The part radiation due to scattered/diffused radiation entering the field of view of a remotesensor other than that from the required target,

increases the contrast of the image but reduces the sharpness

reduces the contrast of the image and also its sharpness

increases the contrast of the image but reduces the sharpness

increases both the contrast and sharpness

reduces the contrast but increases the sharpness

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 b will be less than that of a

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

According to the Snell's law if an electromagnetic wave is incident in a medium (refractiveindex 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

Pan-chromatic images are used for

Plotting the contour map of an area

Getting precise information of location of important features

On a conformal projection

Equivalent map maintains true relationships of area, at a given scale, for every part as well as the whole

The shape of any small geographical area is preserved

Equivalent map maintains true relationships of area, at a given scale, for every part as well as the whole

The scale is preserved in the direction perpendicular to the line of zero distortion

The scale is preserved in the direction radially outward from a point of zero distortion.

Electromagnetic spectrum contains :

gamma rays (wave length < 10^-10 m)

ultraviolet rays (wave length < 10^-6 m)

infrared rays (wave length < 10^-4 m)

Which one of the following statements is not correct?

GIS technology is a tool box for processing maps and fundamental concepts for spatial measurement

GIS technology is the same as traditional mapping

GIS technology is a tool box for processing maps and fundamental concepts for spatial measurement

GIS technology contains analytic capabilities for overlaying maps

GIS technology is capable to study the environmental surrondings

While propagating through homogeneous, isotropic media,

directions of both the fields are orthogonal

both the fields are at right angles to the direction of propagation.

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°

Due to scan geometery of a satellite sensor:

the off-nadir resolution is degraded

the ground distance swept by the senor, IFOV is proportional to sec2θ, where θ is the angle of scan measured from the nadir

the details towards the edge of the scan get compressed

For perfect coherent radiation, which one of the following statement is correct?

Both the waves must have single frequencies

The directions of motion of both waves are parallel.

202 + Mcqs in Elements of Remote Sensing in Surveying Page 1 McqOptions

1.	The remote sensing techniques applied for the earth's surface features, is generally confined tothe following wave lengths:
A.	all of these
Answer» E.

Discussion

2.	The part radiation due to scattered/diffused radiation entering the field of view of a remotesensor other than that from the required target,
A.	reduces the contrast of the image and also its sharpness
B.	increases the contrast of the image but reduces the sharpness
C.	increases both the contrast and sharpness
D.	reduces the contrast but increases the sharpness
Answer» B. increases the contrast of the image but reduces the sharpness

Discussion

3.	If electric permittivity and magnetic permeability of the medium are respectively and , thenthe velocity (Cm) of the electromagnetic wave in the medium is given by:
A.	cm = 1/
B.	cm
C.	cm
D.	none of these
Answer» C. cm

Discussion

4.	The instruments which provide electromagnetic radiation of specified wave length or a band ofwave 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

5.	For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherencelength loch is:
A.	130 km
B.	230 km
C.	250 km
D.	500 km
Answer» C. 250 km

Discussion

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

Discussion

7.	Which onspeed (C) of the electromagnetic wave is correct?
A.	c = v
B.	c = /v
C.	c = v
D.	c = 1/
Answer» D. c = 1/

Discussion

8.	The spectral region of the electromagnetic radiation which passes through the atmospherewithout much attenuation is known as:
A.	ozone hole
B.	atmospheric window
C.	ozone window
D.	black hole
Answer» C. ozone window

Discussion

9.	Pick up the important characteristic of a target which facilitates its identification from thefollowing:
A.	spectral variation
B.	spatial variation
C.	temporal variation
D.	all of these
Answer» E.

Discussion

10.	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

11.	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 will be less than that of b
B.	height displacement of b will be less than that of a
C.	height displacement of a and b is equal
D.	height displacement of a and b will be towards each other
Answer» B. height displacement of b will be less than that of a

Discussion

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

Discussion

13.	If flying height of a spacecraft is H, the length of air base is B and the parallax difference betweentwo 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

14.	The arrangement of terrain features which provides attributes: the shape, size and texture ofobjects, is called:
A.	spectral variation
B.	spatial variation
C.	temporal variation
D.	none of these
Answer» C. temporal variation

Discussion

15.	According to the Snell's law if an electromagnetic wave is incident in a medium (refractiveindex 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

16.	For interpolation of satellite data used for monitoring dynamic changes that occurs on the earthsurface, 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

17.	The interaction of the electromagnetic radiation produced with a specific wave length toilluminate a target on the terrain for studying its scattered radiance, is called:
A.	passive remote sensing
B.	active remote sensing
C.	neutral remote sensing
D.	none of these
Answer» C. neutral remote sensing

Discussion

18.	The reflection of solar energy is characterised by the water content in the leaf, in the reflectiveoptical infrared:
A.	visible (0.4 -
B.	near-ir (0.7 -
C.	short wave-ir (1.3 -
D.	none of these
Answer» D. none of these

