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Top 100+ Geo Physics Interview Questions And Answers - May 30, 2020

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Top 100+ Geo Physics Interview Questions And Answers

Question 1. What Scales Are Used For Magnitude? For Intensity?

Answer :

Seismic scales
Environmental Seismic Intensity scale (ESI)
European Macroseismic Scale (EMS)
Liedu.
Medvedev–Sponheuer–Karnik (MSK)
Modified Mercalli (MM)
PHIVOLCS Earthquake Intensity Scale (PEIS)
Shindo.
Question 2. How Does The Richter Scale?

Answer :

The Richter value scale was developed in 1935 through Charles F. Richter of the California Institute of Technology as a mathematical device to evaluate the dimensions of earthquakes. The importance of an earthquake is determined from the logarithm of the amplitude of waves recorded by way of seismographs.

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Question three. What Is The Difference Between Magnitude And Intensity?

Answer :

Intensity: The severity of earthquake shaking is classed the use of a descriptive scale – the Modified Mercalli Intensity Scale.

Magnitude: Earthquake length is a quantitative degree of the scale of the earthquake at its supply. The Richter Magnitude Scale measures the amount of seismic electricity launched by way of an earthquake.

When an earthquake happens, its magnitude can be given a unmarried numerical fee at the Richter Magnitude Scale. However the intensity is variable over the place tormented by the earthquake, with high intensities near the epicentre and decrease values further away. These are allocated a cost depending on the outcomes of the shaking consistent with the Modified Mercalli Intensity Scale.

Question four. What Is The Richter Magnitude Scale?

Answer :

The Richter significance scale (also Richter scale) assigns a importance range to quantify the dimensions of an earthquake. The Richter scale, developed within the 1930s, is a base-10 logarithmic scale, which defines magnitude because the logarithm of the ratio of the amplitude of the seismic waves to an arbitrary, minor amplitude.

Question 5. What Is The Magnitude And Intensity Of An Earthquake?

Answer :

The intensity is a range of (written as a Roman numeral) describing the severity of an earthquake in terms of its consequences in the world's floor and on humans and their systems. Several scales exist, however the ones most commonly used inside the United States are the Modified Mercalli scale and the Rossi-Forel scale.

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Question 6. What Is The Magnitude Of An Earthquake?

Answer :

Magnitude is a measure of the amount of electricity released for the duration of an earthquake. It can be expressed the use of numerous magnitude scales. One of these, Used in Southern California, is called the Richter scale.

Question 7. What Are The Costs Of Geophysics?

Answer :

Cost is, of course, a key consideration. Most Environmental and Engineering Geophysical surveys have a value structure this is just like that of any licensed professional: an hourly consulting charge plus system apartment prices. In addition, there are related charges of mobilization (considering that most geophysical surveys require acquisition of facts within the discipline), instrumentation amortization, facts processing and interpretation, and document writing and presentation.

Ultimately, the software of geophysics must be assessed in phrases of its projected charges and blessings as indicated above. EEGS specialists are trained to advise in growing cost and advantage exams. It makes no sense to conduct a geophysical survey if the costs are projected to exceed any feasible financial profits, or to exceed the task's operational price range. In widespread, however, geophysical surveys are almost usually extensively less costly than traditional non-technical method of research together with excavation or drilling.

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Question eight. How Are Geophysical Methods Applied In Practice?

Answer :

The implementation of geophysical methods is a based process that consists of a number of key steps, along with:

Initial assessment of the problem at hand (i.E. What is the suspected hassle, what initial records is known approximately the web site, what additional data is needed, and what are the desired outcomes)

Determination of which geophysical approach (or aggregate of methods) will yield the gold standard outcomes. Not all strategies can be relevant as referred to in a number of the links above, consequently, it is important to cautiously verify which techniques are most probable to offer statistics and information applicable to the trouble of interest. Also, at the same time as some techniques may also offer information, they may now not be value-powerful in a particular context.

Identification of the scope (or length) of the specified geophysical coverage.

Assessment of the manner in which the records and records are to be obtained, interpreted and supplied in an effort to cope with the problem handy.

After these simple questions had been replied and the assignment permitted, the geophysical paintings will begin.

