Remote sensing techniques are being usefully employed for the purpose of:

improving natural resource management

are the first link in all the aquatic and marine food chains

convert solar energy, dissolved carbon and nitrogen into organic biomass

The optical property of a water body depends on:

absorption by the disolved material

absorption by the suspended particulate matter

scattering by the surpended particulate matter

Geodimeter is based on :

propogation of infrared radiation

propogation of modulated light waves

propogation of infrared radiation

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

A passive sensor uses :

flash light as a source of energy

For accurate position fix, the three satellites:

must be such that one satellite is overhead of the receiver and other two widely separated

must be in vertical line above the receiver

must be widely separated and well distributed

must be such that one satellite is overhead of the receiver and other two widely separated

Which one of the following statements is correct to remote sensing?

The basic property used to identify objects, is called signature.

The ratio of the reflected flux to incident flux is called reflectance which varies fron 0 to 1

The surface from which emergent radiance is constant in all directions is called Lambertian surface.

Pick up the incorrect statement regarding the optical infrared region of the electromagnetic spectrum from the following :

near infrared region, 1.5 μ m - 3.0 μm

visible region, 0.4 μm - 0.7 μm

short wave infrared region, 0.7 μ m - 1.5 μm

near infrared region, 1.5 μ m - 3.0 μm

microwave infrared region, 3.0 μ m - 8.0 μm

Electromagnetic radiation :

produces a time varying magnetic field and vice versa

once generated, remains self-propagat-ing.

is capable to travel across space

A perfectly black body :

absorbs all the radiations of every wave lengths

emits power of every wave length

A reduction of nitrogen nutrient in plants :

increase the visible reflectivity

Which one of the following residual biases involves the GPS accuracy ?

Satellite dependent baises due to uncertainty in the orbital parameters of the satellite.

Receiver-depandent biases due to clock stability with line

Signal propagation baises due to the sphere and troposphere propogation.

Earth observations from a satellite platform provides :

constant solar zenith angles and similar illumination conditions.

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

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

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

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.

Which one of the following parameters is accurate for DGPS.

Positional accuracies ~ 2 - 5m if rover is less than 2-5 fm from the reference station

Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station

Positional accuracies ~ 2 - 5m if rover is less than 2-5 fm from the reference station

Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station

Positional accuracies ~ 5 - 10 m if rover is less than 25 km

Who coined the term, 'Remote sensing'.

Gaspard Felix Tournachon, a French scientist

Wilbur Wright, an Italian sciencist

Which one of the following statements is correct regarding the GPS satellites ?

The nominal altitude is about 20, 200 km

The inclination of axis satellite is 55°

The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)

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.

202 + Mcqs in Elements of Remote Sensing in Surveying Page 2 McqOptions

51.	Remote sensing techniques are being usefully employed for the purpose of:
A.	improving natural resource management
B.	land use
C.	protection of the environment
D.	All of these
Answer» E.

Discussion

52.	The changes in the reflectivity/emis-sivity with time, is called :
A.	spectral variation
B.	spatial variation
C.	temporal variation
D.	None of these
Answer» D. None of these

Discussion

53.	In GPS, receivers are used are ;
A.	electronic clocks
B.	atomic clocks
C.	quartz clocks
D.	mechanical clocks
Answer» D. mechanical clocks

Discussion

54.	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

55.	Phytoplanktons :
A.	are microscopic plants
B.	are the first link in all the aquatic and marine food chains
C.	convert solar energy, dissolved carbon and nitrogen into organic biomass
D.	All of these
Answer» E.

Discussion

56.	The optical property of a water body depends on:
A.	absorption by the disolved material
B.	absorption by the suspended particulate matter
C.	scattering by the surpended particulate matter
D.	All of these
Answer» E.

Discussion

57.	Which one of the following can travel through empty space :
A.	sound waves
B.	water waves
C.	electromagnetic waves
D.	spring waves
Answer» D. spring waves

Discussion

58.	Which one of the following frequencies is a GPS ?
A.	L1 with frequency 1520 MHz
B.	L1 with frequency 1575.42 MHz
C.	L1 with frequency 1227.6 MHz
D.	L1 with frequency 1280.43 Hz
Answer» C. L1 with frequency 1227.6 MHz

Discussion

59.	Which one of the following factors does not affect the scale of the air photographs :
A.	focal length
B.	flying height
C.	ground elevation
D.	None of these
Answer» E.

