Practice Elements Of Remote Sensing Multiple Choice Questions Quiz-2 - MCQGeeks.com

Q.1

'A time varying electric field produces a magnetic field.' This phenomenon is called:

Hertz's law
Ampere Maxwell's law
Faraday's law
Kirchoff’s law

Q.2

Pick up the important characteristic of a target which facilitates its identification from the following:

Spectral variation
Spatial variation
Temporal variation
All of these

Q.3

Pick up the correct statement from the following:

The first man-made satellite, Sputnik-l' was launched on 4th October, 1957
The United State's Explorer 6 transmitted the first picture of the earth in August 1959
Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960
All of these

Q.4

Pick up the correct statement from the following:

The minimum frequency of light for which no electrons are emitted, is called threshold frequency
Polarising angle of glass is 57.5°
At the polarising angle, the reflected and refracted rays are orthogonal
All the above

Q.5

Pick up the correct statement from the following:

For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the aerial photograph
The scale of the aerial photograph depends upon the scale of the topography
The feature at the principal point has no height displacement
All of the above

Q.6

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

Q.7

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

Q.8

Pick up the correct statement from the following:

Indian space effort started in 1962 with the establishment of a rocket
Development of space (DOS) was established by the Government of India in 1972
Indian Space Research Organization (ISRO) is responsible for the space technology and its application to various activities
All of these

Q.9

Pick up the correct statement from the following:

Permeability is a measure of conducting the magnetic lines of force in the material
Permeability is a measure of the extent to which magnetic lines of force can penetrate a medium
Permeability is expressed as the ratio of the magnetic flux density (B) to the field strength of the magnetizing field
All of these

Q.10

Which one of the following factors does not affect the scale of the air photographs?

Focal length
Flying height
Ground elevation
None of these

Q.11

The code based GPS receivers are generally used for:

Vehicle tracking
Land navigation
Trans movement
All of these

Q.12

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)

Q.13

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

Q.14

Which one of the following helps to identify the objects on the earth surface?

Atmospheric window
Signature
Radiometric error
None of these

Q.15

The object of photo-interpretation is:

Identification
Recognition of objects
Judging the significance of objects
All of these

Q.16

The various stages occuring in GPS system are described below:
1. Generation of an output to the user
2. Detection of the GPS signals
3. Processing the data in the built-in-computer
4. Decoding the GPS signal.
The correct sequence of the stages is:

1, 2, 3, 4
2, 3, 4, 1
2, 4, 3, 1
3, 1, 2, 4

Q.17

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 polarization of the radiation reflected or emitted by an object, is known as polarization variation
The degree of polarization is a characteristic of the object which helps in the identification of the object
All of these

Q.18

‘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?

Height displacement of A will be less than that of B
Height displacement of B will be less than that of A
Height displacement of A and B is equal
Height displacement of A and B will be towards each other

Q.19

Which one of the following statements is correct?

Snow albedo falls at all wave length with the increase of grain size
The effect of grain size on reflection is maximum in the near-IR region
The effect of grain size on reflection is low in the visible region of the spectrum
All of these

Q.20

Which one of the following statements is correct?

The function of an information system is to improve one’s ability to make decisions
The information system is the chain of operations
A map is a collection of stored, analyzed data, its stored information is suitability used in making decisions
All the above

Q.21

Orbital radius of GPS satellites is approximately:

15,200 km
26,600 km
18,400 km
36,000 km

Q.22

Spatial variation in horizontal and vertical directions is caused due to:

Physical weathering of rocks
Chemical weathering of rocks
Biological weathering of rocks
All of these

Q.23

The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:

Passive remote sensing
Active remote sensing
Neutral remote sensing
None of these

Q.24

The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:

0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm
2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm
4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm
All of these

Q.25

Which one of the following statements is correct?

π radians equal to 180°
The cone subtended by an area on the sphere at the centre, is called the solid angle
The solid angle is equal to the ratio of the area on the sphere and the square of the radius of the sphere
All of these

Q.26

Leaf reflectance depends primarily on:

The pigments
Internal cell structure
Equivalent water content
All of these

Q.27

In GPS, receivers are used are;

Electronic clocks
Atomic clocks
Quartz clocks
Mechanical clocks

Q.28

Geodimeter is based on:

Propagation of modulated light waves
Propagation of infrared radiation
The visible light as carrier with frequency of the order of 5 × 1014 Hz
High frequency radio waves

Q.29

If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height

h = dp/(B/H)
h = (B/H) dp
h = dp/(H/B)
h = (H/B) dp

Q.30

Which one of the following quantities forms the basis of radiometry?

Radiant energy (Q)
Radiant flux (φ)
Radiant intensity (I)
All of these

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