Typically, Environmental and Engineering Geophysics consists of field surveys conducted alongside orientated lines (i.E. Survey grids) over the favored place of hobby. For more records on area surveying, you can want to consult the links supplied above inside the "What Geophysical Field Methods are Available" segment.

Question 9. What Geophysical Methods Are Available?

Answer :

Horizontal loop electromagnetic equipment is used to discover conductive zones that can be leachate plumes. As referred to formerly, geophysical methods as implemented to Environmental and Engineering Geophysics have been derived from different primary areas of subsurface research, together with petroleum, mineral and groundwater exploration. 

The methods or techniques most usually employed via practitioners include:

Electromagnetics.
Gravity.
Ground penetrating radar (GPR).
Magnetics.
Resistivity (and / or precipitated polarization).
Seismic refraction (and / or near surface seismic reflection).
Spontaneous capacity (or "SP").
Induced polarization (or "IP").
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Question 10. What Are The Benefits Of Geophysics?

Answer :

Data from very low frequency electromagnetics were transformed to electric modern density and intensity. The dark blue colour shows the middle of a leachate plume emanating from a landfill. Environmental and Engineering Geophysics offers a completely unique window into the earth as a way of detecting sub-surface situations, and its relevancy lies inside the concrete and price-effective advantages it grants. These consist of:

Non-negative : It is right to be used in populated regions, including cities, wherein lots of trendy environmental and engineering issues arise. It additionally way an archeological web site can be tested without destroying it within the technique.

Efficiency : It provides a way of comparing large areas of the subsurface swiftly.

Comprehensiveness : Combinations of strategies (i.E. Multi-disciplinary strategies) provide the way of making use of one-of-a-kind strategies to remedy complicated issues. The extra bodily residences which can be evaluated, the much less ambiguous the interpretation will become.

Cost-effective : Geophysics does no longer require excavation or direct get admission to to subsurface (except within the case of borehole methods wherein get right of entry to is typically by drilled holes). This way extensive volumes of earth may be evaluated at a long way much less value than excavation or maybe grid-drilling techniques.

Proven : The majority of strategies were in lifestyles for more than a half of-century and are mature, but still rather undiscovered and underutilized by way of choice-makers who face complex environmental and engineering troubles.

Question 11. What Are The Types Of Problems Addressed?

Answer :

The sledge hammer affords a source of strength for dedication of the depth to water table and bedrock. Generally, environmental and engineering issues fall into the following classes or sorts:

Infrastructure (highways and bridges)
Groundwater (exploration and contaminant mapping)
Geohazards (earthquake mitigation and crumble shape mapping)
Urban (utility mapping, underground storage tank area)
Geologic Mapping
Archeology
Forensics (i.E., unlawful burials, and many others.)
Civil Engineering / Non-Destructive Testing (NDT)
So-referred to as "Brownfield" and Landfill Investigations
Unexploded Ordnance (UXO detection and characterization)
Dam Safety
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Question 12. What Is Geophysics?

Answer :

The subsurface web page characterization of the geology, geological shape, groundwater, contamination, and human artifacts below the Earth's floor, based on the lateral and vertical mapping of bodily belongings versions which are remotely sensed the use of non-invasive technologies. Many of those technologies are traditionally used for exploration of financial substances which includes groundwater, metals, and hydrocarbons.

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Question thirteen. Give A Formula Which Relates Wavelength And Frequency?

Answer :

The equation that relates wavelength and frequency for electromagnetic waves is: λν=c wherein λ is the wavelength, ν is the frequency and c is the speed of light.

Question 14. Where Do The Shallow Earthquakes Occur?

Answer :

Most earthquakes are a result of fault movement inside the crust, a particularly skinny layer on the Earth's surface. In Cascadia, most earthquakes are shallow quakes that arise within the crust of the North America plate to a intensity of approximately 20 miles (35 km).

Question 15. What Causes A Deep Focus Earthquake?

Answer :

A deep-awareness earthquake in seismology is an earthquake with a hypocenter intensity exceeding 300 km. They arise nearly exclusively at oceanic-continental convergent boundaries in association with subducted oceanic lithosphere.

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Question sixteen. What Causes Earthquakes?

