MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 104 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
_ The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:$? |
| A. | Ozone hole |
| B. | Atmospheric window |
| C. | Ozone window |
| D. | Black hole |
| Answer» C. Ozone window | |
| 52. |
_ A passive sensor uses:$? |
| 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 | |
| 53. |
_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$? |
| A. | h = dp/(B/H) |
| B. | h = (B/H) dp |
| C. | h = dp/(H/B) |
| D. | h = (H/B) dp |
| Answer» B. h = (B/H) dp | |
| 54. |
_Crop Acreage and Production Estimation (CAPE) was funded and taken up in 1983 by:$? |
| A. | USA |
| B. | European Union |
| C. | Russia |
| D. | India |
| Answer» E. | |
| 55. |
_Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects:$? |
| A. | Electric waves |
| B. | Sound waves |
| C. | Electromagnetic waves |
| D. | Wind waves |
| Answer» D. Wind waves | |
| 56. |
_Which one of the following errors is produced by platform characteristics of the sensor?$? |
| A. | Altitude variation |
| B. | Altitude |
| C. | Orbit drift |
| D. | All of these |
| Answer» E. | |
| 57. |
_Which one of the following helps to identify the objects on the earth surface?$? |
| A. | Atmospheric window |
| B. | Signature |
| C. | Radiometric error |
| D. | None of these |
| Answer» C. Radiometric error | |
| 58. |
_The changes in the reflectivity/emissivity with time, is called:$? |
| A. | Spectral variation |
| B. | Spatial variation |
| C. | Temporal variation |
| D. | None of these |
| Answer» D. None of these | |
| 59. |
_The most widely used antenna in GPS is$? |
| A. | Parabolic antenna |
| B. | Microstrip antenna |
| C. | Horn antenna |
| D. | Slotted antenna |
| Answer» C. Horn antenna | |
| 60. |
_Sensor IFOV is proportional to:$? |
| A. | sin² |
| B. | cos² |
| C. | sec² |
| D. | tan² |
| Answer» D. tan¬¨‚⧠| |
| 61. |
_Which one of the following statements is correct?$? |
| A. | The function of an information system is to improve one’s ability to make decisions |
| B. | The information system is the chain of operations |
| C. | A map is a collection of stored, analyzed data, its stored information is suitability used in making decisions |
| D. | All the above |
| Answer» E. | |
| 62. |
_Pick up the correct statement from the following:$? |
| 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» E. | |
| 63. |
_The infrared portion of EMR lies between$? |
| A. | 0.4 - 0.7 μm |
| B. | 0.5 mm to 1 μm |
| C. | 0.7 - 1.3 μm |
| D. | 0.7 to 14 μm |
| Answer» E. | |
| 64. |
Which one of the following quantities forms the basis of radiometry?$? |
| A. | Radiant energy (Q) |
| B. | Radiant flux (φ) |
| C. | Radiant intensity (I) |
| D. | All of these |
| Answer» E. | |
| 65. |
Pick up the important characteristic of a target which facilitates its identification from the following:$? |
| A. | Spectral variation |
| B. | Spatial variation |
| C. | Temporal variation |
| D. | All of these |
| Answer» E. | |
| 66. |
The object of photo-interpretation is:$? |
| A. | Identification |
| B. | Recognition of objects |
| C. | Judging the significance of objects |
| D. | All of these |
| Answer» E. | |
| 67. |
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:$? |
| A. | Sensors |
| B. | Passive sensors |
| C. | Active sensors |
| D. | None of these |
| Answer» D. None of these | |
| 68. |
Critical angle of electromagnetic radiation takes place if$? |
| 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. | |
| 69. |
The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:$? |
| A. | 10-10 to 106 m |
| B. | 10-8 to 106 m |
| C. | 10-10 to 1010 m |
| D. | 10-8 to 108 m |
| Answer» B. 10-8 to 106 m | |
| 70. |
The basic requirement of any sensor system is:$? |
| A. | Radiometric resolution |
| B. | Spatial resolution |
| C. | Spectral resolution |
| D. | All of these |
| Answer» E. | |
| 71. |
In the given figure the phase of$? |
| A. | Crest A is π/2 |
| B. | B crossing is π |
| C. | Trough C is 3π/2 |
| D. | All of these |
| Answer» E. | |
| 72. |
Geodimeter is based on:$? |
| A. | Propagation of modulated light waves |
| B. | Propagation of infrared radiation |
| C. | The visible light as carrier with frequency of the order of 5 √ó 1014 Hz |
| D. | High frequency radio waves |
| Answer» B. Propagation of infrared radiation | |
| 73. |
