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Machine Design

Machine Design
The size of a gear is usually specified by

Diametral pitch
Circular pitch
Pitch circle diameter
Pressure angle

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Machine Design
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

Fullering and caulking
Ease of manufacture
Safety
Reducing stress concentration

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Machine Design
In skew bevel gearing, the axes of shafts are

Non-intersecting and non-parallel and the teeth are straight
Intersecting and the teeth are curved
None of these
Non-intersecting and nonparallel and the teeth are curved

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Machine Design
The material generally used for aircraft components is

High speed steel
Mild steel
Stainless steel
Aluminium

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Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to(Where, Pc = tension in belt due to centrifugal force)

2 Pc
3 Pc
1 Pc
Pc/3

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Machine Design
In the assembly of pulley, key and shaft

All the three are designed for equal strength
Key is made the weakest
Pulley is made the weakest
Key is made the strongest

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