## Theory of Machine In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed

Hartung governor
Wilson Hartnell governor
Pickering governor
Inertia governor

## Theory of Machine The sense of Coriolis component 2 ωv is same as that of the relative velocity vector v rotated at

180° in the direction opposite to the rotation of the link containing the path
45° in the direction opposite to the rotation of the link containing the path
45° in the direction of rotation of the link containing the path
90° in the direction of rotation of the link containing the path

## Theory of Machine In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set to

Reduce slip
Reduce vibration
Ensure proper alignment

## Theory of Machine To obviate axial thrust, following gear drive is used

Double helical gears having identical teeth
Single helical gear in which one of the teeth of helix angle a is more
Double helical gears having opposite teeth
Mutter gears

## Theory of Machine In a single slider crank chain

Each of the four pairs is a turning pair
One is a turning pair and three are sliding pairs
Two are turning pairs and two are sliding pairs
Three are turning pairs and one is a sliding pair

ω² × NO
ω² × QN
ω² × CO
ω² × CN