The coherence length over which there is a strong relationship between amplitudes is_________________?

Directly proportional to the bandwidth

Inversely proportional to the bandwidth

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

Pick up the correct definition from the following with response to GIS_______________?

Common boundary between two areas of a locality is known as adjacency

The area features which are wholly contained within another area feature, is known so containment

The geometric property which describes the linkage between line features is defined as connectivity

In case of reflection and refraction of electromagnetic radiation ?

Angle of refraction = sum of the angles of incidence and refraction

Angle of incidence = angle of refraction

Angle of incidence = angle of reflection

Angle of refraction = sum of the angles of incidence and refraction

Geodimeter is based on_________________?

Propagation of infrared radiation

Propagation of modulated light waves

Propagation of infrared radiation

The visible light as carrier with frequency of the order of 5 × 1014 Hz

Electromagnetic spectrum contains________________?

Gamma rays (wave length < 10-10 m)

Ultraviolet rays (wave length < 10-6 m)

Infrared rays (wave length < 10 -4 m)

Electromagnetic radiation_______________?

Produces a time varying magnetic field and vice versa

Once generated, remains self-propagating

Is capable to travel across space

Earth observations from a satellite platform provide____________?

Constant solar zenith angles and similar illumination conditions

Repetitive observations of the same area with intervals of a few minutes to a few weeks

Due to scan geometry of a satellite sensor____________________?

The off-nadir resolution is degraded

The ground distance swept by the senor, IFOV is proportional to sec2 of scan measured from the nadir

The details towards the edge of the scan get compressed

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°

According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?

The angle of incidence is equal to the angle of refraction

The angle of refraction r) is given by sin i

A reduction of nitrogen nutrient in plants_______________?

Increase the visible reflectivity

A passive sensor uses ________________?

Flash light as a source of energ

Which one of the following statement is correct ?

Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation

The rate of transfer of radiant energy is called flux and is expressed in watts.

The radiant energy which falls upon a surface, is termed as irradiance.

The radiant energy which falls away from the surface is termed as radient exitance and is measured in Wm-2

Pick up the correct statement from to following:

For complete temporal coherence, the waves must be mono chromatic.

For spatial coherence, the phase difference between two points in space is constant with time.

Superposition of the coherent waves produce interference

With 0 phase difference, the constructive interference takes place.

Electromagnetic spectrum contains :

gamma rays (wave length < 10-10 m)

ultraviolet rays (wave length < 10-6 m)

infrared rays (wave length < 10-4 m)

A reduction of nitrogen nutrient in plants:

ncrease the visible reflectivity

A passive sensor uses:

lash light as a source of energy

228 + Mcqs in Elements Of Remote Sensing in Civil Engineering Page 2 McqOptions

51.	The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________?
A.	Sensors
B.	Passive sensors
C.	Active sensors
D.	None of these
Answer» D. None of these

Discussion

52.	The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is_______________?
A.	8
B.	12
C.	16
D.	24
Answer» E.

Discussion

53.	The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________?
A.	10-10 to 106 m
B.	10-8 to 106 m
C.	10-10 to 1010 m
D.	10-8 to 108 m
Answer» B. 10-8 to 106 m

Discussion

54.	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» C. The square of the bandwidth

Discussion

55.	The code based GPS receivers are generally used for_________________?
A.	Vehicle tracking
B.	Land navigation
C.	Trans movement
D.	All of these
Answer» E.

Discussion

56.	The changes in the reflectivity/emissivity with time, is called ?
A.	Spectral variation
B.	Spatial variation
C.	Temporal variation
D.	None of these
Answer» D. None of these

Discussion

57.	The basic requirement of any sensor system is___________________?
A.	Radiometric resolution
B.	Spatial resolution
C.	Spectral resolution
D.	All of these
Answer» E.