Discussion

19.	Due to perturbation of the orbit, satellite orbit parameters are frequently updated onmeasurements 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

20.	The ratio of the total solar radiant energy returned by a planetary body to the total radiant energyincident on the body, the called:
A.	reflectance
B.	reflectance factor
C.	albedo
D.	none of these
Answer» D. none of these

Discussion

21.	Remote sensing techniques make use of the properties of ___________ emitted, reflected ordiffracted by the sensed objects:
A.	electric waves
B.	sound waves
C.	electromagnetic waves
D.	wind waves
Answer» D. wind waves

Discussion

22.	sensor IFOV isproportional to:
A.	sin2
B.	cos2
C.	sec2
D.	tan2
Answer» D. tan2

Discussion

23.	Which one of the following parameters is considered to determine the reflectance of a vegetationcanopy?
A.	solar zenith angle
B.	azimuth angle
C.	look angle
D.	all of these
Answer» E.

Discussion

24.	Repetitive observations of the same area at equal interval of time are useful to monitor thedynamic phenomena:
A.	cloud evolution
B.	vegetative cover
C.	snow cover
D.	all of these
Answer» E.

Discussion

25.	A fold mountain is a type of landform that is created when two crustal plates
A.	Diverge
B.	Wrap
C.	Collide
D.	Converge
Answer» D. Converge

Discussion

26.	Consider the following parameters in respect of RADAR principle:1. It is an active sensing system.2. Electromagnetic radiation of wavelength is in centimetre range3. It operates in visible region.4. It comprises Radio detection and ranging.Which of the above statements am correct
A.	1, 2 and 3
B.	2, 3 and 4
C.	1, 2 and 4
D.	1, 2, 3 and 4
Answer» D. 1, 2, 3 and 4

Discussion

27.	Healthy broad leaves will show green color when observed uder normal color film, but they will show ______ color in IR (Infra - Red) color photograph.
A.	Brown to purple
B.	Green to Red
C.	Blue to Yellow
D.	Red to Magenta
Answer» E.

Discussion

28.	Pan-chromatic images are used for
A.	LOLC classification
B.	Plotting the contour map of an area
C.	Getting precise information of location of important features
D.	Hydrological studies
Answer» D. Hydrological studies

Discussion

29.	If S denotes the sum of all the angles of a spherical triangle then the quantity S - 180 is called as?
A.	Spherical error
B.	Spherical deficiency
C.	Spherical excess
D.	Spherical misclosure
Answer» D. Spherical misclosure

Discussion

30.	If a star whose declination is 60° N culminates at zenith its altitude at the lower culmination is _____.
A.	10°
B.	30°
C.	20°
D.	40°
Answer» C. 20°

Discussion

31.	In trimetrogon system of photography two of the three cameras are obliquely mounted at:
A.	20°
B.	45°
C.	60°
D.	90°
Answer» D. 90°

Discussion

32.	On a conformal projection
A.	The shape of any small geographical area is preserved
B.	Equivalent map maintains true relationships of area, at a given scale, for every part as well as the whole
C.	The scale is preserved in the direction perpendicular to the line of zero distortion
D.	The scale is preserved in the direction radially outward from a point of zero distortion.
Answer» B. Equivalent map maintains true relationships of area, at a given scale, for every part as well as the whole

Discussion

33.	IS – 95 cellular telephone system uses GPS to create time synchronization between the
A.	Land station
B.	Base station
C.	Space station
D.	Air station
Answer» C. Space station

Discussion

34.	Out of the following, which is the component of G.I.S.?
A.	Computer system
B.	Software
C.	Data management
D.	All of the above
Answer» E.

Discussion

35.	A graph showing reflectance characteristics with respect to wavelength is called:
A.	Spectral reflectance curve
B.	Spectral signature
C.	Spectral Band
D.	Spectral Emissivity curve
Answer» C. Spectral Band

Discussion

36.	Consider the following statements regarding the Remote Sensing Survey:1) Information transfer is accomplished by the use of electromagnetic radiation2) Remote Sensing from space is done by satellites3) Remote Sensing has no application in Earthquake predictionWhich of the above statements are correct?
A.	1 and 2 only
B.	1 and 3 only
C.	2 and 3 only
D.	1, 2 and 3
Answer» B. 1 and 3 only

Discussion

37.	Consider the following statements about Global Positioning Systems (GPS):1) The position of an object can be exactly determined by a single satellite2) The position of the observer (moving person or vehicle) on the ground is determined by an orbiting satellite3) Atomic clocks are fixed in satellites to calculate the positioning of the satellite to aid in determining travel times.4) Absolute positioning, where an accuracy of 1 cm to 5 cm is needed, depends upon the health of the satelliteWhich of the above statements are correct?
A.	1, 2 and 3 only
B.	1, 2 and 4 only
C.	1, 3 and 4 only
D.	2, 3 and 4 only
Answer» E.