Discussion

60.	Geodimeter is based on :
A.	propogation of modulated light waves
B.	propogation of infrared radiation
C.	the visible light as carrier with frequency of the order of 5 x 1014Hz
D.	high frequency radio waves.
Answer» B. propogation of infrared radiation

Discussion

61.	A passive sensor uses :
A.	sun as the source of energy
B.	flash light as a source of energy
C.	its own source of energy
D.	None of these
Answer» B. flash light as a source of energy

Discussion

62.	For accurate position fix, the three satellites:
A.	must be along a common arc
B.	must be in vertical line above the receiver
C.	must be widely separated and well distributed
D.	must be such that one satellite is overhead of the receiver and other two widely separated
Answer» D. must be such that one satellite is overhead of the receiver and other two widely separated

Discussion

63.	Which one of the following statements is correct to remote sensing?
A.	The basic property used to identify objects, is called signature.
B.	The ratio of the reflected flux to incident flux is called reflectance which varies fron 0 to 1
C.	The surface from which emergent radiance is constant in all directions is called Lambertian surface.
D.	All of these.
Answer» E.

Discussion

64.	"All bodies at temperatures above absolute zero degree emit electromagnetic radiation at different wave length", is known as:
A.	Plank's law
B.	Planktan's law
C.	Lambert's cosine law
D.	None of these
Answer» B. Planktan's law

Discussion

65.	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

66.	Pick up the incorrect statement regarding the optical infrared region of the electromagnetic spectrum from the following :
A.	visible region, 0.4 μm - 0.7 μm
B.	short wave infrared region, 0.7 μ m - 1.5 μm
C.	near infrared region, 1.5 μ m - 3.0 μm
D.	microwave infrared region, 3.0 μ m - 8.0 μm
Answer» C. near infrared region, 1.5 μ m - 3.0 μm

Discussion

67.	Which one of the following errors is produced by platform characteristics of the sensor ?
A.	altitude variation
B.	altitude
C.	orbit drift
D.	All of these
Answer» E.

Discussion

68.	"An Electromagnetic wave falls on to a boundary between two loss 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

69.	'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

70.	According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on an other medium (refractive index m2);
A.	A
B.	B
C.	C
D.	D
Answer» C. C

Discussion

71.	Electromagnetic radiation :
A.	produces a time varying magnetic field and vice versa
B.	once generated, remains self-propagat-ing.
C.	is capable to travel across space
D.	All of these
Answer» E.

Discussion

72.	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

73.	Due to pertubation 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

74.	Remote sensing techniques makes use of the properties of-----emitted, reflected or diffracted by the sensed objects:
A.	electric waves
B.	soundwaves
C.	electromagnetic waves
D.	wind waves
Answer» D. wind waves

Discussion

75.	A perfectly black body :
A.	is a diffuse emitter
B.	absorbs all the radiations of every wave lengths
C.	emits power of every wave length
D.	All the above
Answer» E.

Discussion

76.	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

77.	The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:
A.	10^-10 to 10^6 m
B.	10^-8 to 10^6 m
C.	10^-10 to 10^10 m
D.	10^-8 to 10^8 m
Answer» B. 10^-8 to 10^6 m

Discussion

78.	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

79.	Which one of the following residual biases involves the GPS accuracy ?
A.	Satellite dependent baises due to uncertainty in the orbital parameters of the satellite.
B.	Receiver-depandent biases due to clock stability with line
C.	Signal propagation baises due to the sphere and troposphere propogation.
D.	All the above
Answer» E.

Discussion

80.	The main functional blocks of a mul-tispectral scanner (MSS) are given below :1. Video processor2. Dispersive system3. Detector4. Signal conditioner5. Collecting opticsWhich one of the following sequences is correct?
A.	1, 4, 5, 3, 2
B.	5, 3, 2, 4, 1
C.	5, 2, 3, 1, 4
D.	1, 3, 2, 4, 5
Answer» D. 1, 3, 2, 4, 5

Discussion

81.	Snow albedo is affected by :
A.	wave length
B.	grain size
C.	solar zenith angle
D.	All of these
Answer» E.

Discussion

82.	The information system is the chain of the following operations, 1. Collection of data2. Planning the observations3. Analysis of data4. Decision making process Which one of the chains is correct ?
A.	4, 1, 2, 3
B.	2, 1, 3, 4
C.	3, 2, 1, 4
D.	1, 3, 4, 2
Answer» C. 3, 2, 1, 4

Discussion

83.	Earth observations from a satellite platform provides :
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

84.	Which one of the following attributes is not associated with digital maps
A.	colour
B.	symbology
C.	legends
D.	south arrow
Answer» E.

Discussion

85.	Which one of the following statements regarding remote sensing is correct.
A.	The interaction of the electromagnetic radiation with the target
B.	The emission of electromagnetic radiation from the target
C.	both (a) and (b)
D.	Neither (a) nor (b)
Answer» D. Neither (a) nor (b)

Discussion

86.	The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:
A.	ozone hole
B.	atmospheric window
C.	ozone window
D.	black hole
Answer» C. ozone window

Discussion

87.	The basic requirement of any sensor system, is :
A.	radiometric resolution
B.	spatial resolution
C.	spectral resolution
D.	All of these
Answer» E.

