1-47. Refer to figure 2-18 in your textbook. If this were a practical  situation,  the  pressure in chamber A would be greater than that in chamber B by the amount  of  pressure  required  to 1. absorb  inertia 2. prevent  the  fluid  from  moving 3. overcome  friction 4. raise the pressure at an intermediate  point Learning  Objective: Recognize similarities  and  differences between  pneumatic  and  hydraulic fluid  power  systems,  and  indicate operating  characteristics  and component  functions  of  basic fluid power systems. 1-48. The  similarity  between  hydraulic and  pneumatic  fluid  power  systems is  correctly  indicated  by  which of  the  following  statements? 1. The  basic  components  of  the systems  are  essentially  the same 2. Both  systems  depend  upon internal  lubrication  by  the system  fluid 3. Both 1 and 2 above correctly indicate  the  similarity 4. The basic  components  of  the systems  are  identical  and interchangeable 1-49. Which  component  of  a  hydraulic fluid power system performs the same function as the receiver in a  pneumatic  fluid  power  system? 1. Reservoir 2. Compressor 3. Actuator 4. Selector  valve Learning  Objective: Identify the characteristic  of  liquid  that makes it desirable for use in hydraulic  systems  and  properties and  characteristics  that  must  be considered  in  selecting  a hydraulic  liquid  for  a  particular system,  including  related  data. 1-50. Liquids  rather  than  gases  are used  in  hydraulic  systems  because liquids are 1. more  compressible 2. less  compressible 3. more  expensive 4. less  corrosive  to  system components 1-51. A liquid that is satisfactory for use  in  a  hydraulic  system provides 1. a low viscosity index, good sealing  quality,  and lubricity 2. a high viscosity index, good sealing  quality,  and  a  low flashpoint 3. good  lubrication  and  sealing qualities,   and a viscosity that does not result in an increase  in  flow  resistance in” system piping 4. good  lubrication  and  a viscosity  that  decreases  as temperature  increases 1-52. The  viscosity  reading  of  a  liquid is expressed as Saybolt universal seconds (SUS),   which  represents the time,    in seconds, it takes for 60 cubic centimeters of the liquid  at  a  specified  temperature to pass through an orifice of given diameter. 1. True 2. False 1-53. A low V.I.    indicates that a liquid  will 1. maintain  a  constant  viscosity over a wide temperature range 2. vary  greatly  in  viscosity with  changes  in  temperature 3. vary only slightly in viscosity  with  changes  in temperature 4. have a response to temperature  changes  very  much like the response of paraffinic oil 6