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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)

0.8 d
1.2 d
0.5 d
d

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Machine Design
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

4
6
10
8

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Machine Design
According to Indian standard specifications, a Grey cast iron designated by 'FG 200' means that the

Maximum shear strength is 200 N/mm²
Carbon content is 2%
Maximum compressive strength is 200 N/mm²
Minimum tensile strength is 200 N/mm²

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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 = 2√t
d = √t
d = 1.6√t
d = 6√t

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Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

d
0.5 d
1.25 d
0.75 d

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Machine Design
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.

None of these
Smaller than
Equal to
Larger than

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