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Free download in PDF Remote Sensing Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(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
(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
(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
(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
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
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.
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
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
36
The object of photo-interpretation is:
[A]
Identification
[B]
Recognition of objects
[C]
Judging the significance of objects
[D]
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
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
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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