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Machine Design

Machine Design
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.2
0.35
0.65
0.5

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Machine Design
A shaft coupling should

Be easy to connect or disconnect
All of these
Hold the shafts in perfect alignment
Transmit full power of the shaft

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Machine Design
The suitable material for belt used in flour mill is

Canvas or cotton duck
Leather
Rubber
Balata gum

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Machine Design
In order to obtain bolt of uniform strength

Drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
Tighten die bolt properly
Increase shank diameter
Increase its length

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Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

None of these
Same
Half
Double

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Machine Design
In a steam engine, the valve rod is connected to an eccentric rod by means of

Universal joint
Cotter joint
Flange coupling
Knuckle joint

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