Which of the illustrated sources of farm power decrease i...
The diagrams below illustrate different sources of farm power. Study them and answer the question.
Which of the illustrated sources of farm power decrease in efficiency due to constant use?
A.
II and III only
B.
I and III only
C.
I and II only
D.
I, II and III
Correct answer is D
I, II and III will decrease in efficiency due to constant use.
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