Elements Of Remote Sensing Mcqs

This set of Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ Elements Of Remote Sensing ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Civil Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Elements Of Remote Sensing comprehensively.

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1.
Which one of the following statements is correct regarding the GPS satellites ?

The nominal altitude is about 20,200 km

The inclination of axis satellite is 55°

The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)

All of these

2.
A reduction of nitrogen nutrient in plants_______________?

Affects leaf colour

Reduces pigment concentration

Increase the visible reflectivity

All of these

3.
Which one of the following statement is incorrect regarding the electromagnetic radiation ?

These are produced by the motion of electric charge

The oscillation of charged particles sets up changing electric fields

The changing electric fields induce the changing magnetic fields in the surrounding medium

None of these

4.
The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called________________?

Reflectance

Reflectance factor

Albedo

None of these

5.
Which one of the following helps to identify the objects on the earth surface ?

Atmospheric window

Signature

Radiometric error

None of these

6.
The changes in the reflectivity/emissivity with time, is called ?

Spectral variation

Spatial variation

Temporal variation

None of these

7.
Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its_______________________?

Six ground stations

Five ground stations

Four ground stations

Three ground stations

8.
The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared______________?

Visible (0.4 –

Near-IR (0.7 –

Short wave-IR (1.3 –

None of these

9.
For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is______________?

Circular orbit

Sun-synchronous orbit

Near polar orbit

None of these

10.
Which one of the following quantities forms the basis of radiometry ?

Radiant energy (Q)

Radiant flux (Φe )

Radiant intensity (I)

All of these

11.
Electromagnetic spectrum contains________________?

Gamma rays (wave length < 10-10 m)

Ultraviolet rays (wave length < 10-6 m)

Infrared rays (wave length < 10 -4 m)

All of these

12.
According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?

The angle of incidence is equal to the angle of refraction

The angle of refraction r) is given by sin i

Both A. and B.

Neither A. nor B.

13.
Pick up the correct definition from the following with response to GIS_______________?

Common boundary between two areas of a locality is known as adjacency

The area features which are wholly contained within another area feature, is known so containment

The geometric property which describes the linkage between line features is defined as connectivity

All of these

14.
The various stages occuring in GPS system are described below ?

1. Generation of an output to the user
2. Detection of the GPS signals
3. Processing the data in the built-in-computer
4. Decoding the GPS signal

The correct sequence of the stages is?

1, 2, 3, 4

2, 3, 4, 1

2, 4, 3, 1

3, 1, 2 , 4

15.
The normal altitude of GPS satellite is about________________?

16,200 km

20,200 km

24,400 km

36,100 km

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