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Civil Engineering Objective Questions { Elements Of Remote Sensing }



22. The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths :
A. 0.4 to 1.3 1.5 to 1.8, 2.2 to 2.6 gm
B. 2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 pm
C. 4.2 to 5.0, 7.0 to 15.0 gm and 1 cm to 30 cm
D. All of these

23. The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,
A. reduces the contrast of the image and also its sharpness
B. increases the contrast of the image but reduces .the sharpness
C. increases both the contrast and sharpness
D. reduces the contrast but increases the sharpness

24. Pick up the correct statement from the following :
A. Atmospheric windows are the spectral regions of the electromegnetic radiation through which they pass without much attenuation.
B. The scattered/diffused radiance entering the field of view of a remote sensor other than that from the required target, is called path radiance
C. The difference between the apparent radiance of the ground targets and intrinsic surface radiance, is termed as radiometric error
D. All of these

25. Depending upon the nature of the targeted object and the wave length of the electromagnetic radiation incident on it, the radiation gets :
A. reflected
B. absorbed
C. re-radiated
D. All of these

26. Which one of the following helps to identify the objects on the earth surface ?
A. atmospheric window
B. signature
C. radiometric error
D. None of these

27. Pick up the important characteristic of a target which facilitates its identification from the following :
A. spectral variation
B. spatial variation
C. temporal variation
D. All of these

28. The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is callea
A. spectral variation
B. spatial variation
C. temporal variation
D. None of these

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