Elements of Remote Sensing MCQs

Question 1

The main functional blocks of a multispectral scanner (MSS) are given below :1. Video processor2. Dispersive system3. Detector4. Signal conditioner5. Collecting opticsWhich one of the following sequences is correct?

Accepted Answer

5,2,3,1,4

Answer

1,4,5,3,2

Answer

5,3,2,4,1

Answer

1,3,2,4,5

Question 2

Snow cover on the earth surface :

Accepted Answer

All the above

Answer

gives the highest reflectance in the visible spectrum

Answer

shows marked variation in its reflectance characteristics

Answer

Shows side variation in the grain size

Question 3

The various stages of formation of snow are listed below :1. Formation of ice crystals2. Formation of snow pallets3. Formation of snow flakes4. Formationof snow crystals5. Formation of rimed crystalsWhich one of the following sequences is correct ?

Accepted Answer

1,4,3,5,2

Answer

3,2,5,1,4

Answer

5,3,1,2,4

Answer

1,3,4,2,5

Question 4

Snow consists of

Accepted Answer

All of these

Answer

snow crystals

Answer

rimed snow crystals

Answer

snow flakes

Question 5

Fresh and pure snow reflectance

Accepted Answer

All of these

Answer

is very high in visible region

Answer

falls off steeply in the near-IR region

Answer

remains low for longer wave lengths

Question 6

Snow albedo is affected by :

Accepted Answer

All of these

Answer

wave length

Answer

grain size

Answer

solar zenith angle

Question 7

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

Accepted Answer

in the 0.4 to 0.8 gm wave length region

Answer

in the 0,2 to 0.4 gm wave length region

Answer

in the 0.8 to 1.2 gm wave length

Answer

None of these

Question 8

The optical property of a water body depends on:

Accepted Answer

All of these

Answer

absorption by the disolved material

Answer

absorption by the suspended particulate matter

Answer

scattering by the surpended particulate matter

Question 9

Phytoplanktons

Accepted Answer

All of these

Answer

are microscopic plants

Answer

are the first link in all the aquatic and marine food chains

Answer

convert solar energy, dissolved carbon and nitrogen into organic biomass