Ocean Energy Basics
About what percent of Earth’s surface is covered by oceans?
A) 50% B) 71% C) 85% D) 90%
B) 71%
What temperature difference does an OTEC system rely on?
A) Warm air vs. cold air B) Warm surface water vs. deep cold water C) Tides vs. waves
B)
What is the main purpose of a Wave Energy Converter (WEC)?
A) Convert wave motion into electricity B) Measure tides C) Store kinetic energy
A)
For a tidal plant to work efficiently, the tidal range should be at least:
A) 2 m B) 3 m C) 5 m D) 8 m
C)
Ocean energy is valuable because it’s:
A) Renewable & predictable B) Fossil-based & stable C) Cheap & temporary
A)
What are the two main types of ocean energy?
A) Solar & Wind B) Thermal & Mechanical C) Nuclear & Kinetic
B) Thermal & Mechanical
The minimum temperature difference for efficient OTEC operation is about:
A) 5°C B) 10°C C) 20°C D) 40°C
C)
Oscillating Water Column devices convert wave energy by:
A) Moving a floating buoy B) Forcing air through a turbine C) Rotating underwater blades
B)
What two forces mainly create tides?
A) Wind & currents B) Sun & Moon gravity C) Earth’s rotation & wind
B)
True or False: Maintenance costs are one of the biggest economic challenges for ocean energy systems.True or False: Maintenance costs are one of the biggest economic challenges for ocean energy systems.
True
True or False: Ocean energy is more consistent than solar or wind because tides and waves are predictable.
True
True or false OTEC systems work best in tropical oceans where the surface–deep temperature difference is at least 20 °C.
True
The Wave Dragon device captures wave energy by:
A) Submerging under waves B) Collecting water that overtops into a reservoir C) Compressing air bubbles
B)
How do most tidal plants generate electricity?
A) Spinning underwater turbines B) Using floating buoys C) Evaporating seawater
A)
Which of the following is an environmental concern for ocean energy projects?
A) Noise and marine habitat disruption B) Air pollution C) Deforestation
A)
Which of these is not an ocean energy system?
A) Wave B) Tidal C) Geothermal D) OTEC
C) Geothermal
The two main OTEC systems are:
A) Closed & Open Cycle B) Thermal & Kinetic C) Deep & Shallow
A) Closed & Open Cycle
Which statement about the Eco Wave Power project is true?
A) It was the first U.S. on-shore wave project at the Port of Los Angeles.
B) It was built in Denmark.
C) It only works during high tide.
A)
Which is a disadvantage of tidal energy?
A) It’s unpredictable B) It has high construction costs C) It can’t generate at night
B)
What is the main reason ocean energy isn’t widely used yet?
A) The technology is still developing and costs are high
B) The oceans are shrinking
C) Energy demand is too low
A)
The world’s total wave energy potential is about
A) 2,950 TWh/yr B) 29,500 TWh/yr C) 295,000 TWh/yr
B) 29,500 TWh/yr
Which of these is a challenge for OTEC?
A) High cost B) Few tropical sites C) Both
C) Both
True or False: China’s Nakun generator is the world’s first large floating wave energy system.
True
The Rance Tidal Power Station is located in:
A) France B) Canada C) South Korea
A)
Combining multiple ocean systems (wave + tidal + OTEC) helps because:
A) It keeps output stable year-round under different ocean conditions.
B) It reduces the need for maintenance.
A)