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Machine Design

Machine Design
A column is known as a long column if the slenderness ratio is

70
40
50
100

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Machine Design
If threads on a bolt are left hand, threads on nut will be

Right hand with same pitch
Could be left or right hand
Right hand with fine pitch
Left hand with same pitch

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Machine Design
The included angle for the British Association thread is

55°
47.3°
29°
60°

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Machine Design
The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

Gerber relation
None of these
Soderberg relation
Goodman relation

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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 V-belt designated as B 4430 LP has

4430 mm as centre distance between pulleys
4430 mm as diameter of small pulley
4430 mm as nominal pitch length
4430 mm as diameter of large pulley

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