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MACHINE DESIGN

Machine Design
Deep groove ball bearings are used for

Radial load at high speed
Small angular displacement of shafts
Heavy thrust load only
Combined thrust and radial loads at high speed

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Machine Design
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

7.2 N/mm² tension
3.6 N/mm² compression
7.2 N/mm² compression
3.6 N/mm² tension

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Machine Design
A backing ring is used inside the pipe joint when making a

Butt weld
Fillet weld
Socket weld
Sleeve weld

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Machine Design
Oil in journal bearing should be applied at the point where load is

Nil or lightest
Average
Maximum
Any one of the above

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Machine Design
Shear stress theory is applicable for

All of these
Ductile materials
Elastic materials
Brittle materials

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