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
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be

1.8 d

1.2 d

0.8 d

1.57 d

1.8 d

1.2 d

0.8 d

1.57 d

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Machine Design
In a journal bearing, the load on the bearing is __________ to the axis of the journal.

None of these

Parallel

Perpendicular

Both A and B

None of these

Parallel

Perpendicular

Both A and B

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Machine Design
The piston rod of a steam engine is usually connected to the cross-head by means of

Universal joint

Cotter joint

Knuckle joint

Bolted joint

Universal joint

Cotter joint

Knuckle joint

Bolted joint

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Machine Design
In case of pressure vessels having open ends, the fluid pressure induces

None of these

Circumferential stress

Longitudinal stress

Shear stress

None of these

Circumferential stress

Longitudinal stress

Shear stress

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Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

(Kf - 1)/ (Kt - 1)

(Kt - 1)/ (Kf - 1)

(Kt + 1)/ (Kf + 1)

(Kf + 1)/ (Kt + 1)

(Kf - 1)/ (Kt - 1)

(Kt - 1)/ (Kf - 1)

(Kt + 1)/ (Kf + 1)

(Kf + 1)/ (Kt + 1)

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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 When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be

Machine Design In a journal bearing, the load on the bearing is __________ to the axis of the journal.

Machine Design The piston rod of a steam engine is usually connected to the cross-head by means of

Machine Design In case of pressure vessels having open ends, the fluid pressure induces

Machine Design The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

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
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be

Machine Design
In a journal bearing, the load on the bearing is __________ to the axis of the journal.

Machine Design
The piston rod of a steam engine is usually connected to the cross-head by means of

Machine Design
In case of pressure vessels having open ends, the fluid pressure induces

Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as