Science

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28 Questions - Developed by: Chrissy - The quiz is developed on: - 3.030 taken - User Rating: 3.6 of 5.0 - 5 Votes

  • 1
    The Standard Deviation is
    a measurement of accuracy
    The same as the mean
    A measurement of precision
    The same as the variance
  • 2
    If it is possible to accurately measure something with a normal distribution, and all you errors are truly random and you have taken enough data then__________ of your data should fall in the range of the value of the Mean +/- one SD
    58.2 %
    78.2 %
    68.2 %
    89.2 %
  • 3
    Assuming you have the following numbers { 4,4,1,2,6,5 }. The Mode is
    4
    2
    5
    3.5
  • 4
    A systematic error is
    The ability of a measurement to be consistently reproduced
    The result from some limitation in the method of data collection
    The ability of a measurement to match the actual value of the quantity being measured
    The result from some uniform problem in the way the data is collected
  • 5
    Assuming you have the following numbers { 47,67,20,30,90,40,87 }. The Median is
    47
    40
    30
    67
  • 6
    A random error is
    The result from some uniform problem in the way the data is collected
    The ability of a measurement to be consistently reproduced
    The result from some limitation in the method of data collection
    The ability of a measurement to match the actual value of the quantity being measured
  • 7
    Assuming you have the following numbers { 5,6,5,6 }. The Mean
    6.5
    5.25
    5.75
    5.5
  • 8
    Out of a universe of 100, John took the following data {21,22,22,22,22,22,23,24,25,22} and got a Mean+-SD interval values of 21.32 to 23.67. Assuming he does not have systematic errors, What does he have to do?
    He has a good estimate of the population mean, he does not need to take more data
    Get a better calculator, or at least an easier one
    He has to recompute the Mean and the SD, because something went wrong
    He still has to take more data
  • 9
    According to Einstein knowledge deals more with _____________ than with information
    Facts
    Truth
    Experience
    Tautology
  • 10

    Tension is a
    Force that tries to twist a material
    Force that tries to push a material together
    Force that tries to deform part of a material
    Static force that tries to stretch a material
  • 11
    If the distance between two objects is 4 and their masses are 4 and 16 respectively, then their mutual attraction would be proportional to:
    4
    2
    16
    8
  • 12
    The weight of its traffic of a bridge is known as the
    Natural load
    Dead load
    Live load
    Physical load
  • 13
    The Suspension bridge works much like a Cable-Stayed except the cables from the beam are connected _______
    To a truss
    To another cable
    By the keystone
    By another beam
  • 14
    When you test a bridge you must test it for
    Live and Dead Load
    Environmental Load
    Live Load
    Consider all Loads
  • 15
    If the distance between two objects is 2 and their masses are 5 and 4 respectively, then their mutual attraction would be proportional to:
    20
    10
    5
    4
  • 16
    9 The reason for the failure of the Falls View Bridge Disaster in Ohio in 1938 was
    Diminishing traffic
    Lack of maintenance
    Bad design
    Extreme hot weather
  • 17
    In a _________ bridge the beam is suspended from cables that are under tension from the bridge’s dead load
    Arch Bridge
    Cantilever Bridge
    Cable Stayed Bridge
    Compression Bridge
  • 18
    In the case of Therac 25, how many accidents of massive overdose were reported?
    18
    25
    6
    60
  • 19
    ______________ is high-energy radiation capable of producing ionization in substances through which it passes
    Energy Radiation
    Short Wave Radiation
    Ionizing Frequency
    Ioninzing Radiation
  • 20
    Gamma Rays as well as X rays are similar to radio waves, however they differ (amongst other things) in that they have
    Higher amplitude
    Lower amplitude
    Lower frequency
    Higher frequency
  • 21
    A Sonogram (Ultrsound) is a good example of
    A treatment tool that does not use ionizing radiation
    A diagnosis tool that does not use ionizing radiation
    A treatment tool using ionizing radiation
    A diagnosis tool using ionizing radiation
  • 22
    Shorter wavelength actually means that both X and Gamma Rays have
    Lower amplitude
    Higher frequency
    Higher amplitude
    Lower frequency
  • 23
    Radiotherapy requires the use of sophisticated software to provide
    all of the above
    High precision
    High accuracy
    Control of the radiation exposure time
  • 24
    The Therac 25 accidents occurred from
    1985-1987
    1975-1977
    1995-1997
    2005-2007
  • 25
    The dual mode operation of the Therac 25 requires
    A single action beam
    A non linear accelerator
    To generate a very high X Ray in the beam path
    A wired CRT scan
  • 26
    Computerized Axial Tomography (CAT) scan is a good example of
    A treatment tool that does not use ionizing radiation
    A diagnosis tool using ionizing radiation
    A treatment tool using ionizing radiation
    a diagnosis tool that does not use ionizing radiation
  • 27
    The Therac 25 had a
    25 treatment guns aligned using a PDP 11
    25 feedback channels
    None of the above
    25 mev beam controlled with a PDP 11
  • 28
    Lift can be obtained in airplanes by means of
    Reducing pressure
    Lower pressure on the top of the wing
    Higher pressure on the top of wing
    Increasing the cargo load