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Machine Design

Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Acme
Square
Metric
Buttress

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Machine Design
The efficiency of a riveted joint is equal to

Least of Pt, Ps and Pc/P
Pt /P
Ps /P
Pc /P

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Machine Design
The following type of nut is used with alien bolt

Slotted nut
Hexagonal nut
Any one of the above
Castle nut

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

0.45
0.75
0.65
0.55

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Machine Design
The load cup of a screw jack is made separate from the head of the spindle to

Reduce the value of frictional torque
Enhance the load carrying capacity of the jack
Reduce the effort needed for lifting the working load
Prevent the rotation of load being lifted

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Machine Design
The centrifugal tension in belts

Increases the belt tension without increasing power transmission
Increases the power transmitted
Decreases the power transmitted
Increase the wrap angle

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