FOR. QUESTIONS 5-42 THROUGH 5-45, SELECT FROM COLUMN B THE DIAGRAM THAT IS DEFINED IN COLUMN A. A. DEFINITIONS B. DIAGRAMS 5-42. Shows the intern- 1. Combina- al parts of the tion components 2. Pictorial 5-43. Shows the general location of 3. Graphic components 4. Cutaway 5-44. Uses symbols, shows actual appearance,  and shows internal working  part 5-45. Uses symbols to show  components 5-46. Which  of  the  following  diagrams includes  the  interconnecting system  piping? 1. Combination 2. Pictorial 3. Graphic 4. Each of the above 5-47. Which,    if any, of the following diagrams  contains  pipe  sizes  and data  on  the  sequence  of  system operation? 1. Combination 2. Pictorial 3. Graphic 4. None of the above 5-48. A schematic diagram of a hydraulic  system  enables  a mechanic  to  accomplish  which  of the following tasks? 1. Understand  the  operation  of the system 2. Identify components of the system 3. Trace the flow of fluid through  the  system 4. All of the above 5-49. Which  of  the  following statements  about  an  oper-center hydraulic  system  is  false? 1. The  directional  control valves  are  connected  in parallel 2. There is no pressure in the system  when  the  actuators are idle 3. The system may have any number  of  subsystems  with  a directional  control  valves, for each 4. The  pump  circulates  fluid from  the  reservoir,  through the  directional  control valves,    and back to the reservoir 5-50. Why  are  closed-center  hydraulic systems the most widely used systems.? 1. They  provide  smooth operation  of  their  actuators 2. They  eliminate  continuous system  pressurization 3. They  operate  very  rapidly 4. They do all of the above Learning  Objective: Recognize Navy  applications,  component functions.   construction features,    and operating characteristics  of  hydraulic power drive systems. 5-51. Hydraulic  power  drives  are  used in the Navy to perform which of the  following  functions? 1. Drive and control winches, capstans , and windlasses 2. Train and elevate nearly all calibers of guns 3. Position rocket and missile launchers 4. All of the above 36