IFS (Forests Services) Geology (Mains): Questions 1 - 8 of 31

Access detailed explanations (illustrated with images and videos) to 31 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 150.00 or

How to register?

Question number: 1

» General Geology » Continental Drift-Evidences and Mechanics » Plate Tectonics

Edit

Appeared in Year: 2017

Essay Question▾

Describe in Detail

Explain the geological and paleontological evidences of continental drift and comment on the mechanism of plate separation and collision.

Explanation

Introduction:

Continental drift refers to the horizontal movement of the continents on a vast scale.

  1. Continental land – composed of sial

  2. Ocean floor – composed of sima

Geological and Paleontological evidences:

  1. Continental Boundaries East coast of South America matching with the west coast of Africa.

  2. They fit like parts o

… (683 more words) …

Question number: 2

» Paleontology » Trilobita

Edit

Appeared in Year: 2017

Essay Question▾

Describe in Detail

Discuss the geological history of Trilobites with specific description of the abundance, decline and extinction of the group through the Palaeozoic Era.

Explanation

Trilobita

  • Class – Crustacaea

  • Phylum – Arthropoda

  • Trilobites are one of the well-known and diverse group of arthropods occur in Palaeozoic rocks all over the world

  • Appeared in lower-Cambrian period

  • Abundant in mid- Cambrian (524 million years ago)

  • Reached peak of diversity in Cambrian end

  • Finally disappeared from fossil record

… (492 more words) …

Question number: 3

» Hydrogeology and Engineering Geology » Engineering Properties of Rocks

Edit

Appeared in Year: 2017

Essay Question▾

Describe in Detail

Explain Causes, effects and mitigation measures of concrete cancer

Explanation

  • Introduction

    Concrete cancer is caused when the steel reinforcing within a concrete slab begins to rust. As the steel rusts, it expands, displacing the concrete around it, causing it to become brittle and crack thus accelerating the process.

  • Causes and effect of concrete cancer

    • A poor poured substrate – which allows moisture to pass thro

… (299 more words) …

Question number: 4

» General Geology » Origin and Interior of the Earth

Edit

Appeared in Year: 2017

Essay Question▾

Describe in Detail

Discuss the internal structure of the Earth and comment on the S and P waves shadow zones with suitable diagrams. (Paper-1)

Explanation

Introduction

  • The structure of earth’s interior and the physical properties of various layers are studied by the seismic waves. The seismic waves travel at different velocities depending on the nature of the layer in which they are travelling.

  • The above figure shows the velocities of earthquake waves at various discontinuity surfaces. On the

… (501 more words) …

Question number: 5

» Paleontology » Trilobita and Graptoloidea

Edit

Appeared in Year: 2017

Essay Question▾

Describe in Detail

Describe using diagrams, the morphology of Graptolites and comment on the significance of Graptolites in the evolution of vertebrates. (Mains Paper 1)

Explanation

Introduction

  • Graptolites are an extinct group of marine, colonial animals that built their skeleton from a variety of proteins. They vary in colony size from 2mm to over 1m in length.

  • Shape – Looks like simple stick to bushy shapes

  • Graptolites are distributed worldwide

Image of Dendroid

Image of Dendroid

Image of Dendroid

Image of Orientation of Graptotite

Image of Orientation of Graptotite

Image of Orientation of Graptotite

… (468 more words) …

Question number: 6

» Geochemistry and Environmental Geology » Earthquakes and Volcanic Activity and Mitigation

Edit

Appeared in Year: 2017

Essay Question▾

Describe in Detail

How does volcanic activity affect climate? What types of volcanoes are more hazardous and how? (Mains Paper -2)

Explanation

  • Introduction

    • Volcanic eruptions are responsible for releasing molten rock, or lava, from deep within the Earth, forming new rock on the Earth’s surface and it impacts the atmosphere. The gases and dust particles thrown into the atmosphere during volcanic eruptions causes climatic changes.

    • The particles spewed from volcanoes cool the plan

… (860 more words) …

Question number: 7

» Geomorphology and Remote Sensing » Orbiting Satellites and Sensor Systems

Edit

Appeared in Year: 2017

Essay Question▾

Describe in Detail

Describe the features of Geostationary and Polar orbiting satellites

Explanation

Geostationary satellite characteristics

  • They are placed in geostationary orbits. Satellites in geostationary orbit maintain a constant position relative to the surface of the earth. Geostationary satellites orbit earth 22,300 miles above the equator.

  • This orbital path is called as Clarke Belt. Commonly used for communication and weather- ob

… (284 more words) …

Question number: 8

» Hydrogeology and Engineering Geology » Engineering Properties of Rocks

Edit

Appeared in Year: 2017

Essay Question▾

Describe in Detail

Discuss the geological history of Trilobites with specific description of the abundance, decline and extinction of the group through the Palaeozoic Era. (Geology optional – paper 1)

b) Give a detailed account of the field and laboratory tests carried out to determine the engineering properties of rocks.

To explain the field and laboratory tests carried out to determine the engineering properties of rocks.

Explanation

Field test to determine engineering properties of rocks

  • Mechanical behaviour of rock cannot be determined from laboratory tests. Hence, field tests are carried on to estimate the properties of rock mass.

  • The type and number of insitu tests depends upon the structure and the rock condition. The insitu tests are

    • Shear test

    • Deformability

… (452 more words) …