Q.1

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

  • The basic property used to identify objects, is called signature.
  • The ratio of the reflected flux to incident flux is called reflectance which varies fron 0 to 1
  • The surface from which emergent radiance is constant in all directions is called Lambertian surface.
  • All of these.
Q.2

Which one of the following frequencies is a GPS ?

  • L1 with frequency 1520 MHz
  • L1 with frequency 1575.42 MHz
  • L1 with frequency 1227.6 MHz
  • L1 with frequency 1280.43 Hz
Q.3

Fresh and pure snow reflectance

  • is very high in visible region
  • falls off steeply in the near-IR region
  • remains low for longer wave lengths
  • All of these
Q.4

The energy transported by the electromagnetic wave is proportional to :

  • the altitude of the wave
  • the square of the altitude of the wave
  • the cube of the altitude of the wave
  • the square roof of the amplitude
Q.5

A remote sensor photographic camera :

  • responses spectrum up to about 0.9 μ
  • does not cover short wave IR region
  • does not cover thermal IR region
  • All the above
Q.6

Snow cover on the earth surface :

  • gives the highest reflectance in the visible spectrum
  • shows marked variation in its reflectance characteristics
  • Shows side variation in the grain size
  • All the above
Q.7

Snow albedo is affected by :

  • wave length
  • grain size
  • solar zenith angle
  • snow pack thickness
  • All of these
Q.8

Pick up the correct statement from to following:

  • For complete temporal coherence, the waves must be mono chromatic.
  • For spatial coherence, the phase difference between two points in space is constant with time.
  • Superposition of the coherent waves produce interference
  • With 0 phase difference, the constructive interference takes place.
  • All of these
Q.9

The energy transported by the electromagnetic wave is proportional to :

  • the altitude of the wave
  • the square of the altitude of the wave
  • the cube of the altitude of the wave
  • the square roof of the amplitude
Q.10

The basic requirement of any sensor system, is :

  • radiometric resolution
  • spatial resolution
  • spectral resolution
  • temporal resolution
  • All of these
Q.11

The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:

  • 10-10 to 106 m
  • 10-8 to 106 m
  • 10-10 to 1010 m
  • 10-8 to 108 m
Q.12

"An Electromagnetic wave falls on to a boundary between two loss 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 :

  • Fresnel reflection
  • Fresnel refraction
  • Snell's law
  • None of these
Q.13

If 0 is the angle of scan measured from the nadir, the ground distance swept by the sensor IFOV is proportional to :

  • sin2θ
  • cos2θ
  • sec2θ
  • tan2θ
Q.14

Which one of the following helps to identify the objects on the earth surface ?

  • atmospheric window
  • signature
  • radiometric error
  • None of these
Q.15

Pick up the correct statement from the following :

  • Topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system
  • Topological characteristics of an object are independent of scale measurement
  • The three elements of topology are adjacency, containment, and connectivity
  • All of these
Q.16

Which one of the following parameters is considered to determine the reflectance of a vegetation canopy

  • Solar zenith angle
  • Azimuth angle
  • Look angle
  • Number and arrangement of leaves
  • All of these
Q.17

Which one of the following frequency regions is a part of sun's radiation?

  • Ultraviolet frequency region
  • Visible frequency region
  • Infrared frequency region
  • Radio frequency region
  • All of these
Q.18

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

  • the frequency
  • the reciprocal of the energy
  • the square of the frequency
  • the square root of the frequency
Q.19

Leaf reflactance depends primarily on :

  • the pigments
  • internal cell structure
  • equivalent water content
  • All of these
Q.20

Which one of the following statements is correct ?

  • Snow albedo falls at all wave length with the increase of grain size
  • The effect of grain size on reflection is maximum in the near-IR region
  • The effect of grain size on reflection is low in the visible region of the spectrum
  • All of these
Q.21

The various stages occuring in GPS system are described below :
Generation of an output to the user
Detection of the GPS signal
Processing the data in the built-in-computer
Decoding the GPS signal.
The correct sequence of the stages is :

  • 1, 2, 3, 4
  • 2, 3, 4, 1
  • 2, 4, 3, 1
  • 3, 1, 2 , 4
Q.22

Which one of the following statements is correct regarding the GPS satellites ?

  • The nominal altitude is about 20, 200 km
  • The inclination of axis satellite is 55°
  • The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)
  • All of these
Q.23

The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:

  • ozone hole
  • atmospheric window
  • ozone window
  • black hole
Q.24

The optical property of a water body depends on:

  • absorption by the disolved material
  • absorption by the suspended particulate matter
  • scattering by the surpended particulate matter
  • All of these
Q.25

The code based GPS receivers are generally used for:

  • Vehicle tracking
  • Land navigation
  • Trans movement
  • All of these
Q.26

A reduction of nitrogen nutrient in plants :

  • affects leaf colour
  • reduces pigment concentration
  • increase the visible reflectivity
  • All of these
Q.27

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

  • sensonrs
  • passive sensors
  • active sensors
  • None of these
Q.28

Formation of snow occurs if the cloud temperature is

  • just above the freezing point
  • at the freezing point
  • below the freezing point
  • None of these
Q.29

A passive sensor uses :

  • sun as the source of energy
  • flash light as a source of energy
  • its own source of energy
  • None of these
Q.30

Pick up the correct statement from the following

  • The ratio of the up flux and down flux just above the snow surface, is called albedo
  • Spectral albedo of snow is calculated for the semi-infinite snow thickness
  • Water equivalent height of snow is the height of water column obtained by melting snow.
  • A homogeneous snow pack is one whose average grain size does not vary with depth.
  • All of these
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