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Machine Design

Machine Design
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of

0.65
0.45
0.55
0.75

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Machine Design
Cast iron pipes are mainly used

All of these
In pressure lubrication systems on prime movers
For conveying steam
In water and sewage systems

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Machine Design
In order to withstand resistance to wear, the best profile of gear is

14½° stub tooth
20° involute stub tooth
14½° full depth involute tooth
20° full depth involute tooth

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Machine Design
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves

None of these
Axially upwards
Axially downwards
Axially upwards or downwards

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Machine Design
Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.

Eight times
Twice
Sixteen times
Four times

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

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

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