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Machine Design

Machine Design
The difference between the upper limit and lower limit of a dimension is called

Basic size
Tolerance
Actual size
Nominal size

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Machine Design
The taper on cotter varies from

1 in 24 to 1 in 20
1 in 15 to 1 in 10
1 in 48 to 1 in 24
1 in 32 to 1 in 24

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

Backlash
Clearance
Face width
Working depth

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Machine Design
Which of the following material has the maximum ductility?

Aluminium
Mild steel
Copper
Zinc

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Machine Design
The bearing characteristic number in a hydrodynamic bearing depends upon

Length, width and speed
Viscosity, speed and bearing pressure
Length, width and load
Viscosity, speed and load

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Machine Design
For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

4μ sinθ/(2θ + sin 2θ)
4μ sinθ/(θ + sinθ)
μ sinθ/(2θ + sin 2θ)
2μ sinθ/(θ + sinθ)

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