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Machine Design

Machine Design
The size of a gear is usually specified by

Pressure angle
Diametral pitch
Pitch circle diameter
Circular pitch

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Machine Design
If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by

Z/pN
p/ZN
ZN/p
N/Zp

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Machine Design
A bench vice has following type of threads

Buttress
Acme
Metric
Square

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Machine Design
Creep in belt is due to

Uneven extensions and contractions due to varying tension
Material of the pulley
All of these
Material of the belt

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Machine Design
The property of a bearing material which has the ability to accommodate small particles of dust, grit etc. without scoring the material of the journal, is called

Embeddability
Fatigue strength
Comformability
Bondability

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Machine Design
In unilateral system of tolerance, the tolerance is allowed on

Both sides of the nominal size
One side of the nominal size
Both sides of the actual size
One side of the actual size

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