Discussion

58.	The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called_________________?
A.	Spectral variation
B.	Spatial variation
C.	Temporal variation
D.	None of these
Answer» C. Temporal variation

Discussion

59.	The altitudinal distance of a geostationary satellite from the earth is about_________________?
A.	26,000 km
B.	30,000 km
C.	36,000 km
D.	44,000 km
Answer» D. 44,000 km

Discussion

60.	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
Answer» E.

Discussion

61.	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» D. Wind waves

Discussion

62.	Pick up the important characteristic of a target which facilitates its identification from the following ?
A.	Spectral variation
B.	Spatial variation
C.	Temporal variation
D.	All of these
Answer» E.

Discussion

63.	Pick up the correct statement from the following_________________?
A.	When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed
B.	When the electric vector is in the plane of incidence, vertical polarisation is formed
C.	When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed
D.	All of these
Answer» E.

Discussion

64.	Pick up the correct definition from the following with response to GIS_______________?
A.	Common boundary between two areas of a locality is known as adjacency
B.	The area features which are wholly contained within another area feature, is known so containment
C.	The geometric property which describes the linkage between line features is defined as connectivity
D.	All of these
Answer» E.

Discussion

65.	Orbital radius of GPS satellites is approximately ___________________?
A.	15,200 km
B.	26,600 km
C.	18,400 km
D.	36,000 km
Answer» C. 18,400 km

Discussion

66.	Leaf reflectance depends primarily on______________?
A.	The pigments
B.	Internal cell structur
C.	Equivalent water content
D.	All of these
Answer» E.

Discussion

67.	In GPS, receivers used are___________________?
A.	Electronic clocks
B.	Atomic clocks
C.	Quartz clocks
D.	Mechanical clocks
Answer» D. Mechanical clocks

Discussion

68.	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» C. Angle of refraction = sum of the angles of incidence and refraction

Discussion

69.	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___________________?
A.	h = dp/(B/H)
B.	h = (B/H) dp
C.	h = dp/(H/B)
D.	h = (H/B) dp
Answer» B. h = (B/H) dp

Discussion

70.	If electric permittivity and magnetic permeability of the medium are respectively and , then the velocity (Cm) of the electromagnetic wave in the medium is given by___________________?
A.	Cm = 1/εμ
B.	Cm = 1/√8 μ
C.	Cm = 5/√εμ
D.	None of these
Answer» C. Cm = 5/√εμ

Discussion

71.	Geodimeter is based on_________________?
A.	Propagation of modulated light waves
B.	Propagation of infrared radiation
C.	The visible light as carrier with frequency of the order of 5 × 1014 Hz
D.	High frequency radio waves
Answer» B. Propagation of infrared radiation

Discussion

72.	For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is______________?
A.	Circular orbit
B.	Sun-synchronous orbit
C.	Near polar orbit
D.	None of these
Answer» C. Near polar orbit

Discussion

73.	For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is_____________?
A.	130 km
B.	230 km
C.	250 km
D.	500 km
Answer» C. 250 km

Discussion

74.	Electromagnetic spectrum contains________________?
A.	Gamma rays (wave length < 10-10 m)
B.	Ultraviolet rays (wave length < 10-6 m)
C.	Infrared rays (wave length < 10 -4 m)
D.	All of these
Answer» E.

Discussion

75.	Electromagnetic radiation_______________?
A.	Produces a time varying magnetic field and vice versa
B.	Once generated, remains self-propagating
C.	Is capable to travel across space
D.	All of these
Answer» E.

Discussion

76.	Earth observations from a satellite platform provide____________?
A.	Synoptic view of a large area
B.	Constant solar zenith angles and similar illumination conditions
C.	Repetitive observations of the same area with intervals of a few minutes to a few weeks
D.	All of these
Answer» E.

Discussion

77.	Due to scan geometry of a satellite sensor____________________?
A.	The off-nadir resolution is degraded
B.	The ground distance swept by the senor, IFOV is proportional to sec2 of scan measured from the nadir
C.	The details towards the edge of the scan get compressed
D.	All of these
Answer» E.

