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Civil Engineering :: Elements of Remote Sensing

  1. Formation of snow occurs if the cloud temperature is

  2. A.

    just above the freezing point

    B.

    at the freezing point

    C.

    below the freezing point

    D.
    None of these

  3. In case of reflection and refraction of electromagnetic radiation,

  4. A.

    angle of incidence = angle of refraction

    B.
    angle of incidence = angle of reflection
    C.

    angle of refraction = sum of the angles of incidence and refraction

    D.

    All the above


  5.  

    For interpolation of satellite data used for monitoring dynamic changes that occure on the earth surface, the most suitable orbit for the satellite is :

  6. A.

    circular orbit

    B.

    sun-synchronous orbit

    C.

    near polar orbit

    D.
    None of these

  7. The altitudinal distance of a geostationary satelite from the earth is about:

  8. A.

    26, 000 km

    B.
    30, 000 km
    C.
    36, 000 km
    D.

    44, 000 km


  9. Geodimeter is based on :

  10. A.

    propogation of modulated light waves

    B.

    propogation of infrared radiation

    C.

    the visible light as carrier with frequency of the order of 5 x 1014Hz

    D.

    high frequency radio waves.


  11. A passive sensor uses :

  12. A.

    sun as the source of energy

    B.

    flash light as a source of energy

    C.

    its own source of energy

    D.

    None of these


  13. The infrared portion of EMR lies between

  14. A.
    0.4 - 0.7 μm
    B.

    0.5 mm to lm

    C.

    0.7 - 1.3 μm

    D.

    0.7 to 14 μm


  15. Who coined the term, 'Remote sensing'.

  16. A.

    Evelyn L. Pruitt, a geographer

    B.
    Gaspard Felix Tournachon, a French scientist
    C.

    Wilbur Wright, an Italian sciencist

    D.

    None of these


  17. For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length lcoh is:

  18. A.

    130 km

    B.

    230 km

    C.

    250 km

    D.
    500 km

  19. Pick up the correct statement from the following:

  20. A.

    A graphical representation of spectral reflectance versis the various growth stages of a crop, depicts a phenologic pattern

    B.

    The changes in the polarisation of the radiation reflected or emitted by an object, is known as polarisation variation.

    C.

    The degree of polarisation is a characteristic of the object which helps in the identification of the object.

    D.

    Signatures only provide statistical nature and are not completely deterministic

    E.

    All of these