Introduction to remote sensing - Common Section - Geology & Geophysics Previous Year Questions

1

2009 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2009

In satellite remote-sensing, the spectral bands near 1.4 μm and 1.9 μm are avoided because of

A

absorption due to H2O and CO2 in the atmosphere

B

absorption due to ozone layer in the atmosphere

C

absorption due to nitrogen in the atmosphere

D

absorption by vegetation

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2

2011 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2011

Which of the following bands (in micrometre) is NOT suitable for earth observation in satellite remote sensing?

A

0.30–0.35

B

0.53–0.58

C

0.62–0.67

D

0.74–0.78

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3

2012 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2012

On a photo-scale of 1:40000, a square shaped open cast coal mine of 1 km² area would have an area of (in cm²)

A

2.50

B

4.00

C

6.25

D

12.00

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4

2012 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2012

Vertical exaggeration commonly occurs during stereo-viewing of aerial photographs. Where does it occur?

A

In the photographs

B

In the terrain

C

In the stereoscope

D

In the percepetor’s mind

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5

2013 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2013

In a remotely sensed data of a planet, the presence of hydrous species can be inferred using __________ region of the electromagnetic spectrum?

A

Radiowave

B

Gamma

C

Infrared

D

Visible

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6

2013 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2013

On a 1:10,000 scale map, the length of a fault trace on a horizontal plane is represented as 5 cm. The same on a 1:25,000 scale vertical aerial photograph is ________ cm.

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7

2014 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2014

A geological reconnaissance survey is being carried out using remote sensing multispectral data. Which set of the two band data of the following is most appropriate for mapping limonite bearing zones?

A

Near infrared band and Thermal infrared band image data

B

Blue band and Red band image data

C

Shortwave infrared band and Thermal infrared image data

D

Thermal infrared band and X-band radar image data

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8

2016 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2016

In digital remote sensing, land-water contrast is best identified in the ________ wavelength band.

A

ultraviolet

B

near IR

C

middle IR

D

thermal IR

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9

2022 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2022

In which one of the following regions of the electromagnetic spectrum does the maximum atmospheric scattering occur?

A

UV

B

IR

C

Radiowave

D

Microwave

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10

2022 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2022

Which one of the following is the optical spectral window suitable for remote sensing?

A

0.02 – 0.2 μm

B

0.4 – 14 μm

C

0.8 – 2.0 μm

D

0.01 – 1 m

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11

2022 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2022

A digital camera with a focal length of 150 mm is flown at a height of 3000 m over a flat terrain for taking aerial photographs. The scale of the aerial photograph is 1: _____. [in integer]

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12

2024 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2024 [Session 1]

The fraction of the incident electromagnetic energy reflected from a material is known as

A

acuity

B

albedo

C

spectral hue

D

artifact

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13

2025 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2025 [Session 1]

Three pixels P, Q, and R in an image are characterized by the NDVI values of + 0.84, + 0.01, and – 0.89, respectively. Which of the following options is/are correct?

A

P is from vegetation area and Q is from barren land

B

P is from water body and R is from barren land

C

Q is from barren land and R is from water body

D

P is from vegetation area and Q is from water body

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14

2025 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2025 [Session 2]

If the lowest Digital Number (DN) value in an image of 10-bit radiometric resolution is 0, then the maximum DN value of that image is _____ (Answer in integer)

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15

2007 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2007

In remote sensing, DTM is an abbreviation for

A

Day Time Mapping

B

Digital Triangulation Model

C

Digital Transverse Meridian

D

Digital Terrain Model

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16

2017 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2017

Universal Transverse Mercator (UTM) is a type of

A

conical projection.

B

gnomonic projection.

C

orthogonal projection.

D

cylindrical projection.

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17

2017 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2017

Brightness temperature is a function of surface temperature and

A

transmittance.

B

reflectance.

C

refractive index.

D

emissivity.

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18

2017 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2017

The minimum and maximum values of the digital number (DN) of a remote sensing image are 8 and 32 respectively. The digital data was linearly stretched between 0 and 255 by using min-max linear stretching method. The post stretched integer DN value of a pixel with an original DN value of 27 will be __________.

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19

2018 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2018

Which one of the following is an image rectification technique?

A

Histogram equalization

B

Density slicing

C

Histogram normalization

D

Rubbersheeting

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20

2019 · Geology & Geophysics · Common Section · Introduction to remote sensing

Geology & Geophysics (GG) 2019

On Survey of India Toposheet number 45 \frac{D}{10}, the distance between two points is 18 cm.
The actual ground distance between these two points is _______ km.

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