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Machine Design

Machine Design
Wahl's stress factor __________ very rapidly as the spring index decreases.

Remain same
Increases
None of these
Decreases

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Machine Design
A transmission shaft includes

Over head shaft
Counter shaft
All of these
Line shaft

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Machine Design
For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.

Less than unity
None of these
Greater than unity
Equal to 1

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Machine Design
The crest diameter of a screw thread is same as

Pitch diameter
Core diameter
Minor diameter
Major diameter

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

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Machine Design
A cotter joint is used to connect two __________ rods.

None of these
Perpendicular
Co-axial
Parallel

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