The coherence length over which there is a strong relationship between amplitudes is;$? |
| A. | Directly proportional to the bandwidth |
| B. | Inversely proportional to the bandwidth |
| C. | The square of the bandwidth |
| D. | None of these |
| Answer» C. The square of the bandwidth | |
| 74. |
For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is:$? |
| A. | 130 km |
| B. | 230 km |
| C. | 250 km |
| D. | 500 km |
| Answer» C. 250 km | |
| 75. |
Which one of the following parameters is accurate for DGPS?$? |
| A. | Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station |
| B. | Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station |
| C. | Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station |
| D. | Positional accuracies ~ 5 - 10 m if rover is less than 25 km |
| Answer» B. Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station | |
| 76. |
According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n‚ÇÅ) on another medium (refractive index m‚ÇÇ);$? |
| A. | The angle of incidence is equal to the angle of refraction |
| B. | The angle of refraction (θr) is given by sin θ₂ = (n₁/n₂) sin θi |
| C. | Both (A) and (B) |
| D. | Neither (A) nor (B) |
| Answer» C. Both (A) and (B) | |
| 77. |
The refractive index of the ocean water:$? |
| A. | Increases with salinity |
| B. | Increases with temperature |
| C. | Decreases with salinity |
| D. | Decreases with temperature |
| Answer» B. Increases with temperature | |
| 78. |
The value of energy quantum for radiation of any frequency is proportional to:$? |
| A. | The frequency |
| B. | The reciprocal of the energy |
| C. | The square of the frequency |
| D. | The square root of the frequency |
| Answer» B. The reciprocal of the energy | |
| 79. |
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 √ó 1014 Hz |
| D. | High frequency radio waves |
| Answer» B. Propagation of infrared radiation | |
| 80. |
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 | |
| 81. |
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 | |
| 82. |
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 - 5 m if rover is less than 2-5 km 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 - 5 m if rover is less than 2-5 km from the reference station | |
| 83. |
In the given figure the phase of? |
| A. | Crest A is π/2 |
| B. | B crossing is π |
| C. | Trough C is 3π/2 |
| D. | All of these |
| Answer» E. | |
| 84. |
The refractive index of the ocean water:? |
| A. | Increases with salinity |
| B. | Increases with temperature |
| C. | Decreases with salinity |
| D. | Decreases with temperature |
| Answer» B. Increases with temperature | |
| 85. |
According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n‚ÇÅ) on another medium (refractive index m‚ÇÇ);? |
| A. | The angle of incidence is equal to the angle of refraction |
| B. | The angle of refraction (θr) is given by sin θ₂ = (n₁/n₂) sin θi |
| C. | Both (A) and (B) |
| D. | Neither (A) nor (B) |
| Answer» C. Both (A) and (B) | |
| 86. |
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» B. The reciprocal of the energy | |
| 87. |
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» E. | |
| 88. |
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» E. | |
| 89. |
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» E. | |
| 90. |
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) | |
| 91. |
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. | |
| 92. |
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 | |
| 93. |
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 | |
| 94. |
In GPS, receivers are used are; |
| A. | Electronic clocks |
| B. | Atomic clocks |
| C. | Quartz clocks |
| D. | Mechanical clocks |
| Answer» D. Mechanical clocks | |
| 95. |
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. | |
| 96. |
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» D. None of these | |
| 97. |
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» B. Gaspard Felix Tournachon, a French scientist | |
| 98. |
If θ is the angle of scan measured from the nadir, the ground distance swept by the sensor IFOV is proportional to:# |
| A. | sin²θ |
| B. | cos²θ |
| C. | sec²θ |
| D. | tan²θ |
| Answer» D. tan¬¨‚â§≈í‚àè | |
| 99. |
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. | |
| 100. |
‘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 | |