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Machine Design

Machine Design
The pitch diameter is the __________ diameter of an external or internal screw thread.

Smallest
Largest
None of these
Effective

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Machine Design
A screw is said to be over hauling screw, if the

Friction angle is equal to helix angle
Friction angle is less than helix angle
Efficiency of screw is 100%
Friction angle is more than helix angle

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Machine Design
The included angle for the British Association thread is

29°
47.3°
55°
60°

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Machine Design
The property of a bearing material which has the ability to accommodate small particles of dust, grit etc. without scoring the material of the journal, is called

Comformability
Embeddability
Bondability
Fatigue strength

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Machine Design
In the levers of first type, the mechanical advantage is ________ one.

Less than
Equal to
None of these
More than

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Machine Design
The face 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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