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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

0.65
0.2
0.35
0.5

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Machine Design
In the levers of third type, the mechanical advantage is __________ one.

More than
Less than
None of these
Equal to

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Machine Design
Brittle coating technique is used for

Determining brittleness
Experimental stress analysis
Protecting metal against wear and tear
Protecting metal against corrosion

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Machine Design
The square threads are usually found on

Feed mechanism of machine tools
Spindles of bench vices
Railway carriage couplings
Screw cutting lathes

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Machine Design
The root angle of a bevel gear is equal to

Pitch angle - dedendum angle
Pitch angle + dedendum angle
Pitch angle - addendum angle
Pitch angle + addendum angle

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Machine Design
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

None of these
Have same value as that of standard specimen
Increase
Decrease

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