Discussion

88.	Which one of the following helps to identify the objects on the earth surface ?
A.	atmospheric window
B.	signature
C.	radiometric error
D.	None of these
Answer» C. radiometric error

Discussion

89.	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

90.	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

91.	Which one the following is a correct statement?
A.	The vertical section of the soil extending into the parent material, is called profile
B.	The layers of the soil parallel to the earth surface, are called horizons.
C.	The transitional layer between two adjoining horizons, is called boundary.
D.	All of these
Answer» E.

Discussion

92.	Rayleigh's criteria for a rough surface is: (where letters carry their usual meanings).
A.	h > λ/Δ cos θ
B.	h = λ/8 cos θ
C.	h > λ/8 cos θ
D.	h < λ/8 cos θ
Answer» D. h < λ/8 cos θ

Discussion

93.	Which one of the following parameters is accurate for DGPS.
A.	Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station
B.	Positional accuracies ~ 2 - 5m if rover is less than 2-5 fm from the reference station
C.	Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station
D.	Positional accuracies ~ 5 - 10 m if rover is less than 25 km
Answer» B. Positional accuracies ~ 2 - 5m if rover is less than 2-5 fm from the reference station

Discussion

94.	Who coined the term, 'Remote sensing'.
A.	Evelyn L. Pruitt, a geographer
B.	Gaspard Felix Tournachon, a French scientist
C.	Wilbur Wright, an Italian sciencist
D.	None of these
Answer» B. Gaspard Felix Tournachon, a French scientist

Discussion

95.	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

96.	Which one of the following statements is correct regarding the GPS satellites ?
A.	The nominal altitude is about 20, 200 km
B.	The inclination of axis satellite is 55°
C.	The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)
D.	All of these
Answer» E.

Discussion

97.	Snow consists of
A.	snow crystals
B.	rimed snow crystals
C.	snow flakes
D.	All of these
Answer» E.

Discussion

98.	Which one of the following statement is incorrect regarding the electromagnetic radiation?
A.	These are produced by the motion of electric charge
B.	The oscillation of charged particles sets up changing electric fields.
C.	The changing electric fields induce the changing magnetic fields in the surrounding medium.
D.	None 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 area 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

100.	Formation of snow occurs if the cloud temperature is
A.	just above the freezing point
B.	at the freezing point
C.	below the freezing point
D.	None of these
Answer» D. None of these

Discussion

Explore topic-wise MCQs in Surveying.

Remote sensing techniques are being usefully employed for the purpose of:

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

In GPS, receivers are used are ;

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

Phytoplanktons :

The optical property of a water body depends on:

Which one of the following can travel through empty space :

Which one of the following frequencies is a GPS ?

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

Geodimeter is based on :

A passive sensor uses :

For accurate position fix, the three satellites:

Which one of the following statements is correct to remote sensing?

"All bodies at temperatures above absolute zero degree emit electromagnetic radiation at different wave length", is known as:

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

Pick up the incorrect statement regarding the optical infrared region of the electromagnetic spectrum from the following :

Which one of the following errors is produced by platform characteristics of the sensor ?

"An Electromagnetic wave falls on to a boundary between two loss 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 time varying magnetic field produces an electric field'. This phenomenon is known as

According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on an other medium (refractive index m2);

Electromagnetic radiation :

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

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

Remote sensing techniques makes use of the properties of-----emitted, reflected or diffracted by the sensed objects:

A perfectly black body :

A reduction of nitrogen nutrient in plants :

The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:

Orbital radius of GPS satellites is approximately:

Which one of the following residual biases involves the GPS accuracy ?

The main functional blocks of a mul-tispectral scanner (MSS) are given below :1. Video processor2. Dispersive system3. Detector4. Signal conditioner5. Collecting opticsWhich one of the following sequences is correct?

Snow albedo is affected by :

The information system is the chain of the following operations, 1. Collection of data2. Planning the observations3. Analysis of data4. Decision making process Which one of the chains is correct ?

Earth observations from a satellite platform provides :

Which one of the following attributes is not associated with digital maps

Which one of the following statements regarding remote sensing is correct.

The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:

The basic requirement of any sensor system, is :

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

In case of reflection and refraction of electromagnetic radiation,

The code based GPS receivers are generally used for:

Which one the following is a correct statement?

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

Which one of the following parameters is accurate for DGPS.

Who coined the term, 'Remote sensing'.

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

Which one of the following statements is correct regarding the GPS satellites ?

Snow consists of

Which one of the following statement is incorrect regarding the electromagnetic radiation?

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 area Which one of the following statements is/are correct ?

Formation of snow occurs if the cloud temperature is