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Civil Engineering :: Elements of Remote Sensing

  1. The object of photo-intepretation is:

  2. A.

    identification

    B.

    recognition of objects

    C.

    judging the significance of objects

    D.

    All of these

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  3. Pick up the correct statement from the following :

  4. A.

    The first man-made satellite, Sputnikl' was launched on 4th October, 1957

    B.

    The United State's Explorer 6 transmitted the first picture of the earth in August 1959

    C.

    Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960

    D.

    U.S.A.'s highly secret mission CORONA started the collection of intelligence photograpy in 1960

    E.

    All of these.

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  5. Which one of the following statement is correct ?

  6. A.

    Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation

    B.

    The rate of transfer of radiant energy is called flux and is expressed in watts.

    C.

    The radiant energy which falls upon a surface, is termed as irradianc

    D.

    The radiant energy which falls away from the surface is termed as radient exitance and is measured in Wm-2

    E.

    All of these

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  7. DGPS is based on the concept that bais errors in the position of locations in a given local area, are same if their distances are within

  8. A.

    25 km

    B.

    50 km

    C.

    75 km

    D.
    100 km
    E.

    1250 km

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  9. The reflectance from a surface is called specular reflection if it follows: .

  10. A.

    Snells's law

    B.

    Lambert's cosine law

    C.

    Planktan's law

    D.

    All of these

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  11. The changes in the reflectivity/emis-sivity with time, is called :

  12. A.

    spectral variation

    B.

    spatial variation

    C.

    temporal variation

    D.

    None of these

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  13.  

    According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on an other medium (refractive index m2);

  14. A.

    the angle of incidence is equal to the angle of refraction

    B.

    the angle of refraction (θr) is given by

    C.

    Both (a) and (b)

    D.

    neither (a) nor (b)

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  15.  

    Pick up the correct statement from the following:

  16. A.

    Phytoplankton contains photosyn-thetically active pigment.

    B.

    An increase of phytoplankton increases the back scattering in the green region

    C.

    An increase of phytoplankton absorbs the bule region rapidly

    D.

    An increase of phytoplankon decreases the back scattering in the green region

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  17.  

    Which one of the following factors does not affect the scale of the air photographs :

  18. A.

    focal length

    B.

    flying height

    C.

    ground elevation

    D.

    None of these

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  19. While propagating through homogeneous, isotropic media,

  20. A.

    directions of both the fields are orthogonal

    B.

    both the fields are at right angles to the direction of propagation.

    C.

    both (a) and (b)

    D.

    niether (a) nor (b)

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