# Multiple Choice Questions on Civil Remote Sensing – Set 06

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(A) 8
(B) 12
(C) 16
(D) 24

(A) C = v + λ
(B) C = λ/v
(C) C = vλ
(D) C = 1/λv

## Q3. Spatial variation in horizontal and vertical directions is caused due to:

(A) Physical weathering of rocks
(B) Chemical weathering of rocks
(C) Biological weathering of rocks
(D) All of these

## Q4. 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

## Q5. In GPS, receivers are used are;

(A) Electronic clocks
(B) Atomic clocks
(C) Quartz clocks
(D) Mechanical clocks

## Q6. The basic requirement of any sensor system is:

(B) Spatial resolution
(C) Spectral resolution
(D) All of these

## Q7. Rayleigh’s criteria for a rough surface is: (where letters carry their usual meanings).

(A) h > λ/Δ cos θ
(B) h = λ/8 cos θ
(C) h > λ/8 cos θ
(D) h < λ/8 cos θ

Answer: (C) h > λ/8 cos θ

(A) 130 km
(B) 230 km
(C) 250 km
(D) 500 km

## Q9. 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 μm
(B) 2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm
(C) 4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm
(D) All of these

## Q10. The value of energy quantum for radiation of any frequency is proportional to:

(A) The frequency
(B) The reciprocal of the energy
(C) The square of the frequency
(D) The square root of the frequency

(A) Color
(B) Symbology
(C) Legends
(D) South arrow

## Q12. “An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media”. This phenomenon is known as:

(A) Fresnel reflection
(B) Fresnel refraction
(C) Snell’s law
(D) None of these

## Q13. Which one of the following statements is correct?

(A) The function of an information system is to improve one’s ability to make decisions
(B) The information system is the chain of operations
(C) A map is a collection of stored, analyzed data, its stored information is suitability used in making decisions
(D) All the above

## Q14. The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:

(A) Sensors
(B) Passive sensors
(C) Active sensors
(D) None of these

## Q15. Pick up the correct statement from the following:

(A) Permeability is a measure of conducting the magnetic lines of force in the material
(B) Permeability is a measure of the extent to which magnetic lines of force can penetrate a medium
(C) Permeability is expressed as the ratio of the magnetic flux density (B) to the field strength of the magnetizing field
(D) All of these