A Watt’s governor can work satisfactorily at speeds from
(a) 60 to 80 r.p.m
(b) 80 to 100 r.p.m
(c) 100 to 200 r.p.m
(d) 200 to 300 r.p.m
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This key question is from Types of Governors topic in portion Governors of Machine Dynamics