Theory of Machine
The indicator using Watt mechanism is known as

Richard indicator
Thompson indicator
Simplex indicator
Thomson indicator

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

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
In order to give the primary balance of the reciprocating parts of a multi-cylinder inline engines

The algebraic sum of the primary forces must be equal to zero
The algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
None of these
Both (A) and (B)

ANSWER DOWNLOAD EXAMIANS APP