Optimum speed for grains like gram,pea,etc.,thresher using power is a) 300-400rpm b) 400-600rpm c) 600-800rpm d) 1100-1200rpm

Optimum speed for grains like gram,pea,etc.,thresher using power is  a) 300-400rpm b) 400-600rpm c) 600-800rpm d) 1100-1200rpm
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1 Answer

Answer :

a) 300-400rpm
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