## Theory of Machine Which of the following statement is correct for involute gears?

The pressure angle is constant throughout the teeth engagement.
The variation in centre distance of shafts increases radial force.
The interference is inherently absent.
A convex flank is always in contact with concave flank.

2π/ω
π/ω
ω/2π
ω × 2π

## Theory of Machine Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts?

Theory of machines
Applied mechanics
Kinetics
Mechanisms

## Theory of Machine The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r₁ = Minimum radius of the cam, and θ = Angle turned through by the cam)

(R - r₁) (1 - cosθ)
R (1 - sinθ)
(R - r₁) (1 - sinθ)
R (1 - cosθ)

## Theory of Machine Governor is used in automobile to

Decrease the variation of speed
Limit the vehicle speed
Maintain constant engine speed
Maximize the fuel economy