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Answer :

Most efficient plants are normally used as base load plants.

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Answer : Generators for peak load plants are usually designed for maximum efficiency at 50 to 75 percent full load.

Description : Why is AC considered more efficient than DC?

Answer : Ac is more efficient than dc because it is easy to maintain and change the voltage of ac for transmission and distribution purpose. Plant cost of ac transmission is much lower compared to dc transmission. When fault occurs it is easy to interrupt ac supply.

Answer : An efficient and a well designed protective relaying should have good selectivity and reliability, economy and simplicity, high speed and selectivity.

Description : With a neat diagram explain medium head hydro-electric power plants. 

Answer : Diagram of medium head hydro-electric power plants:  Explanation:- If head of water is between 30 and 100 m, the plant is called a medium-head plant. Potential energy of ... Francis turbines are normally used. Alternator required in these plants is of low speed and large in diameter. 

Description : Classify the hydro-electric plants according to the head and load basis.  

Answer : Classification the hydro-electric plants According to availability of Head of Water:  1. Very high head power plant 2. High head power plant 3. Medium head power plant 4. Low head power plant  ... -electric plants According to Load basis:   1. Base load power plant 2. Peak load power plant