Elements Of Remote Sensing Set 1

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This set of Elements of Remote Sensing Multiple Choice Questions & Answers (MCQs) focuses on Elements Of Remote Sensing Set 1

Q1 | 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
Q2 | Pick up the correct statement from the following:
  • in remote sensing technique, the observation place, is called a platform
  • platforms may be either stationary or mobile
  • spatial resolution of the imaging system becomes poorer with increase of platform height
  • all of these
Q3 | 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
Q4 | In the given figure the phase of
  • crest a
  • b
  • trough c is 3
  • all of these
Q5 | Coherence of two electromagnetic waves takes place if their phase difference is:
  • constant in time
  • constant in space
  • constant in time and space
  • none of these
Q6 | The coherence length over which there is a strong relationship between amplitudes is;
  • directly proportional to the bandwidth
  • inversely proportional to the bandwidth
  • the square of the bandwidth
  • none of these
Q7 | Pick up the correct statement from the following:
  • a graphical representation of spectral reflectance verses the various growth stages of a crop, depicts a phonologic pattern
  • the changes in the polarisation of the radiation reflected or emitted by an object, is known as polarisation variation
  • the degree of polarisation is a characteristic of the object which helps in the identification of the object
  • all of these
Q8 | Repetitive observations of the same area at equal interval of time are useful to monitor thedynamic phenomena:
  • cloud evolution
  • vegetative cover
  • snow cover
  • all of these
Q9 | Which one of the following parameters is considered to determine the reflectance of a vegetationcanopy?
  • solar zenith angle
  • azimuth angle
  • look angle
  • all of these
Q10 | A perfectly black body:
  • is a diffuse emitter
  • absorbs all the radiations of every wave lengths
  • emits power of every wave length
  • all the above
Q11 | sensor IFOV isproportional to:
  • sin2
  • cos2
  • sec2
  • tan2
Q12 | Which one the following is a correct statement?
  • the vertical section of the soil extending into the parent material, is called profile
  • the layers of the soil parallel to the earth surface are called horizons
  • the transitional layer between two adjoining horizons is called boundary
  • all of these
Q13 | In case of reflection and refraction of electromagnetic radiation,
  • angle of incidence = angle of refraction
  • angle of incidence = angle of reflection
  • angle of refraction = sum of the angles of incidence and refraction
  • all the above
Q14 | Which one of the following factors does not affect the scale of the air photographs?
  • focal length
  • flying height
  • ground elevation
  • none of these
Q15 | Which one of the following statements regarding remote sensing is correct?
  • the interaction of the electromagnetic radiation with the target
  • the emission of electromagnetic radiation from the target
  • both (a) and (b)
  • neither (a) nor (b)
Q16 | The optical property of a water body depends on:
  • absorption by the dissolved material
  • absorption by the suspended particulate matter
  • scattering by the suspended particulate matter
  • all of these
Q17 | Pick up the correct statement from the following:
  • frequency is the number of wave crests passing a fixed point in one second
  • frequency of a wave is measured in hertz (hz)
  • amplitude of a wave is the height of its crust from the mid-point
  • all of these
Q18 | The object of photo-interpretation is:
  • identification
  • recognition of objects
  • judging the significance of objects
  • all of these
Q19 | Pick up the correct statement from the following:
  • phytoplankton contains photosynthetically active pigment
  • an increase of phytoplankton increases the back scattering in the green region
  • an increase of phytoplankton absorbs the bule region rapidly
  • an increase of phytoplankton decreases the back scattering in the green region
Q20 | 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
Q21 | Which one of the following statements is correct?
  • during the day, earth reflects solar radiation
  • during the day, earth reflects both solar radiations the emission from its surface
  • during the night, earth emits radiation from its surface
  • all of these
Q22 | A reduction of nitrogen nutrient in plants:
  • affects leaf colour
  • reduces pigment concentration
  • increase the visible reflectivity
  • all of these
Q23 | Remote sensing techniques make use of the properties of ___________ emitted, reflected ordiffracted by the sensed objects:
  • electric waves
  • sound waves
  • electromagnetic waves
  • wind waves
Q24 | Which one of the following statement is incorrect regarding the electromagnetic radiation?
  • these are produced by the motion of electric charge
  • the oscillation of charged particles sets up changing electric fields
  • the changing electric fields induce the changing magnetic fields in the surrounding medium
  • none of these
Q25 | The altitudinal distance of a geostationary satellite from the earth is about:
  • 26,000 km
  • 30,000 km
  • 36,000 km
  • 44,000 km