Discussion

78.	Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its_______________________?
A.	Six ground stations
B.	Five ground stations
C.	Four ground stations
D.	Three ground stations
Answer» C. Four ground stations

Discussion

79.	DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within___________________?
A.	25 km
B.	50 km
C.	75 km
D.	100 km
Answer» E.

Discussion

80.	Critical angle of electromagnetic radiation takes place if__________________?
A.	Angle of incidence is equal to angle of refraction
B.	Angle of incidence is greater than the angle of refraction
C.	Angle of incidence is equal to 90°
D.	Angle of refraction is equal to 90°
Answer» E.

Discussion

81.	Consider the following statements regarding the satellite imaging_________________?_x005F_x000D_1. The satellite orbit is fixed in the inertial space_x005F_x000D_2. During successive across-track imaging, the earth rotates beneath the sensor_x005F_x000D_3. The satellite images a skewed area_x005F_x000D_Which one of the following statements is/are correct?
A.	1, 2, 3
B.	1, 3
C.	2, 3
D.	1, 2
Answer» B. 1, 3

Discussion

82.	Coherence of two electromagnetic waves takes place if their phase difference is_________________?
A.	Constant in time
B.	Constant in space
C.	Constant in time and space
D.	None of these
Answer» D. None of these

Discussion

83.	“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» B. Fresnel refraction

Discussion

84.	According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?
A.	The angle of incidence is equal to the angle of refraction
B.	The angle of refraction r) is given by sin i
C.	Both A. and B.
D.	Neither A. nor B.
Answer» C. Both A. and B.

Discussion

85.	A reduction of nitrogen nutrient in plants_______________?
A.	Affects leaf colour
B.	Reduces pigment concentration
C.	Increase the visible reflectivity
D.	All of these
Answer» E.

Discussion

86.	A passive sensor uses ________________?
A.	Sun as the source of energy
B.	Flash light as a source of energ
C.	Its own source of energy
D.	None of these
Answer» B. Flash light as a source of energ

Discussion

87.	Which one of the following statement is correct ?
A.	Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation
B.	The rate of transfer of radiant energy is called flux and is expressed in watts.
C.	The radiant energy which falls upon a surface, is termed as irradiance.
D.	The radiant energy which falls away from the surface is termed as radient exitance and is measured in Wm-2
E.	All of these
Answer» F.

Discussion

88.	'A time varying magnetic field produces an electric field'. This phenomenon is known as
A.	Newton's law
B.	Kirchofflaw
C.	Ampere Maxwell law
D.	Faraday's law
Answer» E.

Discussion

89.	Polarising angle (i) and refractive index (μ) of the reflecting surface are related by:
A.	sin i = μ
B.	cos i = μ
C.	tan i = μ
D.	[D].
Answer» D. [D].

Discussion

90.	Which one of the following relationship between the wave length (λ), and frequency and the speed (C) of the electromagnetic wave is correct ?
A.	C = v + λ
B.	[B].
C.	C = vλ
D.	[D].
Answer» D. [D].

Discussion

91.	Pick up the correct statement from to following:
A.	For complete temporal coherence, the waves must be mono chromatic.
B.	For spatial coherence, the phase difference between two points in space is constant with time.
C.	Superposition of the coherent waves produce interference
D.	With 0 phase difference, the constructive interference takes place.
E.	All of these
Answer» F.

Discussion

92.	Electromagnetic spectrum contains :
A.	gamma rays (wave length < 10-10 m)
B.	ultraviolet rays (wave length < 10-6 m)
C.	infrared rays (wave length < 10-4 m)
D.	radio rays (wave length > 1 m)
E.	All of these
Answer» F.

