Elements of Remote Sensing MCQs

Question 1

In which part of the reflective optical infrared region, the effect of multiple leaves in vegetation canopy is maximum?

Accepted Answer

The near-IR (0.7 ? 1.3 gm) region

Answer

The visible (0.4 ? 0.7 gm) region

Answer

The short wave IR (1.3 ?2.7 gm) region

Answer

In all the above region

Question 2

The leaf area index (LAI) is :

Accepted Answer

one sided leaf area per unit area of the ground

Answer

two sided leaf area per unit area of the ground

Answer

the average of the two sided area per unit area of the ground

Answer

None of these

Question 3

Leaf reflactance depends primarily on :

Accepted Answer

All of these

Answer

the pigments

Answer

internal cell structure

Answer

equivalent water content

Question 4

A reduction of nitrogen nutrient in plants :

Accepted Answer

All of these

Answer

affects leaf colour

Answer

reduces pigment concentration

Answer

increase the visible reflectivity

Question 5

Due to scan geometery of a satellite sensor :

Accepted Answer

All of these

Answer

the of:-nadir resolution is degraded

Answer

the ground distance swept by the senor, IFOV is proportional to sec2 0, where 0 is the angle of scan measured from the nadir

Answer

the details towards the edge of the scan get compressed

Question 6

If 0 is the angle of scan measured from the nadir, the ground distance swept by the sensor IFOV is proportional to:

Accepted Answer

sec2 0

Answer

sin2 0

Answer

cos2 0

Answer

tan2 0

Question 7

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 areaWhich one of the following statements is/are correct ?

Accepted Answer

1 2 3

Answer

1 3

Answer

2 3

Answer

1 2

Question 8

Pick up the correct statement from the following :

Accepted Answer

All of the above

Answer

For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the the aerial photograph.

Answer

The scale of the aerial photograph depends upon the scale of the topography

Answer

The feature at the principal point has no height displacement.

Question 9

A remote sensor photographic camera :

Accepted Answer

All the above

Answer

responses spectrum up to about 0.9 um

Answer

does not cover short wave IR region

Answer

does not cover thermal IR region