McqMate
1. |
Pick up the correct statement from the following: |
A. | topology describes the geometric characteristic of objects which do not change under transformations and are independent of any coordinate system |
B. | topological characteristics of an object are independent of scale measurement |
C. | the three elements of topology are adjacency, containment, and connectivity |
D. | all of these |
Answer» D. all of these |
2. |
Pick up the correct statement from the following: |
A. | in remote sensing technique, the observation place, is called a platform |
B. | platforms may be either stationary or mobile |
C. | spatial resolution of the imaging system becomes poorer with increase of platform height |
D. | all of these |
Answer» D. all of these |
3. |
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» C. below the freezing point |
4. |
In the given figure the phase of |
A. | crest a |
B. | b |
C. | trough c is 3 |
D. | all of these |
Answer» D. all of these |
5. |
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» C. constant in time and space |
6. |
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» B. inversely proportional to the bandwidth |
7. |
Pick up the correct statement from the following: |
A. | a graphical representation of spectral reflectance verses the various growth stages of a crop, depicts a phonologic pattern |
B. | the changes in the polarisation of the radiation reflected or emitted by an object, is known as polarisation variation |
C. | the degree of polarisation is a characteristic of the object which helps in the identification of the object |
D. | all of these |
Answer» D. all of these |
8. |
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» D. all of these |
9. |
Which one of the following parameters is considered to determine the reflectance of a vegetation canopy? |
A. | solar zenith angle |
B. | azimuth angle |
C. | look angle |
D. | all of these |
Answer» D. all of these |
10. |
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» D. all the above |
11. |
sensor IFOV is proportional to: |
A. | sin2 |
B. | cos2 |
C. | sec2 |
D. | tan2 |
Answer» C. sec2 |
12. |
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» D. all of these |
13. |
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» B. angle of incidence = angle of reflection |
14. |
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» D. none of these |
15. |
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» C. both (a) and (b) |
16. |
The optical property of a water body depends on: |
A. | absorption by the dissolved material |
B. | absorption by the suspended particulate matter |
C. | scattering by the suspended particulate matter |
D. | all of these |
Answer» D. all of these |
17. |
Pick up the correct statement from the following: |
A. | frequency is the number of wave crests passing a fixed point in one second |
B. | frequency of a wave is measured in hertz (hz) |
C. | amplitude of a wave is the height of its crust from the mid-point |
D. | all of these |
Answer» D. all of these |
18. |
The object of photo-interpretation is: |
A. | identification |
B. | recognition of objects |
C. | judging the significance of objects |
D. | all of these |
Answer» D. all of these |
19. |
Pick up the correct statement from the following: |
A. | phytoplankton contains photosynthetically active pigment |
B. | an increase of phytoplankton increases the back scattering in the green region |
C. | an increase of phytoplankton absorbs the bule region rapidly |
D. | an increase of phytoplankton decreases the back scattering in the green region |
Answer» D. an increase of phytoplankton decreases the back scattering in the green region |
20. |
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» D. all of these |
21. |
Which one of the following statements is correct? |
A. | during the day, earth reflects solar radiation |
B. | during the day, earth reflects both solar radiations the emission from its surface |
C. | during the night, earth emits radiation from its surface |
D. | all of these |
Answer» D. all of these |
22. |
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» D. all of these |
23. |
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» C. electromagnetic waves |
24. |
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» D. none of these |
25. |
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» C. 36,000 km |
26. |
The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called: |
A. | reflectance |
B. | reflectance factor |
C. | albedo |
D. | none of these |
Answer» C. albedo |
27. |
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. | all of these |
Answer» D. all of these |
28. |
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» A. positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station |
29. |
Crop Acreage and Production Estimation (CAPE) was funded and taken up in 1983 by: |
A. | usa |
B. | european union |
C. | russia |
D. | india |
Answer» D. india |
30. |
'A time varying electric field produces a magnetic field.' This phenomenon is called: |
A. | hertz\s law |
B. | ampere maxwell\s law |
C. | faraday\s law |
Answer» B. ampere maxwell\s law |
31. |
The changes in the reflectivity/emissivity with time, is called: |
A. | spectral variation |
B. | spatial variation |
C. | temporal variation |
D. | none of these |
Answer» C. temporal variation |
32. |
Which one of the following statements is correct? |
A. | snow albedo falls at all wave length with the increase of grain size |
B. | the effect of grain size on reflection is maximum in the near-ir region |
C. | the effect of grain size on reflection is low in the visible region of the spectrum |
D. | all of these |
Answer» D. all of these |
33. |
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» B. five ground stations |
34. |
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» B. signature |
35. |
Pick up the correct statement from the following: |
A. | phase of a wave is expressed as a fraction of a period with respect to a reference |
B. | phase is usually specified by angular measure with one period being 360° |
C. | the reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction |
D. | all of these |
Answer» D. all of these |
36. |
The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared: |
A. | visible (0.4 - |
B. | near-ir (0.7 - |
C. | short wave-ir (1.3 - |
D. | none of these |
Answer» C. short wave-ir (1.3 - |
37. |
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: |
A. | passive remote sensing |
B. | active remote sensing |
C. | neutral remote sensing |
D. | none of these |
