Renewable Energy Practice Test 10

1. Efficiency of water electrolysis is greater than the efficiency of steam reforming.

False

True

2. _______ turbine is used in closed cycle ocean thermal energy conversion.

High-pressure

Horizontal

Vertical

Low-pressure

3. What is the thermal temperature gradient in Tatapani?

10 degree Celsius/km

60 – 100 degree Celsius/km

110 – 150 degree Celsius/km

1 degree Celsius/km

4. As the vapour pressure of working fluid increases the size of turbine ________

does not change

first increases then decreases

decreases

increases

5. How does the cold and denser water masses sink to the depths of ocean?

Thermohaline circulation

Temperature gradient

Density gradient

Freshwater fluxes

6. What is dynamic tidal power?

A theoretical technology exploiting potential and kinetic energy of tides

A practical technology exploiting thermal energy of tides

A theoretical technology exploiting potential energy of tides

A practical technology exploiting kinetic and potential energy of tides

7. Which of the following is the most popular application of hydrogen fuel cell?

Fuel cell vehicles

Fuel cells spacecraft

Fuel cells stand-alone power supplies

Fuel cell energy power plants

8. Open cycle ocean thermal energy conversion systems use _____ as the working fluid.

vapour from rivers

vapour from seawater

seawater

water from rivers

9. In terms of green house gas emissions, how good or bad is hydrogen fuel?

Lowest contributor of greenhouse gas emissions

Hydrogen cannot be used as fuel

Major contributor of greenhouse gas emissions

Zero-emission fuel

10. How does a tide mill work?

By storing the water and creating a difference in water level

By storing the water when the tide is low and releasing it through a turbine when the tide is high

By using the running water of a tide

By storing the water when the tide is high and releasing it through a turbine when the tide is low