Discussion

38.	A raster layer in GIS and Photogrammetry is one which gives information on
A.	Selected points in a region
B.	Specified areas
C.	attributes of all pixels
D.	colours of selected places
Answer» E.

Discussion

39.	Electromagnetic waves are characterised by :
A.	frequency
B.	wave length
C.	intensity
D.	All of these
Answer» E.

Discussion

40.	Which one of the following geometric errors of satellite sensors is random ?
A.	scan skew
B.	panoramic distortion
C.	earth rotation
D.	altitude variation
Answer» E.

Discussion

41.	The various stages of formation of snow are listed below :1. Formation of ice crystals2. Formation of snow pallets3. Formation of snow flakes4. Formationof snow crystals5. Formation of rimed crystalsWhich one of the following sequences is correct ?
A.	3 2 5 1 4
B.	5 3 1 2 4
C.	1 4 3 5 2
D.	1 3 4 2 5
Answer» D. 1 3 4 2 5

Discussion

42.	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

43.	Which one of the following statements is not correct?
A.	GIS technology is the same as traditional mapping
B.	GIS technology is a tool box for processing maps and fundamental concepts for spatial measurement
C.	GIS technology contains analytic capabilities for overlaying maps
D.	GIS technology is capable to study the environmental surrondings
Answer» B. GIS technology is a tool box for processing maps and fundamental concepts for spatial measurement

Discussion

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.	niether (a) nor (b)
Answer» D. niether (a) nor (b)

Discussion

45.	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.	none of the above
Answer» D. none of the above

Discussion

46.	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

47.	Due to scan geometery of a satellite sensor:
A.	the off-nadir resolution is degraded
B.	the ground distance swept by the senor, IFOV is proportional to sec2θ, where θ is the angle of scan measured from the nadir
C.	the details towards the edge of the scan get compressed
D.	All of these
Answer» E.

Discussion

48.	The maximum absorption of solar radiation due to ozone occurs at wave lengths:
A.	shorter than 0.3 μm
B.	shorter than 0.2 μm
C.	greater than 0.3 μm
D.	None of these
Answer» B. shorter than 0.2 μm

Discussion

49.	For perfect coherent radiation, which one of the following statement is correct?
A.	Both the waves must have single frequencies
B.	The directions of motion of both waves are parallel.
C.	The waves must be collimated
D.	All of these
Answer» E.

Discussion

50.	For interpolation of satellite data used for monitoring dynamic changes that occure 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

Explore topic-wise MCQs in Surveying.

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

The part radiation due to scattered/diffused radiation entering the field of view of a remotesensor other than that from the required target,

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

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

For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherencelength loch is:

In GPS, receivers used are;

Which onspeed (C) of the electromagnetic wave is correct?

The spectral region of the electromagnetic radiation which passes through the atmospherewithout much attenuation is known as:

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

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

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?

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

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

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

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

For interpolation of satellite data used for monitoring dynamic changes that occurs on the earthsurface, the most suitable orbit for the satellite is:

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

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

Due to perturbation of the orbit, satellite orbit parameters are frequently updated onmeasurements carried out by its

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

Remote sensing techniques make use of the properties of ___________ emitted, reflected ordiffracted by the sensed objects:

sensor IFOV isproportional to:

Which one of the following parameters is considered to determine the reflectance of a vegetationcanopy?

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

A fold mountain is a type of landform that is created when two crustal plates

Consider the following parameters in respect of RADAR principle:1. It is an active sensing system.2. Electromagnetic radiation of wavelength is in centimetre range3. It operates in visible region.4. It comprises Radio detection and ranging.Which of the above statements am correct

Healthy broad leaves will show green color when observed uder normal color film, but they will show ______ color in IR (Infra - Red) color photograph.

Pan-chromatic images are used for

If S denotes the sum of all the angles of a spherical triangle then the quantity S - 180 is called as?

If a star whose declination is 60° N culminates at zenith its altitude at the lower culmination is _____.

In trimetrogon system of photography two of the three cameras are obliquely mounted at:

On a conformal projection

IS – 95 cellular telephone system uses GPS to create time synchronization between the

Out of the following, which is the component of G.I.S.?

A graph showing reflectance characteristics with respect to wavelength is called:

A raster layer in GIS and Photogrammetry is one which gives information on

Electromagnetic waves are characterised by :

Which one of the following geometric errors of satellite sensors is random ?

The various stages of formation of snow are listed below :1. Formation of ice crystals2. Formation of snow pallets3. Formation of snow flakes4. Formationof snow crystals5. Formation of rimed crystalsWhich one of the following sequences is correct ?

Electromagnetic spectrum contains :

Which one of the following statements is not correct?

While propagating through homogeneous, isotropic media,

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

Critical angle of electromagnetic radiation takes place if

Due to scan geometery of a satellite sensor:

The maximum absorption of solar radiation due to ozone occurs at wave lengths:

For perfect coherent radiation, which one of the following statement is correct?

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