MCQOPTIONS
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MCQOPTIONS
This section includes 202 Mcqs, each offering curated multiple-choice questions to sharpen your Surveying knowledge and support exam preparation. Choose a topic below to get started.
| 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. | |
| 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 | |
| 53. |
In GPS, receivers are used are ; |
| A. | electronic clocks |
| B. | atomic clocks |
| C. | quartz clocks |
| D. | mechanical clocks |
| Answer» D. mechanical clocks | |
| 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. | |
| 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. | |
| 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. | |
| 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 | |
| 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 | |
| 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. | |
| 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 | |
| 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 | |
| 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 | |
| 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. | |
| 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 | |
| 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. | |
| 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 | |
| 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. | |
| 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 | |
| 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. | |
| 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 | |
| 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. | |
| 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 | |
| 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 | |
| 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 | |
| 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. | |
| 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. | |
| 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 | |
| 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 | |
| 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. | |
| 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 | |
| 81. |
Snow albedo is affected by : |
| A. | wave length |
| B. | grain size |
| C. | solar zenith angle |
| D. | All of these |
| Answer» E. | |
| 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 | |
| 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. | |
| 84. |
Which one of the following attributes is not associated with digital maps |
| A. | colour |
| B. | symbology |
| C. | legends |
| D. | south arrow |
| Answer» E. | |
| 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) | |
| 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 | |
| 87. |
The basic requirement of any sensor system, is : |
| A. | radiometric resolution |
| B. | spatial resolution |
| C. | spectral resolution |
| D. | All of these |
| Answer» E. | |
| 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 | |
| 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 | |
| 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. | |
| 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. | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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. | |
| 97. |
Snow consists of |
| A. | snow crystals |
| B. | rimed snow crystals |
| C. | snow flakes |
| D. | All of these |
| Answer» E. | |
| 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. | |
| 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 | |
| 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 | |