## Machine Design When the shaft rotates in anticlockwise direction at high speed in a bearing, it will

Move towards left of the bearing making metal to metal contact
Have contact at the bottom most of the bearing
Move towards right of the bearing making metal to metal contact
Move towards right of the bearing making no metal to metal contact

## Machine Design In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)

T₁/T₂ = μθ × n
T₁/T₂ = (μθ)n
T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n
T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n

2.8
3.5
3
2.5

Circular pitch
None of these
Diametral pitch
Module

## Machine Design When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will

Move towards left of the bearing making metal to metal contact
Move towards right of the bearing making no metal to metal contact
Have contact at the bottom most of the bearing
Move towards right of the bearing making the metal to metal contact

τ/2
4 τ
2 τ
τ