Dakota Gasification E&I Tech. 2 test study guide

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  1. Gaskets and O-rings are two kinds of _____ seals.
  2. O-rings require a(n)______to create a seal.
  3. ______compensate for temperature fluctuations in a control loop.
    Expansion loops
  4. _______ tubing is corrosion-resistant and suitable for high-temperature, high-pressure applications.
    Stainless Steel
  5. _____ achieve a tight seal by forcing the flared edge of the tubing up against the tapered end of the fitting body.
    Flared Fittings
  6. Leak detector fluid is essential when trying to locate leaks in instrument connections
  7. Metals that are to be soldered must be thoroughly cleaned ______ flux is applied.
  8. Flux and discoloration may be removed from the fitting after a joint has been made using?
    Emery cloths and wire brushes
  9. the preferred cutting tools for stainless steel tubing are
    tube cutters
  10. ______ are good tools for removing dirt, oil, and other residue from fittings and tubing before solder is applied.
    Emery cloths and lint-free cloths
  11. the materials of which mechanical seals are made must be _____ with the process materials of the applications in which they are used.
  12. Bends require ______ tubing than square corners.
  13. the wall thickness of tubing is determined by its
    Inside and outside diameters
  14. _______ tubing may be found as a single tube or as a bundle of single tubes within a protective sheath.
  15. flux residue can cause stainless steel tubing to
  16. applications in which pneumatic signals must be carried between instruments commonly use
    plastic tubing and stainless steel tubing
  17. compression fittings are commonly found on
    metal tubing and plastic tubing
  18. flared fittings are limited to use on
    metal tubing
  19. leak detector fluid is usually not required to check for ____ leaks.
  20. _____ provide a seal between flat mating surfaces.
  21. the gauge of a wire is determined by the ____ of the conductor.
  22. according to Ohm's law, if the voltage remains constant and resistance, current will
  23. a good solder joint should be
  24. metal bubbling up from the _____ in a coaxial cable connector indicates that the joint is solid
    access hole
  25. instrument signals passing through lines of flux from high-voltage equipment may be
    distorted, lost, and interrupted
  26. instrument grounds protect electronic signals from
    electric noise
  27. every electrical connection should be tested for ______ after any installation or repair work is done.
  28. it is essential to ______ before beginning any work on a circuit in the field.
    verify the circuit de-energized
  29. with coaxial cable connectors, the cable shield is usually inserted through a hole in the ________
    grounding tab
  30. check ______ terminal connections from the point at which te lost signal symptom appears
  31. the voltage rating of a wire is determine by the ______ of the conductor
  32. according to Ohm's law if voltage remains constant and resistance decreases, current will
  33. a poor solder joint will be
    dull and grainy
  34. metal bubbling up from the access hole in a coaxial cable connector indicates that the joint is
  35. _______ is used to protect instrument signals passing through lines of flux from high-voltage equipment from being distorted or lost
    shielded cable
  36. grounding a shielded cable at ______ can create a ground loop.
    Two points
  37. _____ tests should be done on every electrical connection after any installation or repair work is done.
  38. when verifying that a circuit is de-energized, it is important to test the operation of the multimeter _______ testing the circuit.
    before and after
  39. when installing a coaxial cable connector, the ________ is usually inserted through a hold in the grounding tab
  40. check sequential terminal connections from the point at which the lost signal symptom appears for _________
    all of the above
  41. _______ is the difference between the actual value of the measured variable and the value of the variable indicated by the instrument
    instrument error
  42. factors that should always be considered when analyzing an instrument's accuracy rating are _______ and _______.
    rangeability and mounting position
  43. errors that can be observed on a calibration curve or input/output graph include _____, _____, _____, and _____.
    zero shift, hysteresis, span error, and non-linearity
  44. characteristics that affect an instrument's accuracy in terms of the manufacturer's accuracy rating include dead band, linearity, ________, and ________.
