PTEC 132 - Exam 5 - Spring 14 - Chapter 11

30 Questions | Total Attempts: 436

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PTEC 132 - Exam 5 - Spring 14 - Chapter 11

In physics, we get to understand how different tools and machines have various tools function. A valve acts a way to control entry or exit if a substance. This is a PTEC 132 - Exam 5 - Spring 14 – Chapter 11. Why don’t you give it a try and get to review some of the things that may be covered in the upcoming exam? All the best!


Questions and Answers
  • 1. 
    During a power failure, you want a valve that is adding material to a tank to stop flowing. Therefore, you would want the valve to be a/an 
    • A. 

      Air-to-open valve.

    • B. 

      Air-to-close valve.

    • C. 

      Fail-in-place.

    • D. 

      It doesn’t matter, the power is off.

  • 2. 
    A/an  _______ is a device that reacts to an instrument signal by creating linear or rotational motion. 
    • A. 

      Modulator

    • B. 

      Agitator

    • C. 

      Controller

    • D. 

      Actuator

  • 3. 
    _____________ provide excellent modular control with or without a positioner.
    • A. 

      Cylinder type actuators

    • B. 

      Control valve actuators

    • C. 

      Dual positioner thrusters

    • D. 

      Spring and diaphragm actuators

  • 4. 
    If a control valve and its spring and diaphragm actuator are both direct acting, then it will __________ if air is lost to it. 
    • A. 

      Fail open

    • B. 

      fail closed

    • C. 

      fail intermediate

    • D. 

      Fail in the last position

  • 5. 
    A valve positioner can do which of the following:
    • A. 

      Position the valve stem in reference to the instrument signal.

    • B. 

      Reverse the direction of flow through the valve.

    • C. 

      Reverse the action of the signal received from the controller.

    • D. 

      Both a and b

    • E. 

      . Both a and c

  • 6. 
    The three pressure gauges on a pneumatic valve positioner are:
    • A. 

      Signal, Output and Supply

    • B. 

      Signal, Input and Supply

    • C. 

      Input, Output and Valve

    • D. 

      Input, Output and Position

  • 7. 
    A controller’s output signal can be reversed by 
    • A. 

      An I/P transducer.

    • B. 

      reversing the lead wires.

    • C. 

      the valve positioner.

    • D. 

      Both a and b

  • 8. 
    In the processing industry, the most common control valve body style in theButterfly.
    • A. 

      Butterfly.

    • B. 

      Three-Way.

    • C. 

      Globe

    • D. 

      Double-port .

  • 9. 
    An I/P or valve positioner will reverse an increasing signal from the __________ to a decreasing signal to the __________ __________.
    • A. 

      Controller, control valve

    • B. 

      System, actuator device

    • C. 

      Damper, motor drive

    • D. 

      spring, fail safe

  • 10. 
    Which of the following is considered to be the device that directly controls the manipulated variable.
    • A. 

      The measuring element

    • B. 

      The transmitting elemen

    • C. 

      The comparing and controlling element

    • D. 

      The final control element

  • 11. 
    The _________ is the device that provides motion to the valve.
    • A. 

      Spring

    • B. 

      Bonnet

    • C. 

      Body

    • D. 

      Actuator

  • 12. 
    The stem on a control valve that is sticking will ________ rather than move smoothly.
    • A. 

      Jump

    • B. 

      twist

    • C. 

      Pivot

    • D. 

      Bend

  • 13. 
    A control valve with a spring and diaphragm actuator is said to air-to-close, if there is a power loss (loss of actuating energy) the valve will:
    • A. 

      be forced completely closed by the spring.

    • B. 

      Be forced completely open by the spring.

    • C. 

      remain in its last position.

    • D. 

      Hunt for the best option.

  • 14. 
    Actuators and valves are either direct acting or ______________ acting.
    • A. 

      Forward

    • B. 

      Reverse

  • 15. 
    The tag on a pneumatically actuated control valve identifies it as air-to-open. If the positioner has been configured (set) to reverse the signal, then the valve will fail _________.  
    • A. 

      Closed

    • B. 

      Open

    • C. 

      In last state

  • 16. 
    A butterfly valve is opened with a _________ _________.  
    • A. 

      rotary motion

    • B. 

      Sliding motion

  • 17. 
    A double acting cylinder type actuator always requires a positioner.
    • A. 

      True

    • B. 

      False

  • 18. 
    If a spring and diaphragm actuator loses air it will be forced into its fail-safe position.
    • A. 

      True

    • B. 

      False

  • 19. 
    A valve positioned is used to do all of the following except:
    • A. 

      Provide split range control

    • B. 

      Position the valve

    • C. 

      Mimic a valve trim type

    • D. 

      Reverse the action

    • E. 

      Send a signal back to the controller

  • 20. 
    A tag with the label ATC/atc, the ATC represents the _________and the atc represents the ________.
    • A. 

      Positioner, valve

    • B. 

      Actuator, valve

    • C. 

      Valve, positioner

    • D. 

      Valve, actuator

  • 21. 
    An actuator accessory used to manually override the actuator or to limit its motion is called a _______.
    • A. 

      switch

    • B. 

      Handwheel

    • C. 

      manual valve

    • D. 

      Manual actuator

  • 22. 
    The top portion of the valve that connects the valve to the actuator and can be removed to allow entry into the valve body cavity is called a ___________.
    • A. 

      Spring

    • B. 

      Bonnet

    • C. 

      Seat

    • D. 

      Actuator

  • 23. 
    The pushing rod that transfers the motion of the actuator to the valve plug is called a ___________.
    • A. 

      Spring

    • B. 

      Bonnet

    • C. 

      Stem

    • D. 

      Actuator

  • 24. 
    The stationary part of the valve trim connected to the body comes in contact with the valve plug is called the __________.
    • A. 

      Actuator

    • B. 

      Bonnet

    • C. 

      Spring

    • D. 

      Seat

  • 25. 
    What do these symbols represent?
    • A. 

      Pressure reducing regulator

    • B. 

      Back pressure regulator

    • C. 

      Reverse valve positioner

    • D. 

      Forward valve positioner

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