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Machine Design

Machine Design
Rankine's theory is used for

Plastic materials
Brittle materials
Elastic materials
Ductile materials

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Machine Design
Multiple threads are used to secure

High efficiency
High mechanical advantage
Low efficiency
High load lifting capacity

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Machine Design
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

7.2 N/mm² tension
3.6 N/mm² tension
3.6 N/mm² compression
7.2 N/mm² compression

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Machine Design
The maximum shear stress theory is used for

Nonferrous materials
Plastic materials
Brittle materials
Ductile materials

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Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

30 kN/m
24 kN/m
6 kN/m
12 kN/m

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Machine Design
The included angle between the sides of V-belt is

45°
40°
38°
60°

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