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Civil Engineering :: Elements of Remote Sensing

  1. The main functional blocks of a mul-tispectral scanner (MSS) are given below :
    1. Video processor
    2. Dispersive system
    3. Detector
    4. Signal conditioner
    5. Collecting optics
    Which one of the following sequences is correct?

  2. A.

    1, 4, 5, 3, 2

    B.

    5, 3, 2, 4, 1

    C.

    5, 2, 3, 1, 4

    D.

    1, 3, 2, 4, 5

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  3. Pick up the correct statement from the following:

  4. A.

    Photography was developed in 1826

    B.

    Balloons were used as stable platform for aerial photography in 1903

    C.

    The first aerial photography from an aerocraft was made by Willeur Wright in 1909 in Italy.

    D.

    All of these

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  5. Pick up the correct statement from the following:

  6. A.

    Electromagnetic wave is composed of electric and magnetic fields

    B.

    Electric and magnetic fields of electromagnetic wave remain mutually orthogonal and transverse to the direction of propagation.

    C.

    If the electromagnetic wave moves in the z-direction, its electric vector remains in the XY plane along any direction.

    D.

    Polirization defines the orientation of the fields

    E.

    All of these

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  7. The information system is the chain of the following operations,
    1. Collection of data
    2. Planning the observations
    3. Analysis of data
    4. Decision making process Which one of the chains is correct ?

  8. A.

    4, 1, 2, 3

    B.

    2, 1, 3, 4

    C.

    3, 2, 1, 4

    D.

    1, 3, 4, 2

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  9. Polarising angle (i) and refractive index (μ) of the reflecting surface are related by:

  10. A.

    sin i = μ

    B.

    cos i = μ

    C.

    tan i = μ

    D.

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  11. Pick up the incorrect statement regarding the optical infrared region of the electromagnetic spectrum from the following :

  12. A.

    visible region, 0.4 μm - 0.7 μm

    B.

    short wave infrared region, 0.7 μ m - 1.5 μm

    C.

    near infrared region, 1.5 μ m - 3.0 μm

    D.

    microwave infrared region, 3.0 μ m - 8.0 μm

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  13. Phytoplanktons :

  14. A.

    re microscopic plants

    B.

    are the first link in all the aquatic and marine food chains

    C.

    convert solar energy, dissolved carbon and nitrogen into organic biomass

    D.

    All of these

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  15. The maximum absorption of solar radiation due to ozone occurs at wave lengths:

  16. A.

    shorter than 0.3 μm

    B.

    shorter than 0.2 μm

    C.

    greater than 0.3 μm

    D.

    None of these

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  17. Which one of the following statements is correct to remote sensing?

  18. A.

    The basic property used to identify objects, is called signature.

    B.

    The ratio of the reflected flux to incident flux is called reflectance which varies fron 0 to 1

    C.

    The surface from which emergent radiance is constant in all directions is called Lambertian surface.

    D.

    All of these.

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  19.  

    Which one of the following frequencies is a GPS ?

  20. A.

    L1 with frequency 1520 MHz

    B.

    L1 with frequency 1575.42 MHz

    C.

    L1 with frequency 1227.6 MHz

    D.

    L1 with frequency 1280.43 Hz

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