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Machine Design

Machine Design
For tight leakage joints, following type of thread is best suited

NPT (national pipe threads).
Metric
Square
Buttress

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Machine Design
Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to

Completely reversed loading
Dynamic loading
Static loading
Combined static and dynamic loading

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Machine Design
The shock resistance of steel is increased by adding

Nickel and chromium
Chromium
Nickel
Cobalt and molybdenum

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Machine Design
In thrust bearings, the load acts

Along the axis of rotation
Perpendicular to the axis of rotation
Parallel to the axis of rotation
In any direction

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Machine Design
Which of the following statement is correct for gears?

The pitch circle is always greater than the base circle
The addendum is less than dedendum
The pitch circle diameter is equal to the product of module and number of teeth
All of these

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Machine Design
Basic shaft is one

Whose lower as well as upper deviations are zero
Does not exist
Whose lower deviation is zero
Whose upper deviation is zero

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