Elements of Remote Sensing MCQs | Elements of Remote Sensing Multiple Choice Questions and Answers

Questions
1 Formation of snow occurs if the cloud temperature is
A Below the freezing point
B At the freezing point
C Just above the freezing point
D None of these

Answer: Below the freezing point
2 Coherence of two electromagnetic waves takes place if their phase difference is:
A Constant in time and space
B Constant in space
C Constant in time
D None of these

Answer: Constant in time and space

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3 Pick up the correct statement from the following:
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

Answer: All of the above
4 The coherence length over which there is a strong relationship between amplitudes is;
A Inversely proportional to the bandwidth
B The square of the bandwidth
C Directly proportional to the bandwidth
D None of these

Answer: Inversely proportional to the bandwidth
5 Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena:
A Cloud evolution
B Snow cover
C Vegetative cover
D All the above

Answer: All the above
6 Which one the following is a correct statement?
A The transitional layer between two adjoining horizons is called boundary
B The layers of the soil parallel to the earth surface are called horizons
C The vertical section of the soil extending into the parent material, is called profile
D All of these

Answer: All of these
7 Who coined the term, ‘Remote sensing’.
A Wilbur Wright, an Italian scientist
B Gaspard Felix Tournachon, a French scientist
C Evelyn L. Pruitt, a geographer
D None of these

Answer: Evelyn L. Pruitt, a geographer
8 The basic requirement of any sensor system is:
A Spectral resolution
B Radiometric resolution
C Spatial resolution
D All of these

Answer: All of these
9 A passive sensor uses:
A Its own source of energy
B Flash light as a source of energy
C Sun as the source of energy
D None of these

Answer: Sun as the source of energy
10 Spatial variation in horizontal and vertical directions is caused due to:
A Biological weathering of rocks
B Chemical weathering of rocks
C Physical weathering of rocks
D All of these

Answer: All of these
11 The most widely used antenna in GPS is
A Microstrip antenna
B Horn antenna
C Parabolic antenna
D Slotted antenna

Answer: Microstrip antenna
12 Orbital radius of GPS satellites is approximately:
A 26,600 km
B 18,400 km
C 15,200 km
D None of above

Answer: 26,600 km
13 Which one of the following parameters is considered to determine the reflectance of a vegetation canopy?
A Look angle
B Azimuth angle
C Solar zenith angle
D All of these

Answer: All of these
14 A perfectly black
A Emits power of every wave length
B Absorbs all the radiations of every wave lengths
C Is a diffuse emitter
D All the above

Answer: All the above
15 In case of reflection and refraction of electromagnetic radiation,
A Angle of incidence = angle of reflection
B Angle of refraction = sum of the angles of incidence and refraction
C Angle of incidence = angle of refraction
D All the above

Answer: Angle of incidence = angle of reflection
16 Which one of the following factors does not affect the scale of the air photographs?
A Ground elevation
B Focal length
C Flying height
D None of these

Answer: None of these
17 Which one of the following statements regarding remote sensing is correct?
A The emission of electromagnetic radiation from the target
B The interaction of the electromagnetic radiation with the target
C Both A. and B.
D Neither A. nor B.

Answer: Both A. and B.
18 The optical property of a water body depends on:
A Scattering by the suspended particulate matter
B Absorption by the suspended particulate matter
C Absorption by the dissolved material
D All of these

Answer: All of these
19 Pick up the correct statement from the following:
A Amplitude of a wave is the height of its crust from the mid-point
B Frequency of a wave is measured in Hertz (Hz)
C Frequency is the number of wave crests passing a fixed point in one second
D All of these

Answer: All of these
20 The object of photo-interpretation is:
A Judging the significance of objects
B Recognition of objects
C Identification
D All of these

Answer: All of these
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