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Machine Design

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

3 d
5 d
4 d
2 d

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Machine Design
The function of a washer is to

Absorb shocks and vibrations
Provide bearing area
Provide cushioning effect
Provide smooth surface in place of rough surface

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Machine Design
Rankine Gordon formula for buckling is valid for

Short column
Long column
Very long column
Short and long column

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Machine Design
I.S. specifies following total number of grades of tolerances

18
22
16
20

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Machine Design
The washer is generally specified by its

Thickness
Hole diameter
Outer diameter
Mean diameter

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Machine Design
The stretching in a belt can be controlled by __________ the stress in the belt.

Reducing
Both A and B
None of these
Increasing

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