Science

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28 Questions - Developed by: Chrissy - The quiz is developed on: - 3.103 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
    89.2 %
    78.2 %
    58.2 %
    68.2 %
  • 3
    Assuming you have the following numbers { 4,4,1,2,6,5 }. The Mode is
    3.5
    2
    4
    5
  • 4
    A systematic error is
    The result from some limitation in the method of data collection
    The ability of a measurement to be consistently reproduced
    The result from some uniform problem in the way the data is collected
    The ability of a measurement to match the actual value of the quantity being measured
  • 5
    Assuming you have the following numbers { 47,67,20,30,90,40,87 }. The Median is
    30
    67
    40
    47
  • 6
    A random error is
    The ability of a measurement to match the actual value of the quantity being measured
    The ability of a measurement to be consistently reproduced
    The result from some uniform problem in the way the data is collected
    The result from some limitation in the method of data collection
  • 7
    Assuming you have the following numbers { 5,6,5,6 }. The Mean
    6.5
    5.75
    5.5
    5.25
  • 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 to recompute the Mean and the SD, because something went wrong
    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 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 push a material together
    Static force that tries to stretch a material
    Force that tries to twist a material
    Force that tries to deform part of 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
    8
    16
    2
  • 12
    The weight of its traffic of a bridge is known as the
    Live load
    Physical load
    Natural load
    Dead load
  • 13
    The Suspension bridge works much like a Cable-Stayed except the cables from the beam are connected _______
    By the keystone
    By another beam
    To another cable
    To a truss
  • 14
    When you test a bridge you must test it for
    Consider all Loads
    Live and Dead Load
    Live Load
    Environmental Load
  • 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
    Bad design
    Lack of maintenance
    Extreme hot weather
  • 17
    In a _________ bridge the beam is suspended from cables that are under tension from the bridge’s dead load
    Cable Stayed Bridge
    Cantilever Bridge
    Compression Bridge
    Arch Bridge
  • 18
    In the case of Therac 25, how many accidents of massive overdose were reported?
    18
    6
    60
    25
  • 19
    ______________ is high-energy radiation capable of producing ionization in substances through which it passes
    Ionizing Frequency
    Short Wave Radiation
    Ioninzing Radiation
    Energy 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
    Higher frequency
    Lower frequency
    Lower amplitude
  • 21
    A Sonogram (Ultrsound) is a good example of
    A treatment tool using ionizing radiation
    A treatment tool that does not use ionizing radiation
    A diagnosis tool that does not use ionizing radiation
    A diagnosis tool using ionizing radiation
  • 22
    Shorter wavelength actually means that both X and Gamma Rays have
    Lower frequency
    Higher frequency
    Lower amplitude
    Higher amplitude
  • 23
    Radiotherapy requires the use of sophisticated software to provide
    all of the above
    High accuracy
    Control of the radiation exposure time
    High precision
  • 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
    A wired CRT scan
    To generate a very high X Ray in the beam path
  • 26
    Computerized Axial Tomography (CAT) scan is a good example of
    A diagnosis tool using ionizing radiation
    A treatment tool using ionizing radiation
    a diagnosis tool that does not use ionizing radiation
    A treatment 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
    Higher pressure on the top of wing
    Reducing pressure
    Increasing the cargo load
    Lower pressure on the top of the wing