Theory of Machine
The partial balancing means

Best balancing of engines
Balancing partially reciprocating masses
Balancing partially revolving masses
All of these

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

m.ω².r cosθ
m.ω².r (cos 2θ/n)
m.ω².r (sin 2θ/n)
m.ω².r sinθ

ANSWER DOWNLOAD EXAMIANS APP