Assignment   4 Textbook  Assignment: “Measurement  and  Pressure  Control  Devices,”  Chapter  8: “Reservoirs,  Strainers,  Filters,  and  Accumulators,”  chapter  9; and    “Actuators,”    chapter  10. 4-1. 4-2. Learning  Objective: Recognize the  construction,  operational characteristics,  and  uses  of different  types  of  fluid  pressure indicators, thermometers,  and control switches. The  pressure  sensing  elements  of Bourdon-tube  gauges  are  commonly made in which of the following shapes? 1. The letter C 2. Helical 3. Spiral 4. All of the above Which,    if  any,    of the following statements  correctly  explains  the action  of  a  C-shaped  Bourdon tube? 1. 2. 3. 4. Centrifugal  force  of  fluid flowing  through  the  curved tube causes it to straighten out Pressure applied to the tube causes its cross section to become  more  circular,  causing It to straighten out Pressure applied to the tube causes its cross section to become  more  circular,  causing it to contract None of the above 4-3. A duplex Bourdon gauge is composed of 1. one  indicator  dependent  upon both of two separate mechanisms 2. two  separate  and  independent mechanisms  and  indicators 3. one mechanism with one indicator  showing  current pressure and a second indicator  showing  the  maximum pressure  reached 4. one mechanism with one indicator  showing  pressure  in pounds per square inch (psi) and a second indicator showing the load on a ram in tons 4-4. A  Bourdon-tube  differential pressure gauge is composed of 1. one  indicator  dependent  upon both of two separate mechanisms 2. two  separate  and  independent mechanisms  and  indicators 3. one mechanism with one indicator  showing  current pressure and the second indicator  showing  the  maximum pressure  reached 4. one mechanism with one indicator  which  can  register pressure  either  above  or below  atmospheric  pressure 4-5. Which  of  the  following  gauges  can be used to measure the differential  pressure  across  a strainer? 1. Duplex gauge 2. Differential  pressure  gauge 3. Both 1 and 2 above 4. Compound gauge 24