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Machine Design

Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

d
0.8 d
1.2 d
0.5 d

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

Flanged
Expansion
Bell and spigot
Threaded

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Machine Design
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)

d = 1.6√t
d = √t
d = 6√t
d = 2√t

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Machine Design
In designing a connecting rod, it is considered like __________ for buckling about Y-axis.

Both ends fixed
One end fixed and the other end free
Both ends hinged
One end fixed and the other end hinged

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Machine Design
If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as

1 - 2 b.L
b/L
1 - (b/L)
b/2L

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Machine Design
The ball bearings are provided with a cage

To maintain the balls at a fixed distance apart
To facilitate slipping of balls
To prevent the lubricant from flowing out
To reduce friction

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