Elements of Remote Sensing problems
- 1. The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface, are called :
Options- A. sensonrs
- B. passive sensors
- C. active sensors
- D. None of these Discuss
Correct Answer: active sensors
- 2. A reduction of nitrogen nutrient in plants :
Options- A. affects leaf colour
- B. reduces pigment concentration
- C. increase the visible reflectivity
- D. All of these Discuss
Correct Answer: All of these
- 3. The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths :
Options- A. 0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 ?m
- B. 2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 ?m
- C. 4.2 to 5.0, 7.0 to 15.0 ?m and 1 cm to 30 cm
- D. All of these Discuss
Correct Answer: All of these
- 4. Pick up the correct statement from the following :
Options- A. The distance between two successive crests or troughs of a wave, is called, the wave length
- B. The wave length is measured in metres and a fraction of a metre
- C. The wave length is generally denoted by ?
- D. The length of the crest from the mid point, is called amplitude
- E. All of these Discuss
Correct Answer: All of these
- 5. Pick up the important characteristic of a target which facilitates its identification from the following:
Options- A. spectral variation
- B. spatial variation
- C. temporal variation
- D. polarisation variation
- E. All of these Discuss
Correct Answer: All of these
- 6. The basic requirement of any sensor system, is :
Options- A. radiometric resolution
- B. spatial resolution
- C. spectral resolution
- D. temporal resolution
- E. All of these Discuss
Correct Answer: All of these
- 7. Which one of the following parameters is accurate for DGPS.
Options- 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 Discuss
Correct Answer: Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station
- 8. The various stages occuring in GPS system are described below :
1. Generation of an output to the user
2. Detection of the GPS signal
3. Processing the data in the built-in-computer
4. Decoding the GPS signal.
The correct sequence of the stages is :
Options- A. 1, 2, 3, 4
- B. 2, 3, 4, 1
- C. 2, 4, 3, 1
- D. 3, 1, 2 , 4 Discuss
Correct Answer: 2, 4, 3, 1
- 9. Which one of the following statements is correct?
Options- 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 Discuss
Correct Answer: All of these
- 10. Pick up the correct statement from the following:
Options- A. Phase of a wave is expressed as a fraction of a period with respect to a refrence
- 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 Discuss
Correct Answer: All of these
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