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Machine Design

Machine Design
Rankine's theory of failure is applicable for following type of materials

Plastic
Elastic
Brittle
Ductile

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Machine Design
The dedendum circle diameter is equal to (where φ = Pressure angle)

Pitch circle diameter × sinφ
Addendum circle diameter × cosφ
Clearance circle diameter × cosφ
Pitch circle diameter × cosφ

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Machine Design
The ratio of pitch circle diameter in millimeters to the number of teeth, is called

None of these
Circular pitch
Module
Diametral pitch

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Machine Design
The maximum efficiency of a square threaded screw is

(1 + cosφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)
(1 - sinφ)/ (1 + sinφ)
(1 + sinφ)/ (1 - sinφ)

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Machine Design
In designing thick cylinders, the equation used is

Clavarinos' equation
Birnie's equation
Lame's equation
All of these

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

First
None of these
Second
Third

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