7 Questions

Questions and Answers

- 1.
- A.
It can be quicker/easier to do certain post-processing functions in the frequency domain.

- B.
Time series data is complicated because it is unclear when certain events occur.

- C.
Frequency data shows us the power of events so we can write music about it.

- D.
Option 4

- 2.Velocity =
- A.
Change in density over change in time (D/T)

- B.
Change in distance over change in time (D/T)

- C.
Change in time over change in speed (T/S)

- D.
Option 4

- 3.What is seismic data processing?
- A.
Using a super computer to pick all the relevant frequencies and computer Fast Fourier Transforms in order to determine material density.

- B.
Sorting through waveforms collected by geophones and reducing noise, isolating signal, and picking desired frequencies in order to create the best possible image of the subsurface.

- C.
Taking the data into a recording studio and playing it through geophones to create the song of the subsurface.

- D.
Option 4

- 4.What properties determine how long it takes a sound wave to travel through a material?
- A.
Density, and Seismic Velocity.

- B.
Density, Impedance and Seismic Velocity.

- C.
Density and Mineral Content.

- D.
Option 4

- 5.
- A.
By using a massive ultrasound housed in a tractor trailer to image in Earth's interior.

- B.
By hitting the ground with a big hammer and listening to the sound that it makes.

- C.
By sending controlled acoustic energy into the Earth and recording the enery transmitted back from different horizons.

- D.
Option 4

- 6.What is a Fast Fourier transform?
- A.
An addition problem that turns frequency data into sinusoidal waves.

- B.
A rapid algorithm used to convert time data to frequency data.

- C.
A transform used in engineering for complex number arithmetic.

- D.
Option 4

- 7.
- A.
To use the vibration of loose sediment to locate precious minerals.

- B.
The use different interference rates to find buried water mains.

- C.
To try and generate an accurate picture of the Earth's subsurface and geologic structure.

- D.
Option 4