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9 Cards in this Set
- Front
- Back
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A control valve: 1) Is always normally closed 2) Can, by itself, be part of a split range control loop 3) Is nearly always reverse acting 4) Is a form of variable resistance in a piping system 5) Must be part of a cascade control system |
Is a form of variable resistance in a piping system |
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The output pressure signal of a transmitter is usually: 1) The same as the primary element output signal 2) Inversely proportional to nozzle pressure 3) Direct and proportional to nozzle pressure 4) A function of supply pressure 5) Fed to the final element of a loop |
Direct and proportional to nozzle pressure |
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An automatic/manual transfer station: 1. Allows switching from auto to manual 2. Allows switching from manual to auto 3. Is located downstream of the controller 4. Is located upstream of the final control element 1) 1, 2, 3 2) 2, 3, 4 3) 1, 2, 3, 4 4) 1, 2 5) 3, 4 |
4) 1, 2 |
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Cascade control entails the use of: 1) Two controllers, one transmitter and two valves 2) One controller, two transmitters and two valves 3) Two controllers, two transmitters and one valve 4) Two controllers, two transmitters and two valves 5) One controller, one transmitter and two valves |
Two controllers, two transmitters and one valve |
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A circular chart recorder: 1) Is used on a computer screen 2) Does not provide a permanent record 3) Provides a different function to a strip chart 4) May incorporate a bourdon tube 5) Is a later design than a strip chart |
May incorporate a bourdon tube |
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A CRT trend display: 1) Allows a view of one process variable at a time 2) Mimics a trend chart 3) Is normally mounted beside the final control element 4) Is not of interest to the operator 5) Allows only a fixed or nonadjustable time period |
Mimics a trend chart |
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Control valves: 1) Require a pressure drop across the valve to maintain flow 2) Consist of a valve body and accommodator 3) Have one major component 4) React to controller input 5) Provide a fixed resistance to flow |
Require a pressure drop across the valve to maintain flow |
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A recorder utilizing a spiral Bourdon tube will have a pen movement: 1) Proportional to the change in tube pressure 2) Linear to the tube travel 3) Range of 0 to 24 hours 4) Angular to the tube travel 5) 0 to 7 days |
Proportional to the change in tube pressure |
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The common standard control modes for a plant control system are: 1) Proportional and reset 2) Reset, integral, and rate 3) Integral and derivative 4) Proportional, reset, and integral 5) Derivative, proportional, and integral |
Derivative, proportional, and integral |
