Force-closed
Self-closed
None of these
Friction closed

## Theory of Machine Two heavy rotating masses are connected by shafts of lengths l₁, l₂ and l₃ and the corresponding diameters are d₁, d₂ and d₃. This system is reduced to a torsionally equivalent system having uniform diameter d = d₁ of the shaft. The equivalent length of the shaft is

(l₁ + l₂ + l₃)/3
l₁ + l₂ + l₃
l = l₁ + l₂.(d₁/d₂)³ + l₂.(d₁/d₃)³
l = l₁ + l₂.(d₁/d₂)⁴ + l₃.(d₁/d₃)⁴

## Theory of Machine ________ is an inversion of Double slider crank chain.

Scotch yoke mechanism
Hand pump
Coupling rod of a locomotive
Reciprocating engine

Any one of these

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

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

## Theory of Machine In a reciprocating steam engine, which of the following forms a kinematic link?

Flywheel and engine frame
Cylinder and piston
Piston rod and connecting rod
Crankshaft and flywheel