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Civil Engineering Objective Questions { Elements Of Remote Sensing }



1. Crop Acreage and Production Estimation (CAPE) was funded and taken up in 1983 by:
A. USA
B. European Union
C. Russia
D. India

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

3. Which one of the following statements is correct?
A. at radians equal to 1800.
B. The cone subtended by an area on the sphere at the centre, is called the solid angle.
C. The solid angle is equal to the ratio of the area on the sphere and the square of the radius of the sphere.
D. All of these

4. Which one of the following quantities forms the basis of radiometery?
A. Radiant energy (Q)
B. Radiant flux ((1))
C. Radiant intensity (I)
D. All of these

5. The reflectance from a surface is called specular reflection if it follows:
A. Snells's law
B. Lambert's cosine law
C. Planktan's law
D. All of these

6. Rayleigh's criteria for a rough surface is, where letters carry their usual meanings.:
A. h > XIA cos 0
B. h = 2J8 cos 0
C. h > X/8 cos 0
D. h < A./8 cos 0

7. The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:
A. reflectance
B. reflectance factor
C. albedo
D. none of these

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