Machine Design
Cold working

Alone has no influence on fatigue strength
Increases the fatigue strength
Decreases the fatigue strength
Has no influence on fatigue strength

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Machine Design
For same pulley diameters, center distance, belt speed and belt and pulley materials,

Open and crossed belt drives transmit same power
Power transmission does not depend upon open and crossed types of constructions
Open belt drive transmits more power than crossed belt drive
Crossed belt drive transmits more power than open belt drive

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Machine Design
Which is correct statement? Stress concentration in cyclic loading is

Very serious in brittle materials and less serious in ductile materials
Seriousness would depend on other factors
Equally serious in both types of materials
Very serious in ductile materials and less serious in brittle materials

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