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Machine Design

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

4
8
10
6

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Machine Design
A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called

Zero film bearing
Hydrostatic lubricated bearing
Hydrodynamic lubricated bearing
Boundary lubricated bearing

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Machine Design
A steel containing up to 0.15% carbon is known as

Dead mild steel
Medium carbon steel
High carbon steel
Mild steel

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Machine Design
If a load W is applied instantaneously on a bar; Then the stress induced in bar will

Decrease with decrease in y
Increase with increase in y
Be independent of ratio of mass of load W to mass of bar (y)
Depend on other considerations

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Machine Design
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is

1 micron
10 microns
0.1 micron
0.01 micron

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Machine Design
The pitch of threads on a Jock nut in comparison to pitch of nut is

Finer
Very fine
Same
Coarser

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