Elements of Remote Sensing MCQs | Elements of Remote Sensing Short Questions and Answers

Questions
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

Answer: All of these

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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

Answer: 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.

Answer: Both A. and 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

Answer: All of these
47 Leaf reflectance depends primarily on:
A Equivalent water content
B Internal cell structure
C The pigments
D All of these

Answer: 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

Answer: 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

Answer: 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

Answer: 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

Answer: 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

Answer: 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

Answer: 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

Answer: Quartz clocks
59 Which one of the following attributes is not associated with digital maps
A South arrow
B Colour
C Legends
D Symbology

Answer: South arrow
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

Answer: Active sensors
ADRE 3.0 Complete Study Material