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Earthquakes

Course: Engineering geology mcqs — Practice MCQs, solutions, formulas & past entrance questions.

Courses › Engineering geology mcqs › Earthquakes

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Chapter:

Earthquakes (Click to view content)

1. Foreshocks are often recorded in which phase?

Preparatory phase Rupture phase Post failure phase Tertiary phase

Preparatory phase

The preparatory phase is phase in which a non-hydrostatic stress field is created in a certain region around a fault; direction of preparatory phase is to ultimately define size of actual earthquake. A number of ?foreshocks? are often recorded during this phase.

Hint Answer

2. The plate movements at boundaries are ______

Very rapid Fast Moderate in speed Very slow

Very slow

Since plate movements at boundaries are very slow, stresses go on building up in rocks of immediate neighbourhood till limits are reached.

Hint Answer

3. What are surface waves called as?

P-waves S-waves Long waves Transverse waves

Long waves

The L-waves are also called long waves, or surface waves because ir journey is confined mainly to near-surface layers of Earth.

Hint Answer

4. What do rocks undergo during seismic shocks?

Tension Expansion Strengthening Compaction

Compaction

Structures built on loose soil are more risky, due to fact that soil particles undergo a lot of compaction during seismic shocks reby causing settlement.

Hint Answer

5. A dam is subjected to simpler system of forces during an earthquake compared to or buildings.

True False

False

A dam is subject to a more complex system of forces during an earthquake compared to a multi-storeyed building. The risk factor has to be of a higher order.

Hint Answer

6. The inner regions of plates are free from tectonic earthquakes.

True False

True

The tectonism involving earthquakes is related to those boundaries, which are stressed and where stress is released by way of thrust faulting, block faulting or transcurrent faulting. The inner regions of plates are by and large free from tectonic earthquakes.

Hint Answer

7. Which waves travel faster in non-layered homogeneous structure?

Love waves Shock waves Rayleigh waves Transverse waves

Rayleigh waves

The velocity of surface waves is controlled by frequency of waves and structure of ground. In homogeneous non-layered structures, Rayleigh waves travel fast and form prominent L-waves.

Hint Answer

8. The point of origin of an earthquake below earth’s surface is called ______

Isocentre Isopoint Focus Epicentre

Focus

The place or point of origin of an earthquake below surface of earth is termed as its focus or hypocenter. It may lie from a few hundred meters to hundreds of kilometres below surface.

Hint Answer

9. The shallow earthquakes occur very rare.

True False

False

The shallow earthquakes are most commonly observed earthquakes till now whereas deep seated earthquakes are very rare phenomena.

Hint Answer

10. What is depth of focus in shallow earthquakes?

Up to 100 km Up to 200 km Up to 60 km Up to 150 km

Up to 60 km

In shallow earthquakes, depth of focus lies anywhere up to 60 km below surface. A great majority of earthquakes in past had been of this type.

Hint Answer

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All Chapters

View all Chapter and number of question available From each chapter from Engineering-geology-mcqs

Earth Structure

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Geological Works

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Structural Features of Rock

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Folds and Folding

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Faults and Faulting

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Joints and Jointing

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Minerals

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Rocks

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Economic Mineral Deposits

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Groundwater

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Earthquakes

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Mass Movements

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Dams and Reservoirs

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Tunnels

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Engineering Properties of Rocks

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Physiographic Features

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

Geological Work of Water

This chapter of Engineering Geology focus specially on mcqs covering almost all topics where students can practice from various multiple choice exams.

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Foreshocks are often recorded in which phase?

The plate movements at boundaries are ______

What are surface waves called as?

What do rocks undergo during seismic shocks?

A dam is subjected to simpler system of forces during an earthquake compared to or buildings.

The inner regions of plates are free from tectonic earthquakes.

Which waves travel faster in non-layered homogeneous structure?

The point of origin of an earthquake below earth’s surface is called ______

The shallow earthquakes occur very rare.

What is depth of focus in shallow earthquakes?

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