19 October Static Quiz 2021
Quiz-summary
0 of 5 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
Information
19 October Static Quiz 2021 for UPSC Prelims
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 5 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- Answered
- Review
- Question 1 of 5
1. Question
The point where the energy is released during the earthquake is called?
CorrectAns;- b) Hypocentre
Explanation;-
• The Hypocenter is the point within the earth where an earthquake rupture starts.
• The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus, ash shown in the below attached image.
IncorrectAns;- b) Hypocentre
Explanation;-
• The Hypocenter is the point within the earth where an earthquake rupture starts.
• The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus, ash shown in the below attached image.
- Question 2 of 5
2. Question
Consider the following statement about Tsunami, a Japanese word, which means Harbour waves
1. The Tsunami originates in the ocean only due to earthquakes that occur on the ocean-bed.
2. To generate Tsunami waves, there should be vertical displacement of water column, which happens in the case of strike fault.
3. As the Tsunami waves travels over a shallow and gradual slope, its wavelength decrease, this is called shoaling effect.Which of the above statement is/are correct?
CorrectAns: c) Only 3
Explanation;-
About Tsunamis
• A tsunami is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions, and other underwater explosions above or below water all have the potential to generate a tsunami.
• The Ocean bed earthquakes are not the only reason for generating Tsunami, that’s y statement 1 is incorrect.
• “To generate giant tsunami waves, there should be great vertical displacement of the water column, this happens only in the case of a thrust fault [the December 2004 quake] or a dip-slip fault.
• The Strike-slip fault will not generate tsunami waves.”, that’s y 2nd statement is incorrect.
• The Volcanic eruptions and other underwater explosions, landslides, glacier calvings, meteorite impacts and other disturbances above or below water all have the potential to generate a Tsunami.
IncorrectAns: c) Only 3
Explanation;-
About Tsunamis
• A tsunami is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions, and other underwater explosions above or below water all have the potential to generate a tsunami.
• The Ocean bed earthquakes are not the only reason for generating Tsunami, that’s y statement 1 is incorrect.
• “To generate giant tsunami waves, there should be great vertical displacement of the water column, this happens only in the case of a thrust fault [the December 2004 quake] or a dip-slip fault.
• The Strike-slip fault will not generate tsunami waves.”, that’s y 2nd statement is incorrect.
• The Volcanic eruptions and other underwater explosions, landslides, glacier calvings, meteorite impacts and other disturbances above or below water all have the potential to generate a Tsunami.
- Question 3 of 5
3. Question
The seismic weaves helps in understanding the interior of earth. Which of the following about seismic waves is/are correct ?
1. The P waves travel with fastest speed and are most destructive.
2. The S waves cannot pass through liquid.
3. The surface waves (L) are analogous to light waves.Select the correct answer using the codes given below.
CorrectAns;- b) 2 only
Explanation;-
• The Seismic waves are waves of energy that travel through Earth’s layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy.
• Though P waves travel with fastest speed, they are not most destructive.
• The L waves are most violent and destructive.
• It’s the S waves that are analogous to light waves because S waves are transverse in the nature and the particle moves at right angles to the direction of propagation.
IncorrectAns;- b) 2 only
Explanation;-
• The Seismic waves are waves of energy that travel through Earth’s layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy.
• Though P waves travel with fastest speed, they are not most destructive.
• The L waves are most violent and destructive.
• It’s the S waves that are analogous to light waves because S waves are transverse in the nature and the particle moves at right angles to the direction of propagation.
- Question 4 of 5
4. Question
The Interior of the earth is in a molten state. This is explained by the fact that
1. The shadow zone of the S waves helps in understanding.
2. There is a earthquake shadow zone surrounding the antipode of the epicentre
3. The deflection of P-waves in the interior of the EarthSelect the correct option from the codes given below:
CorrectAns;- d) All of the above
Explanation;-
• An earthquake is not felt in all parts of the world.
• In case of any earthquake, there is a shadow zone in which the earthquake is not felt.
• The shadow zone surrounds the antipode (diametrically opposite on the globe) of the epicentre.
The shadow zone around the area antipodal to the epicentre is caused because the P- and S-waves fail to reach this area and the L-waves, if they at all reach this region, would have become extremely weak due to a long distance from the epicentre.
• The P-waves fail to reach this area due to deflection and the S-waves are absorbed in the interior of the earth.
• This indicates that the interior of the earth is in a molten state.
IncorrectAns;- d) All of the above
Explanation;-
• An earthquake is not felt in all parts of the world.
• In case of any earthquake, there is a shadow zone in which the earthquake is not felt.
• The shadow zone surrounds the antipode (diametrically opposite on the globe) of the epicentre.
The shadow zone around the area antipodal to the epicentre is caused because the P- and S-waves fail to reach this area and the L-waves, if they at all reach this region, would have become extremely weak due to a long distance from the epicentre.
• The P-waves fail to reach this area due to deflection and the S-waves are absorbed in the interior of the earth.
• This indicates that the interior of the earth is in a molten state.
- Question 5 of 5
5. Question
The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?( UPSC Pre 2011)
CorrectAns;- d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots
Explanation;-
• The Mangroves are salt-tolerant trees, also called halophytes, and are adapted to life in harsh coastal conditions.
• They contain a complex salt filtration system and complex root system to cope with salt water immersion and wave action.
• These mangrove forests act as a buffer or shock absorber in time of such disasters.
THE END.
IncorrectAns;- d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots
Explanation;-
• The Mangroves are salt-tolerant trees, also called halophytes, and are adapted to life in harsh coastal conditions.
• They contain a complex salt filtration system and complex root system to cope with salt water immersion and wave action.
• These mangrove forests act as a buffer or shock absorber in time of such disasters.
THE END.
