ASSIGNMENT 8 Textbook Assignment: “Basic Hydraulic/Pneumatic and Emergency Power Systems,” chapter 7, pages 7-1 through 7-46. 8-1. 8-2. 8-3. 8-4. 8-5. A system that combines the use of hydraulics and pneumatics is known by what term? 1. Hydroponics 2. Pneumatolytic 3. Pneumatophore 4. Hydropneumatlcs Hydraulic flight control system design specifications require what total number of separate systems for operation of the primary flight controls? 1. One 2. Two 3. Three 4. Four In an open-center hydraulic system, what type of valve prevents pressure from building up until a demand is placed on the system? 1. A check valve 2. A bypass valve 3. A selector valve 4. A pressure relief valve In an open-center hydraulic system, the selector valve automatically returns to the neutral position and to open-center flow when the actuating mechanism reaches the end of its cycle and the system relief valve setting is reached. This is known as what type of selector valve? 1. Manually engaged disengaged 2. Manually engaged disengaged 3. Pressure engaged disengaged 4. Pressure engaged disengaged and pressure and manually and pressure and manually A closed-center hydraulic system with a variable displacement pump has what type of valve installed as a backup safety for over pressurization? 1. A check valve 2. A bypass valve 3. A relief valve 4. A selector valve 8-6. What type of hydraulic control valves and actuators operate the primary flight controls? 1. Single acting 2. Double acting 3. Hydropneumatic 4. Tandem construction IN ANSWERING QUESTIONS 8-7 AND 8-8, REFER TO FIGURE 7-2 IN THE TEXTBOOK. 8-7. 8-8. 8-9. 8-10. 8-11. The reservoir is pressurized by what force? 1. Ram air 2. Engine bleed air 3. Hydraulic pressure 4. Accumulator preload What valve shuts off flow to the secondary systems during flight? 1. The air valve 2. The check valve 3. The snubber valve 4. The isolation valve According to military specifications, all hydraulically operated systems considered essential to flight safety or landing must have provisions for emergency actuation. 1. True 2. False What component stores the supply of fluid for a hydraulic system? 1. An actuator 2. A reservoir 3. A selector valve 4. A hydraulic motor A finger strainer is installed in the filler neck of some nonpressurized reservoirs for what purpose? 1. To trap air that enters the system 2. To clean the fluid as the reservoir is filled 3. To clean the fluid as it leaves the reservoir 4. To serve as a reservoir pressure bypass 37