elements of remote sensing MCQs – Page 4

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

elements of remote sensing Mcqs

61. Orbital radius of GPS satellites is approximately ___________________?
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A. 26,600 km

B. 36,000 km

C. 15,200 km

D. 18,400 km

62. The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as__________________?
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A. Ozone hole

63. Which one of the following statement is correct ?
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A. All of these

B. The rate of transfer of radiant energy is called flux and is expressed in watts

C. The radiant energy which falls upon a surface is termed as irradiance

D. Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation

64. Consider the following statements regarding the satellite imaging_________________?
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A. During successive across-track imaging, the earth rotates beneath the sensor

B. The satellite orbit is fixed in the inertial space

C. The satellite images a skewed area</strong>

D. ch one of the following statements is/are correct?

65. A reduction of nitrogen nutrient in plants_______________?
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A. All of these

B. Reduces pigment concentration

C. Increase the visible reflectivity

D. Affects leaf colour

66. Pick up the correct statement from the following ?
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A. The three elements of topology are adjacency, containment, and connectivity

B. All of these

C. Topological characteristics of an object are independent of scale measurement

D. Topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system

67. Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its_______________________?
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A. Six ground stations

B. Three ground stations

C. Four ground stations

D. Five ground stations

68. Pick up the correct statement from the following?
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A. The ratio of the up flux and down flux just above the snow surface, is called albedo

B. All of these

C. Spectral albedo of snow is calculated for the semi-infinite snow thickness

D. Water equivalent height of snow is the height of water column obtained by melting snow

69. The basic requirement of any sensor system is___________________?
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A. Radiometric resolution

B. Spatial resolution

C. Spectral resolution

D. All of these

70. Earth observations from a satellite platform provide____________?
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A. All of these

B. Constant solar zenith angles and similar illumination conditions

C. Synoptic view of a large area

D. Repetitive observations of the same area with intervals of a few minutes to a few weeks

71. Pick up the correct statement from the following ?
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A. Permeability is expressed as the ratio of the magnetic flux density B. to the field strength of the magnetizing field

B. Permeability is a measure of conducting the magnetic lines of force in the material

C. All of these

D. Permeability is a measure of the extent to which magnetic lines of force can penetrate a medium

72. Which one of the following statements is correct ?
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A. All of these

B. The effect of grain size on reflection is maximum in the near-IR region

C. The effect of grain size on reflection is low in the visible region of the spectrum

D. Snow albedo falls at all wave length with the increase of grain size

73. Spatial variation in horizontal and vertical directions is caused due to_________________?
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A. Biological weathering of rocks

B. Chemical weathering of rocks

C. All of these

D. Physical weathering of rocks

74. The code based GPS receivers are generally used for_________________?
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A. Trans movement

B. Vehicle tracking

C. All of these

D. Land navigation

75. The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared______________?
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A. Visible (0.4

B. Near-IR (0.7

C. Short wave-IR (1.3

D. None of these

76. The various stages occuring in GPS system are described below ?
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A. Detection of the GPS signals

B. Processing the data in the built-in-computer

C. Generation of an output to the user

D. Decoding the GPS signal</strong>

77. The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target_________________?
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A. Reduces the contrast of the image and also its sharpness

B. Increases the contrast of the image but reduces the sharpness

C. Increases both the contrast and sharpness

D. Reduces the contrast but increases the sharpness

78. Pick up the correct statement from the following ?
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A. All of these

B. The first man-made satellite, Sputnik-l was launched on 4th October, 1957

C. Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960

D. The United States Explorer 6 transmitted the first picture of the earth in August 1959

79. Which one of the following statements is correct ?
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A. During the day, earth reflects solar radiation

B. During the day, earth reflects both solar radiations the emission from its surface

C. During the night, earth emits radiation from its surface

D. All of these

80. Which on speed C. of the electromagnetic wave is correct ?
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A. C = v

B. C = /v

C. C = 1/

D. C = v

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