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Machine Design

Machine Design
The material commonly used for machine tool bodies is

Brass
Aluminium
Mild steel
Cast iron

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Machine Design
A screw is specified by its

Minor diameter
Pitch diameter
Major diameter
Pitch

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Machine Design
The permissible stress for carbon steel under static loading is generally taken as

2000-3000 kg/m²
4000-4500 kg/cm²
7500-10,000 kg/cm²
3000-4000 kg/cm²

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Machine Design
Stress concentration factor is defined as the ratio of

Maximum stress to the nominal stress
Nominal stress to the endurance limit
Maximum stress to the endurance limit
Nominal stress to the maximum stress

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Machine Design
Auto frettage is the method of

Increasing the life of thick cylinders
Calculating stresses in thick cylinders
Joining thick cylinders
Pre-stressing thick cylinders

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Machine Design
When the belt is transmitting maximum power, the belt speed should be(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

√(Pmax / 3m)
√(Pmax / m)
√(Pmax / 2m)
√(3m /Pmax)

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