Civil Engineering MCQs

Page No. 76

Consider the following statements regarding the satellite imaging_________________?


aThe satellite orbit is fixed in the inertial space


bDuring successive across-track imaging, the earth rotates beneath the sensor


cThe satellite images a skewed area


dAll of the above


View Answer All of the above

The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________?


a10-10 to 106 m


b10-8 to 106 m


c10-10 to 1010 m


d10-8 to 108 m


View Answer 10-10 to 106 m

Which one of the following residual biases involves the GPS accuracy ?


aSatellite dependent biases due to uncertainty in the orbital parameters of the satellite


bReceiver -dependent biases due to clock stability with line


cSignal propagation biases due to the sphere and troposphere propagation


dAll the above


View Answer All the above

Critical angle of electromagnetic radiation takes place if__________________?


aAngle of incidence is equal to angle of refraction


bAngle of incidence is greater than the angle of refraction


cAngle of incidence is equal to 90°


dAngle of refraction is equal to 90°



Leaf reflectance depends primarily on______________?


aThe pigments


b Internal cell structur


cEquivalent water content


dAll of these


View Answer All of these

Which one of the following errors is produced by platform characteristics of the sensor ?


a Altitude variation


bAltitude


cOrbit drift


d All of these


View Answer All of these

If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height___________________?


ah = dp/(B/H)


b h = (B/H) dp


c h = dp/(H/B)


d h = (H/B) dp


View Answer h = dp/(B/H)

Pick up the correct statement from the following_________________?


aWhen the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed


bWhen the electric vector is in the plane of incidence, vertical polarisation is formed


c When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed


dAll of these


View Answer All of these

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


aSpectral variation


bSpatial variation


cTemporal variation


dNone of these


View Answer Spatial variation

Geodimeter is based on_________________?


aPropagation of modulated light waves


bPropagation of infrared radiation


cThe visible light as carrier with frequency of the order of 5 × 1014 Hz


dHigh frequency radio waves



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