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Elements Of Remote Sensing Online Exam Quiz

Important questions about Elements Of Remote Sensing. Elements Of Remote Sensing MCQ questions with answers. Elements Of Remote Sensing exam questions and answers for students and interviews.

1. Consider the following statements regarding the satellite imaging : 1. The satellite orbit is fixed in the inertial space 2. During successive across-track imaging, the earth rotates beneath the sensor 3. 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

2. 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

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

4. 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

5. 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 : radio rays (wave length > 1 m)

7. In GPS, receivers are used are ;


A : electronic clocks

B : atomic clocks

C : quartz clocks

D : mechanical clocks

8. Which one of the following attributes is not associated with digital maps


A : colour

B : symbology

C : legends

D : south arrow

9. 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

10. Which one of the following statements is correct?


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

1. In sun light, water rich in phytoplanktons appears :


A : red

B : green

C : brown

D : blue

3. The semi-infinite snow albedo is proportional to the square root of the grain radius :


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

4. 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

5. Snow albedo is affected by :


A : wave length

B : grain size

C : solar zenith angle

D : snow pack thickness

6. The energy transported by the electromagnetic wave is proportional to :


A : the altitude of the wave

B : the square of the altitude of the wave

C : the cube of the altitude of the wave

D : the square roof of the amplitude

8. Which one of the following is incorrect statement? While passing through the atmosphere, the solar radiation,


A : remains unaffected

B : gets scattered

C : gets absorbed partially

D : None of these

9. Which one of the following statements is correct?


A : The ratio of the permitivity of a medium and the free space, is called relative permitivity.

B : Dielectric constant is a pure number and has no dimensions.

C : The dielectric constant of pure water is 80.

D : Higher the dielectric constant of a medium, the poorer is its electric conductivity.

10. 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.

1. 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

2. In sun-light water poor in phyto plank tons appears :


A : deep blue

B : red

C : green

D : yellow

3. The range measurements in GPS are made with :


A : 3 L - band frequencies

B : 2 L - band frequencies

C : 2 C - band frequencies

D : 3 C - band frequencies

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