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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31.
DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within___________________?

25 km

50 km

75 km

100 km

32.
Earth observations from a satellite platform provide____________?

Synoptic view of a large area

Constant solar zenith angles and similar illumination conditions

Repetitive observations of the same area with intervals of a few minutes to a few weeks

All of these

33.
Pick up the important characteristic of a target which facilitates its identification from the following ?

Spectral variation

Spatial variation

Temporal variation

All of these

34.
The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is_______________?

8

12

16

24

35.
The value of energy quantum for radiation of any frequency is proportional to________________?

The frequency

The reciprocal of the energy

The square of the frequency

The square root of the frequency

36.
Which one of the following geometric errors of satellite sensors is random ?

Scan skew

Panoramic distortion

Earth rotation

Altitude variation

37.
Which one of the following frequency regions is a part of sun’s radiation ?

Ultraviolet frequency region

Infrared frequency region

Radio frequency region

All of these

39.
For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is_____________?

130 km

230 km

250 km

500 km

40.
In GPS, receivers used are___________________?

Electronic clocks

Atomic clocks

Quartz clocks

Mechanical clocks

41.
Which one of the following attributes is not associated with digital maps_______________?

Colour

Symbology

Legends

South arrow

42.
The most widely used antenna in GPS is_______________?

Parabolic antenna

Microstrip antenna

Horn antenna

Slotted antenna

43.
If electric permittivity and magnetic permeability of the medium are respectively and , then the velocity (Cm) of the electromagnetic wave in the medium is given by___________________?

Cm = 1/

Cm

Cm

None of these

44.
Spatial variation in horizontal and vertical directions is caused due to_________________?

Physical weathering of rocks

Chemical weathering of rocks

Biological weathering of rocks

All of these

45.
The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target_________________?

Reduces the contrast of the image and also its sharpness

Increases the contrast of the image but reduces the sharpness

Increases both the contrast and sharpness

Reduces the contrast but increases the sharpness

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