## Theory of Machine Angle of ascent of cam is defined as the angle

Of rotation of the cam for a definite displacement of the follower
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
During which the follower returns to its initial position
Through which the cam rotates during the period in which the follower remains in highest position

10°
20°
30°
40°

## Theory of Machine When a slider moves on a fixed link having curved surface, their instantaneous centre lies

On their point of contact
At the pin joint
At the centre of curvature
At the centre of circle

## Theory of Machine When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

Governor
Flywheel
D-slide valve
Meyer's expansion valve

Open pair
Higher pair
Close pair
Lower pair

## 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 sinθ
m.ω².r cosθ