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MCQs 1: 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/εμ Cm = 1/√8 μ Cm = 5/√εμ None of these
Answer Explanation

MCQs 2: 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
Answer Explanation

MCQs 3: 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
Answer Explanation

MCQs 4: The basic requirement of any sensor system is___________________?

Radiometric resolution Spatial resolution Spectral resolution All of these
Answer Explanation

MCQs 5: A passive sensor uses ________________?

Sun as the source of energy Flash light as a source of energ Its own source of energy None of these
Answer Explanation

MCQs 6: Who coined the term, ‘Remote sensing_______________?

Evelyn L. Pruitt, a geographer Gaspard Felix Tournachon, a French scientist Wilbur Wright, an Italian scientist None of these
Answer Explanation

MCQs 7: “An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media”. This phenomenon is known as___________________?

Fresnel reflection Fresnel refraction Snell’s law None of these
Answer Explanation

MCQs 8: Orbital radius of GPS satellites is approximately ___________________?

15,200 km 26,600 km 18,400 km 36,000 km
Answer Explanation

MCQs 9: The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________?

Sensors Passive sensors Active sensors None of these
Answer Explanation

MCQs 10: The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as__________________?

Ozone hole Atmospheric window Ozone window Black hole
Answer Explanation

MCQs 11: The refractive index of the ocean water_______________?

Increases with salinity Increases with temperature Decreases with salinity Decreases with temperature
Answer Explanation

MCQs 12: The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called____________________?

Passive remote sensing Active remote sensing Neutral remote sensing None of these
Answer Explanation

MCQs 13: Which one of the following parameters is accurate for DGPS ?

Positional accuracies ~ 1 – 2 m if rover is less than 1-2 km from the reference station Positional accuracies ~ 2 – 5m if rover is less than 2-5 fm from the reference station Positional accuracies ~ 5 – 10 m if rover is less than 5-10 km from reference station Positional accuracies ~ 5 – 10 m if rover is less than 25 km
Answer Explanation

MCQs 14: Due to scan geometry of a satellite sensor____________________?

The off-nadir resolution is degraded The ground distance swept by the senor, IFOV is proportional to sec2 of scan measured from the nadir The details towards the edge of the scan get compressed All of these
Answer Explanation

MCQs 15: The altitudinal distance of a geostationary satellite from the earth is about_________________?

26,000 km 30,000 km 36,000 km 44,000 km
Answer Explanation

MCQs 16: Remote sensing techniques make use of the properties of ______________ emitted, reflected or diffracted by the sensed objects?

Electric waves Sound waves Electromagnetic waves Wind waves
Answer Explanation

MCQs 17: The object of photo-interpretation is__________________?

Identification Recognition of objects Judging the significance of objects All of these
Answer Explanation

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