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Civil Engineering
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Elements of Remote Sensing
Comments
Question
Which one of the following attributes is not associated with digital maps
Options
A. colour
B. symbology
C. legends
D. south arrow
Correct Answer
south arrow
Elements of Remote Sensing problems
Search Results
1. In GPS, receivers are used are ;
Options
A. electronic clocks
B. atomic clocks
C. quartz clocks
D. mechanical clocks
Show Answer
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Discuss
Correct Answer: quartz clocks
2. 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
Options
A.
B.
C.
D.
Show Answer
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Correct Answer:
3. Electromagnetic spectrum contains :
Options
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. radio rays (wave length > 1 m)
E. All of these
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Correct Answer: All of these
4. Which one of the following factors does not affect the scale of the air photographs :
Options
A. focal length
B. flying height
C. ground elevation
D. None of these
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Correct Answer: None of these
5. Formation of snow occurs if the cloud temperature is
Options
A. just above the freezing point
B. at the freezing point
C. below the freezing point
D. None of these
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Correct Answer: below the freezing point
6. Which one of the following statement is incorrect regarding the electromagnetic radiation?
Options
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
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Correct Answer: None of these
7. Which one of the following statements is correct?
Options
A. Each satellite of the GPS system transmits two L band signals.
B. The two L band signals are modulated by the Pseudorandom binary codes (PN).
C. The GPS receiver reads the specific code of the satellite.
D. The PN code determines the time taken by the receiver to reach the receiver which is converted into distance
E. All of these
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Correct Answer: All of these
8. In sun light, water rich in phytoplanktons appears :
Options
A. red
B. green
C. brown
D. blue
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Correct Answer: green
9. Pick up the correct statement from the following:
Options
A. Water molecules and salt-ions in the ocean scatter the lower wave length more
B. An increase in the back scattering coefficient with shorter wave length gives a deep blue colour for clear oceanic water
C. The ratio of the upwelling irradiance just below the surface and downwelling irradiance just above the surface is called reflectance ratio.
D. All of these
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Correct Answer: All of these
10. The semi-infinite snow albedo is proportional to the square root of the grain radius :
Options
A. in the 0.2 to 0.4 ?m wave length region
B. in the 0.4 to 0.8 ?m wave length region
C. in the 0.8 to 1.2 ?m wave length
D. None of these
Show Answer
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Correct Answer: in the 0.4 to 0.8 ?m wave length region
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