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)

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 = [(1 + μ tanθ)/ (1 - μ tanθ)]n

T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n

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

T₁/T₂ = (μθ)n

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Machine Design
A bolt

Has head at one end and other end fits into a tapped hole in the other part to be joined

Has a head on one end and a nut fitted to the other

Has both the ends threaded

Is provided with pointed threads

Has head at one end and other end fits into a tapped hole in the other part to be joined

Has a head on one end and a nut fitted to the other

Has both the ends threaded

Is provided with pointed threads

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Machine Design
A tube has the following advantage over pipe

Lighter and easier to handle

All of these

Smoother inside walls

Greater shock absorption

Lighter and easier to handle

All of these

Smoother inside walls

Greater shock absorption

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Machine Design
The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

Gerber relation

Goodman relation

None of these

Soderberg relation

Gerber relation

Goodman relation

None of these

Soderberg relation

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Machine Design
Spring index is

Its capability of storing energy

Load required to produce unit deflection

Indication of quality of spring

Ratio of coil diameter to wire diameter

Its capability of storing energy

Load required to produce unit deflection

Indication of quality of spring

Ratio of coil diameter to wire diameter

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Machine Design
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

Face width

Backlash

Clearance

Working depth

Face width

Backlash

Clearance

Working depth

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Machine Design

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)

Machine Design A bolt

Machine Design A tube has the following advantage over pipe

Machine Design The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

Machine Design Spring index is

Machine Design The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

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)

Machine Design
A bolt

Machine Design
A tube has the following advantage over pipe

Machine Design
The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

Machine Design
Spring index is

Machine Design
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called