Q.1

The normal altitude of GPS satellite is about

  • 16, 200 km
  • 20, 200 km
  • 24, 400 km
  • 36, 100 km
Q.2

Pick up the correct statement from the following:

  • Electromagnetic wave is composed of electric and magnetic fields
  • Electric and magnetic fields of electromagnetic wave remain mutually orthogonal and transverse to the direction of propagation.
  • If the electromagnetic wave moves in the z-direction, its electric vector remains in the XY plane along any direction.
  • Polirization defines the orientation of the fields
  • All of these
Q.3

Consider the following statements regarding the satellite imaging :
The satellite orbit is fixed in the inertial space
During successive across-track imaging, the earth rotates beneath the sensor
The satellite images a skewed area
Which one of the following statements is/are correct ?

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

Pick up the correct statement from the following:

  • The refractive index of a medium varies according to the wavelength of the radiation,
  • The variation of the refractive index with wave length, is called dispersion,
  • The splitting of colours of white light by passing through a prism, is caused due to dispersion.
  • All the these
Q.5

Electromagnetic waves are characterised by :

  • frequency
  • wave length
  • intensity
  • direction of travel and plane of polarisation.
  • All of these
Q.6

The emission of electrons from a metal plate exposed to light depends on the :

  • intensity of the light
  • frequency of light
  • both (a) and (b)
  • neither (a) nor (b)
Q.7

Which one of the following statements is not correct?

  • GIS technology is the same as traditional mapping
  • GIS technology is a tool box for processing maps and fundamental concepts for spatial measurement
  • GIS technology contains analytic capabilities for overlaying maps
  • GIS technology is capable to study the environmental surrondings
Q.8

Repetitive observations of the same area at equal interval of time, are useful to monitor the dynamic phenomena :

  • Cloud evolution
  • Vegetative cover
  • Snow cover
  • Forest fires
  • All of these
Q.9

Identification of crops is affected by:

  • the spectral characteristics of the sensor
  • the spatial characteristics of the sensor
  • the radio metric characteristics of the sensor
  • All of these
Q.10

The information system is the chain of the following operations,
Collection of data
Planning the observations
Analysis of data
Decision making process Which one of the chains is correct ?

  • 4, 1, 2, 3
  • 2, 1, 3, 4
  • 3, 2, 1, 4
  • 1, 3, 4, 2
Q.11

Which one of the following statements is correct?

  • π radians equal to 180°.
  • The cone subtended by an area on the sphere at the centre, is called the solid angle.
  • The solid angle is equal to the ratio of the area on the sphere and the square of the radius of the sphere.
  • The unit of the solid angle is steradian (Sr)
  • All of these
Q.12

Which one of the following attributes is not associated with digital maps

  • colour
  • symbology
  • legends
  • south arrow
Q.13

The solid angle subtended by the sphere is :

Q.14

The range measurements in GPS are made with :

  • 3 L - band frequencies
  • 2 L - band frequencies
  • 2 C - band frequencies
  • 3 C - band frequencies
Q.15

With the increase of turbidity, the muddy water appears brown due to the shift of the upward radiance peak towards :

  • red
  • green
  • yellow
  • blue
Q.16

Orbital radius of GPS satellites is approximately:

  • 15,200 km
  • 26,600 km
  • 18,400 km
  • 36,000 km
Q.17

In sun light, water rich in phytoplanktons appears :

  • red
  • green
  • brown
  • blue
Q.18

For accurate position fix, the three satellites:

  • must be along a common arc
  • must be in vertical line above the receiver
  • must be widely separated and well distributed
  • must be such that one satellite is overhead of the receiver and other two widely separated
Q.19

'A time varying magnetic field produces an electric field'. This phenomenon is known as

  • Newton's law
  • Kirchofflaw
  • Ampere Maxwell law
  • Faraday's law
Q.20

Remote sensing techniques are being usefully employed for the purpose of:

  • improving natural resource management
  • land use
  • protection of the environment
  • All of these
Q.21

Which one of the following can travel through empty space :

  • sound waves
  • water waves
  • electromagnetic waves
  • spring waves
Q.22

The semi-infinite snow albedo is proportional to the square root of the grain radius :

  • in the 0.2 to 0.4 μm wave length region
  • in the 0.4 to 0.8 μm wave length region
  • in the 0.8 to 1.2 μm wave length
  • None of these
Q.23

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

  • visible region, 0.4 μm - 0.7 μm
  • short wave infrared region, 0.7 μ m - 1.5 μm
  • near infrared region, 1.5 μ m - 3.0 μm
  • microwave infrared region, 3.0 μ m - 8.0 μm
Q.24

In GPS, receivers are used are ;

  • electronic clocks
  • atomic clocks
  • quartz clocks
  • mechanical clocks
Q.25

Pick up the correct statement from the following:

  • Water molecules and salt-ions in the ocean scatter the lower wave length more
  • An increase in the back scattering coefficient with shorter wave length gives a deep blue colour for clear oceanic water
  • The ratio of the upwelling irradiance just below the surface and downwelling irradiance just above the surface is called reflectance ratio.
  • All of these
Q.26

For obtaining accurate distance of the satellite

  • the GPS receiver slides its codes backwards until it synchronises with the satellite signals
  • the signal arrival time is corrected for tropospheric and ionospheric delays
  • the carrier phase measurement technique is adopted
  • All of these
Q.27

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

  • 1, 4, 5, 3, 2
  • 5, 3, 2, 4, 1
  • 5, 2, 3, 1, 4
  • 1, 3, 2, 4, 5
Q.28

Depending upon the nature of the targeted object and the wave length of the electromagnetic radiation incident on it, the radiation gets :

  • reflected
  • absorbed
  • re-radiated
  • transmitted through
  • All of these
Q.29

Pick up the correct statement from the following:

  • The wave length of gamma rays is 10-10 m
  • The wave length of radio rays is 106 m
  • The visible length occupies a small portion of the electromagntic spectrum extending roughly from 0.4 μ m to 0.7μm wave length.
  • All of these
Q.30

GPS has been widely recognized as accurate, fast and cost-effective method for the following:

  • Collection of the geographic coordinate data used in GIS
  • for movement of navigation
  • For determination of precise orbit and altitude of low earth orbiting satellites
  • All of these
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