Elements of Remote Sensing MCQs

Question 1

Orbital radius of GPS satellites is approximately:

Accepted Answer

26,600 km

Answer

15,200 km

Answer

18,400 km

Answer

36,000 km

Question 2

Spatial variation in horizontal and vertical directions is caused due to:

Accepted Answer

All of these

Answer

Physical weathering of rocks

Answer

Chemical weathering of rocks

Answer

Biological weathering of rocks

Question 3

Which one of the following quantities forms the basis of radiometry?

Accepted Answer

All of these

Answer

Radiant energy (Q)

Answer

Radiant flux (φ)

Answer

Radiant intensity (I)

Question 4

The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called:

Accepted Answer

Spatial variation

Answer

Spectral variation

Answer

Temporal variation

Answer

None of these

Question 5

Which one of the following statements is correct?

Accepted Answer

All of these

Answer

During the day, earth reflects solar radiation

Answer

During the day, earth reflects both solar radiations the emission from its surface

Answer

During the night, earth emits radiation from its surface

Question 6

‘A’ and ‘B’ are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?

Accepted Answer

Height displacement of A will be less than that of B

Answer

Height displacement of B will be less than that of A

Answer

Height displacement of A and B is equal

Answer

Height displacement of A and B will be towards each other

Question 7

Which one of the following statements is correct?

Accepted Answer

All of these

Answer

Snow albedo falls at all wave length with the increase of grain size

Answer

The effect of grain size on reflection is maximum in the near-IR region

Answer

The effect of grain size on reflection is low in the visible region of the spectrum

Question 8

Which one of the following statements is correct?

Accepted Answer

All the above

Answer

The function of an information system is to improve one’s ability to make decisions

Answer

The information system is the chain of operations

Answer

A map is a collection of stored, analyzed data, its stored information is suitability used in making decisions

Question 9

Which one of the following statements is correct?

Accepted Answer

All of these

Answer

π radians equal to 180°

Answer

The cone subtended by an area on the sphere at the centre, is called the solid angle

Answer

The solid angle is equal to the ratio of the area on the sphere and the square of the radius of the sphere