Practice Elements Of Remote Sensing Multiple Choice Questions with Answers Quiz-6

Q.1.

The refractive index of the ocean water:

increases with salinity
increases with temperature
decreases with salinity
decreases with temperature

Q.2.

The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared:

visible (0.4 - 0.7 μm) region
near-IR (0.7 - 1.3 μm) region
short wave-IR (1.3 - 2.7 μm) region
None of these

Q.3.

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 Organisation (ISRO) is responsible for the space technology and its application to various activities.
All of these

Q.4.

Which one of the following statements is correct?

During the day, earth reflects solar radiation
During the day earth reflects both solar radiation the emission from its surface
During the night, earth emits radiation from its surface
All of these

Q.5.

Crop Acreage and Production Estimation (CAPE) was funded and taken up inby:

USA
European Union
Russia
India

Q.6.

Critical angle of electromagnetic radiation takes place if

angle of incidence is equal to angle of refraction
angle of incidence is greater than the angle of refraction
angle of incidence is equal to 90°
angle of refraction is equal to 90°

Q.7.

Pick up the correct statement from the following:

The surface defined by the locus of points having same phase, is called a wave front.
The wave whose surface of constant phase are parallel planes, is known as a plane wave.
The relative phase difference between the waves is important and not the absolute phase of a point on the wave
All of these

Q.8.

Due to pertubation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its

six ground stations
five ground stations
four ground stations
three ground stations

Q.9.

In case of reflection and refraction of electromagnetic radiation,

angle of incidence = angle of refraction
angle of incidence = angle of reflection
angle of refraction = sum of the angles of incidence and refraction
All the above

Q.10.

A perfectly black body :

is a diffuse emitter
absorbs all the radiations of every wave lengths
emits power of every wave length
All the above

Q.11.

The infrared portion of EMR lies between

0.4 - 0.7 μm
0.5 mm to lm
0.7 - 1.3 μm
0.7 to 14 μm

Q.12.

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.
The force between the magnetic poles is inversely proportional to the permeability of the medium.
All of these

Q.13.

The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called :

spectral variation
spatial variation
temporal variation
None of these .

Q.14.

Which one the following is a correct statement?

The vertical section of the soil extending into the parent material, is called profile
The layers of the soil parallel to the earth surface, are called horizons.
The transitional layer between two adjoining horizons, is called boundary.
All of these

Q.15.

Rayleigh's criteria for a rough surface is: (where letters carry their usual meanings).

h > λ/Δ cos θ
h = λ/8 cos θ
h > λ/8 cos θ
h < λ/8 cos θ

Q.16.

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.17.

Electromagnetic spectrum contains :

gamma rays (wave length < 10^-10 m)
ultraviolet rays (wave length < 10^-6 m)
infrared rays (wave length < 10^-4 m)
radio rays (wave length > 1 m)
All of these

Q.18.

The object of photo-intepretation is:

All of these
identification
recognition of objects
judging the significance of objects

Q.19.

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.
The square of the amplitude is proportional to the energy transported by the wave.
All of these

Q.20.

The changes in the reflectivity/emis-sivity with time, is called :

spectral variation
spatial variation
temporal variation
None of these

Q.21.

The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is :

8
12
16
24

Q.22.

Coherence of two electromagnetic waves takes place if their phase difference is :

constant in time
constant in space
constant in time and space
None of these

Q.23.

For interpolation of satellite data used for monitoring dynamic changes that occure on the earth surface, the most suitable orbit for the satellite is :

circular orbit
sun-synchronous orbit
near polar orbit
None of these

Q.24.

Pick up the correct statement from the following :

When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed.
When the electric vector is in the plane of incidence, vertical polarisation is formed.
When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed.
The plane containing the incident ray and normal to the reflecting surface at the point of incidence is called the plane of incidence.
All of these

Q.25.

Who coined the term, 'Remote sensing'.

Evelyn L. Pruitt, a geographer
Gaspard Felix Tournachon, a French scientist
Wilbur Wright, an Italian sciencist
None of these

Q.26.

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.
Area coverage of the imaging system increases with the increase of the platform altitude.
All of these

Q.27.

Electromagnetic radiation :

produces a time varying magnetic field and vice versa
once generated, remains self-propagat-ing.
is capable to travel across space
consists of magnetic and electric fields
All of these

Q.28.

Pick up the correct statement from the following :

The distance between two successive crests or troughs of a wave, is called, the wave length
The wave length is measured in metres and a fraction of a metre
The wave length is generally denoted by λ
The length of the crest from the mid point, is called amplitude
All of these

Q.29.

The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:

reflectance
reflectance factor
albedo
none of these

Q.30.

Pick up the correct statement from the following :

The first man-made satellite, Sputnikl' 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
U.S.A.'s highly secret mission CORONA started the collection of intelligence photograpy in 1960
All of these.

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