[L8]_Ocean Energy Systems Flashcards
ENGY-775
What is the primary force responsible for tidal energy?
A) Solar radiation
B) Wind interaction
C) Gravitational pull of the Moon and Sun
D) Earth’s magnetic field
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C) Gravitational pull of the Moon and Sun
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ENGY-775
True or False: Tidal power is more accurately referred to as “lunar energy.”
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True
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ENGY-775
Fill in the blank: Tidal streams utilize the ________________ energy of currents through narrow channels.
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kinetic
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ENGY-775
What is the typical cycle duration of tides affecting tidal power generation?
A) 6 hours
B) 12.4 hours
C) 18 hours
D) 24 hours
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B) 12.4 hours
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ENGY-775
What type of turbine requires cutting off water flow for maintenance?
A) Bulb turbine
B) Straflo turbine
C) Tubular turbine
D) Open center turbine
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A) Bulb Turbine
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ENGY-775
True or False: The energy output of a tidal barrage is proportional to the square of the tidal range.
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True
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ENGY-775
Which generation scheme traps water during high tide and releases it to generate power during the ebb tide?
A) Flood generation
B) Ebb generation
C) Two-way operation
D) Pumped storage
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B) Ebb generation
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ENGY-775
Fill in the blank: The acceleration due to gravity (g) used in tidal barrage energy calculations is approximately ________ m/s².
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9.8-m/s²
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ENGY-775
What are the three main processes involved in wave formation by wind?
A) Pressure fluctuation, surface stress, tangential shear
B) Tangential stress, turbulent airflows, wind force on wave face
C) Wave crest interaction, fetch oscillations, wave trough erosion
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B) Tangential stress, turbulent airflows, wind force on wave face
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ENGY-775
True or False: Deep-water waves occur when the water depth is greater than half the wavelength.
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True
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ENGY-775
Fill in the blank: ________ wave height is the average height of the highest one-third of the waves.
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Significant
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ENGY-775
What type of wave energy converter has its principal axis parallel to the wave front?
A) Point absorber
B) Attenuator
C) Terminator device
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C) Terminator device
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ENGY-775
True or False: Point absorbers are typically sensitive to wave energy from all directions.
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True
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ENGY-775
Why is tidal power integration into national grids challenging?
A) Low energy density
B) Environmental concerns
C) High operational costs
D) Short bursts of energy
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D) Short bursts of energy
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ENGY-775
Fill in the blank: Approximately ________% of tidal energy is contained in the top half of the water column.
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75%
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