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Free download in PDF Elements of Remote Sensing Short 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.
41
Geodimeter is based on:
[A]
High frequency radio waves
[B]
The visible light as carrier with frequency of the order of 5 × 1014 Hz
[C]
Propagation of modulated light waves
[D]
Propagation of infrared radiation
Answer: High frequency radio waves
42
The code based GPS receivers are generally used for:
[A]
Trans movement
[B]
Vehicle tracking
[C]
Land navigation
[D]
All of these
43
Pick up the correct statement from the following:
[A]
The splitting of colours of white light by passing through a prism is caused due to dispersion
[B]
The refractive index of a medium varies according to the wavelength of the radiation
[C]
The variation of the refractive index with wave length, is called dispersion
[D]
All of these
44
While propagating through homogeneous, isotropic media,
[A]
Directions of both the fields are orthogonal
[B]
Both the fields are at right angles to the direction of propagation
[C]
Both A. and B.
[D]
Neither A. nor B.
45
The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called:
[A]
Spatial variation
[B]
Temporal variation
[C]
Spectral variation
[D]
None of these
Answer: Spatial variation
46
Which one of the following errors is produced by platform characteristics of the sensor?
[A]
Orbit drift
[B]
Altitude
[C]
Altitude variation
[D]
All of these
47
Leaf reflectance depends primarily on:
[A]
Equivalent water content
[B]
Internal cell structure
[C]
The pigments
[D]
All of these
48
Critical angle of electromagnetic radiation takes place if
[A]
Angle of refraction is equal to 90°
[B]
Angle of incidence is greater than the angle of refraction
[C]
Angle of incidence is equal to angle of refraction
[D]
Angle of incidence is equal to 90°
Answer: Angle of refraction is equal to 90°
49
Earth observations from a satellite platform provide:
[A]
Repetitive observations of the same area with intervals of a few minutes to a few weeks
[B]
Constant solar zenith angles and similar illumination conditions
[C]
Synoptic view of a large area
[D]
All of these
50
Which one of the following residual biases involves the GPS accuracy?
[A]
Signal propagation biases due to the sphere and troposphere propagation
[B]
Satellite dependent biases due to uncertainty in the orbital parameters of the satellite
[C]
Receiver -dependent biases due to clock stability with line
[D]
All the above
51
A and B are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?
[A]
Height displacement of A and B is equal
[B]
Height displacement of A and B will be towards each other
[C]
Height displacement of B will be less than that of A
[D]
Height displacement of A will be less than that of B
Answer: Height displacement of A will be less than that of B
52
Pick up the important characteristic of a target which facilitates its identification from the following:
[A]
Temporal variation
[B]
Spatial variation
[C]
Spectral variation
[D]
All of these
53
The value of energy quantum for radiation of any frequency is proportional to:
[A]
The reciprocal of the energy
[B]
The square of the frequency
[C]
The square root of the frequency
[D]
The frequency
54
Which one of the following statements is correct?
[A]
A map is a collection of stored, analysed data, its stored information is suitability used in making decisions
[B]
The information system is the chain of operations
[C]
The function of an information system is to improve one s ability to make decisions
[D]
All the above
55
Which one of the following geometric errors of satellite sensors is random?
[A]
Altitude variation
[B]
Earth rotation
[C]
Scan skew
[D]
Panoramic distortion
Answer: Altitude variation
56
Which one of the following frequency regions is a part of sun’s radiation?
[A]
Radio frequency region
[B]
Ultraviolet frequency region
[C]
Infrared frequency region
[D]
All of these
57
The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:
[A]
Atmospheric window
[B]
Ozone window
[C]
Ozone hole
[D]
Black hole
Answer: Atmospheric window
58
In GPS, receivers used are;
[A]
Quartz clocks
[B]
Atomic clocks
[C]
Electronic clocks
[D]
Mechanical clocks
59
Which one of the following attributes is not associated with digital maps
[A]
South arrow
[B]
Colour
[C]
Legends
[D]
Symbology
60
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:
[A]
Active sensors
[B]
Passive sensors
[C]
Sensors
[D]
None of these
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