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MACHINE DESIGN

Machine Design
Deep groove ball bearings are used for

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

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

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

Fillet weld
Socket weld
Sleeve weld
Butt weld

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

Maximum
Nil or lightest
Average
Any one of the above

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Machine Design
Shear stress theory is applicable for

Ductile materials
Elastic materials
All of these
Brittle materials

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