38) The main by-product of the biogas plant is :
Answer is:
organic manure
Related Generation of Electrical Energy MCQ - Electrician (Set-1) with Answers
Answer is:
all of the above
Explanation:
Wind as a source of power
* is non-steady and unreliable
* does not possess the basic requirements of any energy source
* is plentiful, inexhaustible, renewable and non polluting