Civil Engineering MCQs

Page No. 78

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


aSix ground stations


bFive ground stations


cFour ground stations


dThree ground stations


View Answer Five ground stations

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


aSpectral variation


bSpatial variation


cTemporal variation


dNone of these


View Answer Temporal variation

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


a Atmospheric window


bSignature


c Radiometric error


dNone of these


View Answer Signature

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


aReflectance


bReflectance factor


cAlbedo


dNone of these


View Answer Albedo

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


aThese are produced by the motion of electric charge


bThe oscillation of charged particles sets up changing electric fields


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


dNone of these


View Answer None of these

A reduction of nitrogen nutrient in plants_______________?


aAffects leaf colour


b Reduces pigment concentration


cIncrease the visible reflectivity


dAll of these


View Answer All of these

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


aThe nominal altitude is about 20,200 km


bThe inclination of axis satellite is 55°


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


d All of these


View Answer All of these

The optical property of a water body depends on ?


aAbsorption by the dissolved material


bAbsorption by the suspended particulate matter


cScattering by the suspended particulate matter


dAll of these


View Answer All of these

Which one of the following statements regarding remote sensing is correct ?


aThe interaction of the electromagnetic radiation with the target


bThe emission of electromagnetic radiation from the target


c Both A. and B.


dNeither A. nor B.


View Answer Both A. and B.

Which one of the following factors does not affect the scale of the air photographs ?


aFocal length


b Flying height


cGround elevation


dNone of these


View Answer None of these

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