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Machine Design

Machine Design
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

More
Same
Less
None of these

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

2 d
3 d
5 d
4 d

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Machine Design
The rivet head used for boiler plate riveting is usually

Snap head
Counter sunk head
Pan Head
Conical head

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Machine Design
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

None of these
Vickers
Brinell
Rockwell

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Machine Design
If threads on a bolt are left hand, threads on nut will be

Left hand with same pitch
Right hand with same pitch
Right hand with fine pitch
Could be left or right hand

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Machine Design
The bearing characteristic number in a hydrodynamic bearing depends upon

Length, width and load
Viscosity, speed and load
Viscosity, speed and bearing pressure
Length, width and speed

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