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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