Answer» B. active remote sensing |
38. |
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» B. sun-synchronous orbit |
39. |
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» D. all of these |
40. |
Which one of the following quantities forms the basis of radiometry? |
A. | radiant energy (q) |
B. | radiant flux ( ) |
C. | radiant intensity (i) |
D. | all of these |
Answer» D. all of these |
41. |
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» B. the angle of refraction r) is given by sin i |
42. |
The refractive index of the ocean water: |
A. | increases with salinity |
B. | increases with temperature |
C. | decreases with salinity |
D. | decreases with temperature |
Answer» A. increases with salinity |
43. |
The normal altitude of GPS satellite is about |
A. | 16,200 km |
B. | 20,200 km |
C. | 24,400 km |
D. | 36,100 km |
Answer» B. 20,200 km |
44. |
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» A. propagation of modulated light waves |
45. |
The code based GPS receivers are generally used for: |
A. | vehicle tracking |
B. | land navigation |
C. | trans movement |
D. | all of these |
Answer» D. all of these |
46. |
Pick up the correct statement from the following: |
A. | the refractive index of a medium varies according to the wavelength of the radiation, |
B. | the variation of the refractive index with wave length, is called dispersion, |
C. | the splitting of colours of white light by passing through a prism is caused due to dispersion |
D. | all of these |
Answer» D. all of these |
47. |
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. | neither (a) nor (b) |
Answer» C. both (a) and (b) |
48. |
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» B. spatial variation |
49. |
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» D. all of these |
50. |
Leaf reflectance depends primarily on: |
A. | the pigments |
B. | internal cell structure |
C. | equivalent water content |
D. | all of these |
Answer» D. all of these |
51. |
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» A. h = dp/(b/h) |
52. |
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» D. angle of refraction is equal to 90° |
53. |
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» D. all of these |
54. |
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» D. 100 km |
55. |
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» D. all of these |
56. |
Which one of the following residual biases involves the GPS accuracy? |
A. | satellite dependent biases due to uncertainty in the orbital parameters of the satellite |
B. | receiver-dependent biases due to clock stability with line |
C. | signal propagation biases due to the sphere and troposphere propagation |
D. | all the above |
Answer» D. all the above |
57. |
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» A. height displacement of a will be less than that of b |
58. |
The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is: |
A. | 8 |
B. | 12 |
C. | 16 |
D. | 24 |
Answer» D. 24 |
59. |
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» D. all of these |
60. |
The value of energy quantum for radiation of any frequency is proportional to: |
A. | the frequency |
B. | the reciprocal of the energy |
C. | the square of the frequency |
D. | the square root of the frequency |
Answer» A. the frequency |
61. |
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» D. altitude variation |
62. |
Pick up the correct statement from the following: |
A. | the first man-made satellite, sputnik-l\ was launched on 4th october, 1957 |
B. | the united state\s explorer 6 transmitted the first picture of the earth in august 1959 |
C. | television infrared observation satellite (tiros) designed for meteorological observations, started systematic earth observations from space from 1, april, 1960 |
D. | all of these |
Answer» D. all of these |
63. |
Which one of the following frequency regions is a part of sun's radiation? |
A. | ultraviolet frequency region |
B. | infrared frequency region |
C. | radio frequency region |
D. | all of these |
Answer» D. all of these |
64. |
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» B. atmospheric window |
65. |
Which on speed (C) of the electromagnetic wave is correct? |
A. | c = v |
B. | c = /v |
C. | c = v |
D. | c = 1/ |
Answer» C. c = v |
66. |
In GPS, receivers used are; |
A. | electronic clocks |
B. | atomic clocks |
C. | quartz clocks |
D. | mechanical clocks |
Answer» C. quartz clocks |
67. |
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» B. 230 km |
68. |
Which one of the following attributes is not associated with digital maps |
A. | colour |
B. | symbology |
C. | legends |
D. | south arrow |
Answer» D. south arrow |
69. |
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» C. active sensors |
70. |
The most widely used antenna in GPS is |
A. | parabolic antenna |
B. | microstrip antenna |
C. | horn antenna |
D. | slotted antenna |
Answer» B. microstrip antenna |
71. |
Orbital radius of GPS satellites is approximately: |
A. | 15,200 km |
B. | 26,600 km |
C. | 18,400 km |
D. | 36,000 km |
Answer» B. 26,600 km |
72. |
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/ |
B. | cm |
C. | cm |
D. | none of these |
Answer» B. cm |
73. |
The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor 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» A. reduces the contrast of the image and also its sharpness |
74. |
Pick up the correct statement from the following |
A. | the ratio of the up flux and down flux just above the snow surface, is called albedo |
B. | spectral albedo of snow is calculated for the semi-infinite snow thickness |
C. | water equivalent height of snow is the height of water column obtained by melting snow |
D. | all of these |
Answer» D. all of these |
75. |
Spatial variation in horizontal and vertical directions is caused due to: |
A. | physical weathering of rocks |
B. | chemical weathering of rocks |
C. | biological weathering of rocks |
D. | all of these |
Answer» D. all of these |
76. |
The basic requirement of any sensor system is: |
A. | radiometric resolution |
B. | spatial resolution |
C. | spectral resolution |
D. | all of these |
Answer» D. all of these |
77. |
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» A. sun as the source of energy |
78. |
Who coined the term, 'Remote sensing'. |
A. | evelyn l. pruitt, a geographer |
B. | gaspard felix tournachon, a french scientist |
C. | wilbur wright, an italian scientist |
D. | none of these |
Answer» A. evelyn l. pruitt, a geographer |
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