    repeatability and hysteresis
  45. position errors may be caused by
    calibrating in position different from installation position, and mechanical deformation of instrument
  46. in order to permit the observation of linearity apart from the phenomena of hysteresis and dead band, it is necessary to plot and ______ curve.
    average curve
  47. _________ is the closeness of agreement among several consecutive measurements of an instrument's output values
  48. errors in interpretation may be caused by
  49. instrument errors that can usually be corrected during calibration include
    none of the above
  50. an instrument is _______ if it is capable of consistently providing repeatable values for a given input
  51. errors in _______ may be caused by misreading the value of scale subdivisions or incorrectly estimating reading in which pointer is located between divisions or subdivisions
  52. on an input/output graph, a zero shift line
    all of the above
  53. linearity is expressed as a
    percent of output
  54. with ______ , the response of the sensing element does not catch up to the input signal until the upper or lower ranges of the instrument are approached
  55. the smallest change in a measured variable to which an instrument will respond is a characteristic known as
  56. on an input/output graph, ______ is represented as a straight line that is at a different angle than the ideal line.
    span error
  57. with _______ , all of the output reading are either consistently high or consistently low throughout the entire range
    zero shift
  58. _______ is the ratio of the maximum to the minimum value of a measured variable that an instrument can measure within state accuracy to the minimum value of the measured variable that it can measure with state accuracy
  59. an instrument's repeatability is expressed as
    percentage of output span
  60. ________ is the ration of the instrument's maximum full scale range to its minimum full scale range.
  61. which of the following instrument errors can generally be adjusted
    zero shift and span error
  62. which of these occurrences normally requires that an instrument should be recalibrated?
    extended shutdown
  63. what is the signal range of an analog electronic pressure transmitter?
    4-20 mA
  64. which of the following is the first step in a good calibration procedure
    determination of signal range
  65. the proper formula used to determine the accuracy of a temperature transmitter is:
    Accuracy: (Deviation/Signal Span) x 100
  66. gain is a function of:
    input/output relationship
  67. in looking for indications of hysteresis, it is essential to:
    take upscale and downscale readings
  68. the accurate measurement and comparison of an instrument's inputs and outputs to a known standard is a definition of:
  69. the most accurate standards are those with the _______ tolerances.
  70. _______ standards use physical properties of matter and physical laws to provide a standard for comparison.
  71. calibration certification facilities use standards from ______ to calibrate their standards
  72. Manometers are________
    primary pressure standards
  73. manometers can indicate pressures in
    all of the above
  74. in order to obtain a measurement from a U-tube manometer, it is necessary to read ______.
    both legs
  75. to ensure accurate calibrations, gloves should be worn when handling the ______ used with deadweight testers.
  76. when selecting piston/cylinder assemblies, it is good practice to choose the ______ available tester range that includes the pressure range of the instrument to be calibrated.
  77. the operating fluid in pneumatic testers is a
  78. in a pneumatic deadweight tester, the pressure balance point is achieved by forces acting on a ______ assembly
    ball and nozzle
  79. the least accurate standards are those with the ______ tolerances.
  80. _______ standards are extremely precise instruments used for the calibration of plant instruments and systems.
  81. calibration certification facilities provide standards for ________ to use to calibrate their standards.
    industrial plants
  82. in a U-tube manometer, the reference level is the term used to describe the level apparent when pressure is _________.
    not being applied
  83. the ______ is the curve of the fill fluid level.
  84. A(n) _______ manometer is designed to provide greater accuracy for measuring small pressure changes
  85. ______ are sets consisting of precision parts that are not interchangeable with components in other sets.
    cylinders and weight systems
  86. flushing the connection before connecting the test instrument to be calibrated to a hydraulic deadweight tester's instrument connection port ensures that there are no _______ in the system.
    air bubbles
  87. the operating fluid in hydraulic testers is a
    liquid and oil
  88. in a hydraulic deadweight tester, the pressure balance point is achieved by forces acting on a _______ assembly.
    piston and cylinder
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Dakota Gasification E&I Tech. 2 test study guide
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