## Theory of Machine Klein's construction gives a graphic construction for

Four bar chain mechanism
Slider-crank mechanism
Velocity polygon
Acceleration polygon

## Theory of Machine Governor is used in automobile to

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

Circle
Ellipse
Straight line
Parabola

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

## Theory of Machine In an open pair, the two elements of a pair

Are not held together mechanically
Have a line or point contact when in motion
Have a surface contact when in motion
Are kept in contact by the action of external forces, when in motion

## Theory of Machine The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is

Flexible coupling
Chain coupling
Oldham's coupling
Universal coupling