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Machine Design

Machine Design
The expansion joint is mostly used for pipes which carry steam at __________ pressures.

None of these
Medium
Low
High

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Machine Design
In a flange coupling, the bolts are subjected to

Shear stress
Compressive stress
Tensile stress
None of these

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Machine Design
In standard taper roller bearings, the angle of taper of outer raceway is

8°
15°
25°
5°

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Machine Design
For maximum power, the velocity of the belt will be

None of these
√(T/2m)
√(T/m)
√(T/3m)

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Machine Design
Which of the following statement is correct for gears?

All of these
The pitch circle is always greater than the base circle
The addendum is less than dedendum
The pitch circle diameter is equal to the product of module and number of teeth

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Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

2.5
3.5
2.8
3

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