## Theory of Machine A governor is said to be stable, if the

Radius of rotation of balls increases as the equilibrium speed increases
Radius of rotation of balls decreases as the equilibrium speed increases
Radius of rotation of balls decreases as the equilibrium speed decreases
Radius of rotation of balls increases as the equilibrium speed decreases

## Theory of Machine Coriolis component acts

None of these
Along sliding surfaces
Perpendicular to sliding surfaces
Somewhere in between above two

Clearance circle
Pitch circle
Dedendum circle

## Theory of Machine A watt's governor can work satisfactorily at speeds from

80 to 100 r.p.m.
200 to 300 r.p.m.
100 to 200 r.p.m.
60 to 80 r.p.m.

## Theory of Machine In railway axle boxes, the bearing used is

Double row self aligning ball bearing
Deep groove ball bearing
Cylindrical roller bearing
Double row spherical roller bearing

## Theory of Machine Hammer blow

Varies as the square root of the speed
Varies inversely with the square of the speed
Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses.
Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses