Remote Sensing Quiz | Remote Sensing Objective Type Questions and Answers

Questions
21 The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,
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

Answer: Reduces the contrast of the image and also its sharpness
22 Spatial variation in horizontal and vertical directions is caused due to:
A Physical weathering of rocks
B Chemical weathering of rocks
C Biological weathering of rocks
D All of these

Answer: All of these
23 “An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media”. This phenomenon is known as:
A Fresnel reflection
B Fresnel refraction
C Snell’s law
D None of these

Answer: Fresnel reflection
24 A passive sensor uses:
A Sun as the source of energy
B Flash light as a source of energy
C Its own source of energy
D All of the above

Answer: Sun as the source of energy
25 Who coined the term, ‘Remote sensing’.
A Evelyn L. Pruitt, a geographer
B Gaspard Felix Tournachon, a French scientist
C Wilbur Wright, an Italian scientist
D All of these

Answer: Evelyn L. Pruitt, a geographer
26 Formation of snow occurs if the cloud temperature is
A Just above the freezing point
B At the freezing point
C Below the freezing point
D All of these

Answer: Below the freezing point
27 Pick up the correct statement from the following:
A Indian space effort started in 1962 with the establishment of a rocket
B Development of space (DOS) was established by the Government of India in 1972
C Indian Space Research Organisation (ISRO) is responsible for the space technology and its application to various activities
D All of these

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

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

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

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

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

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

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

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

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

Answer: All of these
37 Pick up the correct statement from the following:
A Phytoplankton contains photosynthetically active pigment
B An increase of phytoplankton increases the back scattering in the green region
C An increase of phytoplankton absorbs the bule region rapidly
D An increase of phytoplankton decreases the back scattering in the green region

Answer: An increase of phytoplankton decreases the back scattering in the green region
38 Which one of the following statements is correct?
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

Answer: All of these
39 A reduction of nitrogen nutrient in plants:
A Affects leaf colour
B Reduces pigment concentration
C Increase the visible reflectivity
D All of these

Answer: All of these
40 Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects:
A Electric waves
B Sound waves
C Electromagnetic waves
D Wind waves

Answer: Electromagnetic waves
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