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Machine Design

Machine Design
The most important dimension in the design of a nut is

Pitch diameter
Outside diameter
Inside diameter
Height

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Machine Design
For longitudinal joint in boilers, the type of joint used is

Any one of the above
Butt joint with single cover plate
Lap joint with one ring overlapping the other
Butt joint with double cover plate

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Machine Design
The dedendum is the radial distance from the

Pitch circle to the bottom of a tooth
Addendum circle to the clearance circle
Top of a tooth to the bottom of a tooth
Pitch circle to the top of a tooth

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Machine Design
The dedendum circle diameter is equal to (where φ = Pressure angle)

Pitch circle diameter × cosφ
Clearance circle diameter × cosφ
Pitch circle diameter × sinφ
Addendum circle diameter × cosφ

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Machine Design
The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

7.5 kN
15 kN
10.6 kN
22.5 kN

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

Flanged
Bell and spigot
Threaded
Expansion

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