elements of remote sensing MCQs – Page 3

Practise focused elements of remote sensing questions with marked answers for exam preparation and subject revision.

elements of remote sensing Mcqs

41. Pick up the important characteristic of a target which facilitates its identification from the following ?
0

A. Temporal variation

B. Spectral variation

C. Spatial variation

D. All of these

42. Pick up the correct statement from the following?
0

A. An increase of phytoplankton absorbs the bule region rapidly

B. Phytoplankton contains photosynthetically active pigment

C. An increase of phytoplankton decreases the back scattering in the green region

D. An increase of phytoplankton increases the back scattering in the green region

43. According to the Snells law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?
0

A. The angle of incidence is equal to the angle of refraction

B. The angle of refraction r) is given by sin i

C. Both A. and B.

D. Neither A. nor B.

44. Remote sensing techniques make use of the properties of ______________ emitted, reflected or diffracted by the sensed objects?
0

A. Electric waves

B. Wind waves

C. Electromagnetic waves

D. Sound waves

45. Which one of the following attributes is not associated with digital maps_______________?
0

A. Legends

B. Symbology

C. South arrow

D. Colour

46. The coherence length over which there is a strong relationship between amplitudes is_________________?
0

A. None of these

B. Inversely proportional to the bandwidth

C. The square of the bandwidth

D. Directly proportional to the bandwidth

47. Pick up the correct statement from the following ?
0

A. For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the aerial photograph

B. The scale of the aerial photograph depends upon the scale of the topography

C. The feature at the principal point has no height displacement

D. All of the above

48. Which one of the following residual biases involves the GPS accuracy ?
0

A. Satellite dependent biases due to uncertainty in the orbital parameters of the satellite

B. Receiver -dependent biases due to clock stability with line

C. All the above

D. Signal propagation biases due to the sphere and troposphere propagation

49. A passive sensor uses ________________?
0

A. Flash light as a source of energ

B. Its own source of energy

C. Sun as the source of energy

D. None of these

50. Which one of the following parameters is considered to determine the reflectance of a vegetation canopy ?
0

A. Solar zenith angle

B. All of these

C. Azimuth angle

D. Look angle

51. Critical angle of electromagnetic radiation takes place if__________________?
0

A. Angle of incidence is equal to 90

B. Angle of incidence is equal to angle of refraction

C. Angle of incidence is greater than the angle of refraction

D. Angle of refraction is equal to 90

52. Pick up the correct statement from the following_________________?
0

A. All of these

B. When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed

C. When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed

D. When the electric vector is in the plane of incidence, vertical polarisation is formed

53. Pick up the correct statement from the following?
0

A. Frequency of a wave is measured in Hertz (Hz)

B. Amplitude of a wave is the height of its crust from the mid-point

C. Frequency is the number of wave crests passing a fixed point in one second

D. All of these

54. The value of energy quantum for radiation of any frequency is proportional to________________?
0

A. The reciprocal of the energy

B. The square of the frequency

C. The square root of the frequency

D. The frequency

55. The changes in the reflectivity/emissivity with time, is called ?
0

A. Temporal variation

B. None of these

C. Spectral variation

D. Spatial variation

56. Geodimeter is based on_________________?
0

A. The visible light as carrier with frequency of the order of 5 1014 Hz

B. Propagation of modulated light waves

C. Propagation of infrared radiation

D. High frequency radio waves

57. In case of reflection and refraction of electromagnetic radiation ?
0

A. Angle of incidence = angle of refraction

B. Angle of refraction = sum of the angles of incidence and refraction

C. All the above

D. Angle of incidence = angle of reflection

58. Which one of the following statement is incorrect regarding the electromagnetic radiation ?
0

A. The oscillation of charged particles sets up changing electric fields

B. These are produced by the motion of electric charge

C. The changing electric fields induce the changing magnetic fields in the surrounding medium

D. None of these

59. For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is______________?
0

A. Sun-synchronous orbit

B. None of these

C. Near polar orbit

D. Circular orbit

60. The altitudinal distance of a geostationary satellite from the earth is about_________________?
0

A. 30,000 km

B. 44,000 km

C. 26,000 km

D. 36,000 km

Previous Next

Showing 41 to 60 of 86 mcqs