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Machine Design

Machine Design
Which of the following property is essential for spring materials?

Stiffness
Plasticity
Resilience
Ductility

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Machine Design
Which of the following screw thread is adopted for power transmission in either direction?

Multiple threads
Acme threads
Square threads
Buttress threads

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Machine Design
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

80 to 90%
70 to 83%
63 to 70%
45 to 60%

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Machine Design
Rankine Gordon formula for buckling is valid for

Long column
Very long column
Short and long column
Short column

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Machine Design
The connecting rod bolts are tightened up so that tightening stress

Is 50% of yield point
Is about yield point divided by safety factor
Approaches yield point
Is just sufficient to hold parts together

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Machine Design
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?

Woodruff key
Gib-head key
Tangent key
Feather key

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