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Machine Design

Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

5 d
3 d
2 d
4 d

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Machine Design
The shear modulus of resilience is proportional to

(Shear stress)²
(Shear stress)⁴
(Shear stress)3
Shear stress

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Machine Design
According to I.B.R., the thickness of the boiler shell should not be less than

5 mm
6 mm
7 mm
4 mm

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Machine Design
A flange coupling is used to connect two shafts

Which are perfectly aligned
Whose axes intersect at a small angle
Have lateral misalignment
Which are not in exact alignment

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Machine Design
The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

1420 d
2840 d
1680 d
2080 d

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Machine Design
Which of the following pipe joints would be suitable for pipes carrying steam?

Expansion
Threaded
Bell and spigot
Flanged

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