Ocean Environment: Metocean Conditions
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Questions and Answers

What is an ocean wave?

  • A disturbance caused by energy moving through fire mass
  • A disturbance caused by energy moving through land mass
  • A disturbance caused by energy moving through air mass
  • A disturbance caused by energy moving through water mass (correct)

What represents the highest part of a wave?

  • Wave amplitude
  • Wave trough
  • Wave crest (correct)
  • Wave period

Which forces disturb water to create ocean waves?

  • Sunlight, moonlight, starlight
  • Volcanic eruptions, tornadoes, hurricanes
  • Wind, displacement, changes in atmospheric pressure (correct)
  • Rain, snow, hail

What is the dominant force trying to return the water surface to flat?

<p><strong>Surface tension &amp; gravity</strong> (A)</p> Signup and view all the answers

What is the simplest form of ocean waves?

<p><strong>Sinusoidal</strong> (A)</p> Signup and view all the answers

Which factor affects the size of waves generated by the wind?

<p><strong>The strength of the wind</strong> (A)</p> Signup and view all the answers

What does metocean refer to?

<p>The combined effect of meteorology and oceanography (D)</p> Signup and view all the answers

Which of the following is included in metocean condition?

<p>Local surface wind and wind-generated local waves (C)</p> Signup and view all the answers

How does temperature affect density, viscosity, and salinity in water?

<p>Temperature affects all three properties (B)</p> Signup and view all the answers

What does salinity refer to in the context of ocean water properties?

<p>Average salt content in water (D)</p> Signup and view all the answers

In the open sea, what is the average salinity percentage?

<p>3.5% (D)</p> Signup and view all the answers

What can differences in density in different layers of water with depth create?

<p>Internal waves in deeper regions (A)</p> Signup and view all the answers

What does the symbol 'L' represent in wave theory?

<p>Wavelength (A)</p> Signup and view all the answers

Which parameter represents the propagation speed of the wave crest?

<p>Wave celerity (C)</p> Signup and view all the answers

What is the reciprocal of period in wave theory?

<p>Frequency (B)</p> Signup and view all the answers

Which parameter represents the instantaneous elevation of the wave from the still water level?

<p>Wave elevation (B)</p> Signup and view all the answers

What does 'u' represent in wave theory?

<p>Horizontal water particle velocity (A)</p> Signup and view all the answers

Which parameter represents the instantaneous acceleration along y of a water particle?

<p>Vertical water particle acceleration (B)</p> Signup and view all the answers

What is the primary cause of tsunamis?

<p>Underwater disturbances like earthquakes, landslides, or volcanic eruptions (D)</p> Signup and view all the answers

Which of the following waves have a wavelength between 1-10 meters?

<p>Swell (D)</p> Signup and view all the answers

Which characteristic distinguishes swell from seas?

<p>Swell waves are more regular and have well-defined crests and troughs (C)</p> Signup and view all the answers

What is the typical wave period range for swell waves?

<p>Greater than 10 seconds (B)</p> Signup and view all the answers

Which of the following waves can reach heights of 40 meters or more?

<p>Tsunami (D)</p> Signup and view all the answers

What is the typical wavelength range for capillary waves?

<p>Less than 2 cm (C)</p> Signup and view all the answers

What type of wave theory does the given text describe?

<p>Linear Wave Theory (C)</p> Signup and view all the answers

Which statement about linear wave theory is correct?

<p>It is an approximation of the Stokes Theory. (B)</p> Signup and view all the answers

What is a requirement for linear wave theory to be applicable?

<p>The waves must have equal crest and trough amplitudes. (C)</p> Signup and view all the answers

Why is linear wave theory widely used, according to the text?

<p>It is less mathematically complex than other wave theories. (A)</p> Signup and view all the answers

For what type of waves is linear wave theory most accurate?

<p>Low amplitude waves in deep water (C)</p> Signup and view all the answers

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