Question 51 : Select the correct formula of potential energy in wave energy?
1. PE/A = 1/4ρa2 × g/gc
2. PE = 1/4ρa2 × g/gc
3. A/PE = 1/4ρa2 × g/gc
4. PE/A = 1/4ρa2 × g
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Question 52 : Who proposed closed cycle approach?
1. Barjot
2. Alexander Edmond Becquerel
3. James Prescott joule
4. LA Rance
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Question 53 : How much is the average temperature at depth of 10 km of earth surface?
1. 200^oC
2. 900^oC
3. 650^oC
4. 20^oC
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Question 54 : Which material is recommended for condensate pipes?
1. Cast iron
2. Aluminum
3. Copper
4. Steel
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Question 55 : What is the material used for building turbines in geothermal plant?
1. Chrome steel
2. Bronze alloys
3. Cast iron
4. Copper alloys
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Question 56 : What are used to reduce to reduce the motion of floats?
1. Back pressure
2. Tubes
3. Damping fins
4. Anchor
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Question 57 : What is major disadvantage of wave energy?
1. It is not efficient enough
2. It is available only in ocean
3. The harnessing cost is more
4. Unstable during high wind pressures
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Question 58 : Waves are caused indirectly by ______
1. Wind energy
2. Solar energy
3. Geo-thermal energy
4. Wave energy
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Question 59 : Water _________ decreases with an increase in temperature.
1. volume
2. density
3. pressure
4. force
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Question 60 : How many known geothermal areas are there in India?
1. 200
2. 340
3. 147
4. 60
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