Discussion

93.	If electric permittivity and magnetic permeability of the medium are respectively ε and μ, then the velocity (Cm) of the electromagnetic wave in the medium is given by :
A.	[A].
B.	[B].
C.	[C].
D.	None of these
Answer» C. [C].

Discussion

94.	Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena:
A.	loud evolution
B.	egetative cover
C.	now cover
D.	ll of these
Answer» E.

Discussion

95.	A reduction of nitrogen nutrient in plants:
A.	ffects leaf color
B.	educes pigment concentration
C.	ncrease the visible reflectivity
D.	ll of these
Answer» E.

Discussion

96.	DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within
A.	5 km
B.	0 km
C.	5 km
D.	00 km
Answer» E.

Discussion

97.	A passive sensor uses:
A.	un as the source of energy
B.	lash light as a source of energy
C.	ts own source of energy
D.	one of these
Answer» B. lash light as a source of energy

Discussion

98.	The basic requirement of any sensor system is:
A.	adiometric resolution
B.	patial resolution
C.	pectral resolution
D.	ll of these
Answer» E.

Discussion

99.	Consider the following statements regarding the satellite imaging:1. The satellite orbit is fixed in the inertial space2. During successive across-track imaging, the earth rotates beneath the sensor3. The satellite images a skewed areaWhich one of the following statements is/are correct?
A.	, 2, 3
B.	, 3
C.	, 3
D.	, 2
Answer» B. , 3

Discussion

100.	The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:
A.	ensors
B.	assive sensors
C.	ctive sensors
D.	one of these
Answer» D. one of these

Discussion

Explore topic-wise MCQs in Civil Engineering.

The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________?

The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is_______________?

The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________?

The coherence length over which there is a strong relationship between amplitudes is_________________?

The code based GPS receivers are generally used for_________________?

The changes in the reflectivity/emissivity with time, is called ?

The basic requirement of any sensor system is___________________?

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

The altitudinal distance of a geostationary satellite from the earth is about_________________?

Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena________________?

Remote sensing techniques make use of the properties of ______________ emitted, reflected or diffracted by the sensed objects?

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

Pick up the correct statement from the following_________________?

Pick up the correct definition from the following with response to GIS_______________?

Orbital radius of GPS satellites is approximately ___________________?

Leaf reflectance depends primarily on______________?

In GPS, receivers used are___________________?

In case of reflection and refraction of electromagnetic radiation ?

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___________________?

If electric permittivity and magnetic permeability of the medium are respectively and , then the velocity (Cm) of the electromagnetic wave in the medium is given by___________________?

Geodimeter is based on_________________?

For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is______________?

For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is_____________?

Electromagnetic spectrum contains________________?

Electromagnetic radiation_______________?

Earth observations from a satellite platform provide____________?

Due to scan geometry of a satellite sensor____________________?

Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its_______________________?

DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within___________________?

Critical angle of electromagnetic radiation takes place if__________________?

Coherence of two electromagnetic waves takes place if their phase difference is_________________?

“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___________________?

According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?

A reduction of nitrogen nutrient in plants_______________?

A passive sensor uses ________________?

Which one of the following statement is correct ?

'A time varying magnetic field produces an electric field'. This phenomenon is known as

Polarising angle (i) and refractive index (μ) of the reflecting surface are related by:

Which one of the following relationship between the wave length (λ), and frequency and the speed (C) of the electromagnetic wave is correct ?

Pick up the correct statement from to following:

Electromagnetic spectrum contains :

If electric permittivity and magnetic permeability of the medium are respectively ε and μ, then the velocity (Cm) of the electromagnetic wave in the medium is given by :

Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena:

A reduction of nitrogen nutrient in plants:

DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within

A passive sensor uses:

The basic requirement of any sensor system is:

Consider the following statements regarding the satellite imaging:1. The satellite orbit is fixed in the inertial space2. During successive across-track imaging, the earth rotates beneath the sensor3. The satellite images a skewed areaWhich one of the following statements is/are correct?

The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called: