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Machine Design

Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

43832
1
4
2

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Machine Design
The power transmitted by the belt drive can be increased by

Dressing the belt to increase the coefficient of friction
Increasing the initial tension in the belt
Increasing wrap angle by using idler pulley
All of these

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Machine Design
In a steam engine, the piston rod is usually connected to the cross-head by means of a

Oldham coupling
Cotter joint
Universal joint
Knuckle joint

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Machine Design
The size of a gear is usually specified by

Circular pitch
Diametral pitch
Pitch circle diameter
Pressure angle

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Machine Design
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

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

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Machine Design
For applications involving high stresses in one direction only the following type of thread would be best suited

Square thread
ISO metric thread
Acme thread
Buttress thread

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