1. Geothermal energy is derived from:
(A) Sunlight
(B) Heat inside the Earth
(C) Ocean waves
(D) Wind movement
2. The main source of geothermal energy is:
(A) Nuclear fusion in the core
(B) Radioactive decay in Earth’s crust
(C) Friction between tectonic plates
(D) Solar radiation absorption
3. The temperature gradient of the Earth increases by approximately:
(A) 10°C per km
(B) 25–30°C per km
(C) 50°C per km
(D) 100°C per km
4. Which country is the world leader in geothermal power generation?
(A) Japan
(B) USA
(C) Iceland
(D) Italy
5. The geothermal power plant that uses both steam and hot water is called:
(A) Dry steam plant
(B) Flash steam plant
(C) Binary cycle plant
(D) Hybrid plant
6. The binary cycle geothermal plant uses a:
(A) Secondary working fluid
(B) Steam turbine only
(C) Gas turbine
(D) Diesel engine
7. The main advantage of geothermal energy is that it is:
(A) Non-renewable
(B) Clean and sustainable
(C) Intermittent
(D) Very expensive to operate
8. The main disadvantage of geothermal energy is:
(A) High carbon emission
(B) Limited to certain geographic locations
(C) Requires fossil fuels
(D) Low efficiency
9. The fluid used in a binary geothermal plant is typically:
(A) Water
(B) Mercury
(C) Ammonia or isobutane
(D) Steam
10. The efficiency of a typical geothermal power plant ranges from:
(A) 5–10%
(B) 10–20%
(C) 25–30%
(D) 40–50%
11. The by-product often released from geothermal power plants is:
(A) CO₂ and H₂S
(B) SO₂ only
(C) CO only
(D) Methane
12. Geothermal reservoirs are commonly found in:
(A) Polar regions
(B) Volcanic and tectonic areas
(C) Coastal plains
(D) Deserts
13. The major environmental concern of geothermal power plants is:
(A) Air pollution
(B) Water contamination and land subsidence
(C) Radioactive waste
(D) Noise pollution
14. The first geothermal power plant in the world was built in:
(A) USA
(B) Italy
(C) Iceland
(D) Japan
15. The major component used to convert thermal energy into mechanical energy in geothermal plants is:
(A) Boiler
(B) Turbine
(C) Condenser
(D) Pump
16. 🌊 Tidal Energy MCQs
17. Tidal energy is generated by:
(A) Ocean currents
(B) Rise and fall of sea levels
(C) Waves hitting the shore
(D) Ocean temperature difference
18. The main cause of tides is:
(A) Solar radiation
(B) Gravitational pull of the Moon and Sun
(C) Wind pressure
(D) Earth’s rotation
19. Tidal energy is a form of:
(A) Solar energy
(B) Nuclear energy
(C) Gravitational energy
(D) Chemical energy
20. The device used to generate electricity from tidal energy is called a:
(A) Wind turbine
(B) Tidal turbine
(C) Hydro turbine
(D) Steam turbine
21. The potential energy of tides is converted into electricity using a:
(A) Generator
(B) Turbine
(C) Dam and turbine system
(D) Photovoltaic system
22. The first tidal power station in the world was established in:
(A) France
(B) USA
(C) Canada
(D) UK
23. The main requirement for an efficient tidal power plant is:
(A) High wind speed
(B) Large tidal range
(C) High water temperature
(D) Deep ocean trench
24. The Bay of Fundy is famous for:
(A) Oil production
(B) Geothermal activity
(C) High tidal range
(D) Coral reefs
25. The tidal range is the difference between:
(A) High tide and low tide levels
(B) Sea and river water
(C) Ocean currents
(D) Coastal and deep-sea levels
26. The type of tidal power plant that generates power during both ebb and flood tides is:
(A) One-way system
(B) Two-way system
(C) Pumped storage system
(D) Closed cycle system
27. The tidal barrage system works on:
(A) Kinetic energy of moving water
(B) Potential energy of stored water
(C) Solar heating
(D) Ocean wave pressure
28. The tidal stream system uses:
(A) Moving turbines underwater
(B) Static reservoirs
(C) Air turbines
(D) Steam boilers
29. The major limitation of tidal energy is:
(A) Continuous energy generation
(B) Site-specific and limited locations
(C) Low installation cost
(D) No environmental impact
30. The environmental impact of tidal power plants includes:
(A) Noise pollution
(B) Marine life disturbance and sedimentation
(C) Greenhouse gas emissions
(D) Air pollution
31. The energy conversion efficiency of tidal power plants is approximately:
(A) 10–20%
(B) 30–40%
(C) 70–80%
(D) 90–95%