Answer :

Earthquakes are usually precipitated whilst rock underground all at once breaks alongside a fault. This sudden launch of power causes the seismic waves that make the floor shake. When  blocks of rock or two plates are rubbing in opposition to every other, they stick a touch.

Question 17. What Is Meant By A Diurnal Cycle?

Answer :

A diurnal cycle is any pattern that recurs each 24 hours as a result of one complete rotation of the Earth with recognize to the Sun. In climatology, the diurnal cycle is one of the maximum simple sorts of climate patterns. The maximum familiar such sample is the diurnal temperature version.

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Question 18. What Are Diurnal Changes?

Answer :

Diurnal temperature variant is the variant among a high temperature and a low temperature that happens all through the same day.

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Question 19. What Are Magnetic Storms?

Answer :

A disturbance of the magnetic discipline of the earth (or other celestial body).

Question 20. What Causes The Earth's Oblateness?

Answer :

The Earth's oblateness, proven right here as a bulge on the equator (quite exaggerated to demonstrate the idea) causes a twisting force on satellite tv for pc orbits that change various orbital elements through the years. The force caused by the equatorial bulge is still gravity.

Teacher Interview Questions
Question 21. Define Declination, Inclination.

Answer :

Magnetic declination is the angle among magnetic north (the route the north give up of a compass needle factors) and actual north. The declination is high-quality whilst the magnetic north is east of true north. Magnetic inclination is the perspective made by using a compass needle whilst the compass is held in a vertical orientation.

Question 22. Define Curie Temperature.

Answer :

The Curie temperature (TC), or Curie factor, is the temperature at which positive substances lose their permanent magnetic residences, to be replaced via prompted magnetism.

Question 23. What Is A Tomographic Image?

Answer :

Tomography refers to imaging by means of sections or sectioning, thru the use of any type of penetrating wave. The approach is used in radiology, archaeology, biology, atmospheric technology, geophysics, oceanography, plasma physics, substances science, astrophysics, quantum facts, and other sciences.

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Question 24. What Part Of The Earth Does Not Receive Direct P Waves From A Quake?

Answer :

The shadow zone is the area of the earth from angular distances of 104 to one hundred forty degrees from a given earthquake that doesn't receive any direct P waves. The shadow sector consequences from S waves being stopped completely by way of the liquid middle and P waves being bent (refracted) via the liquid core.

Material Science Interview Questions
Question 25. What Is Seismic Imaging?

Answer :

Seismic imaging is a tool that bounces sound waves off underground rock systems to show viable crude oil– and natural gasoline–bearing formations. Seismologists use ultrasensitive gadgets called geophones to record the sound waves as they echo in the earth.

Question 26. What Is A Harmonic Tremor?

Answer :

A harmonic tremor is a sustained release of seismic and infrasonic energy generally related to the underground movement of magma, the venting of volcanic gases from magma, or both.

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Question 27. What Is Seismic Tomography?

Answer :

Seismic tomography is a technique for imaging the subsurface of the Earth with seismic waves produced by means of earthquakes or explosions. P-, S-, and floor waves may be used for tomographic fashions of various resolutions based totally on seismic wavelength, wave supply distance, and the seismograph array insurance.

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Question 28. What Are Sv And Sh Waves?

Answer :

S-waves polarized within the horizontal aircraft are categorised as SH-waves. If polarized inside the vertical aircraft, they're labeled as SV-waves. When an S- or P-wave strikes an interface at an angle apart from ninety degrees, a phenomenon known as mode conversion occurs.

Question 29. What Is A Seismograph And How Does It Function?

Answer :

A seismograph is the device that scientists use to measure earthquakes. The goal of a seismograph is to as it should be file the motion of the floor at some stage in a quake.

Question 30. How Does A Seismograph Works?

Answer :

Seismographs can stumble on quakes which might be too small for human beings to experience. During an earthquake, ground-shaking seismic waves radiate outward from the quake supply, referred to as the epicenter. Different styles of seismic waves journey at one-of-a-kind speeds and through one of a kind elements of the Earth throughout a quake.

Question 31. Distinguish Between A Seismograph And A Seismogram?

Answer :

A seismogram is a visible report this is created with the aid of a seismograph. A seismograph is a bit of gadget that information earthquake moves. These two objects cross hand in hand and are critical for the have a look at of earthquakes.




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