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Machine Design

Machine Design
According to Indian standards, total numbers of fundamental deviations are

15
10
25
20

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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

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

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Machine Design
If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by

N/Zp
p/ZN
Z/pN
ZN/p

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Machine Design
In order to remove internal stresses produced by hardening the steel, the process usually adopted is

Tempering
Normalizing
Annealing
Spheroidizing

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Machine Design
The cross-section of the arm of a bell crank lever is

Rectangular
Elliptical
I-section
Any one of these

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Machine Design
When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the

External load applied
Sum of the initial tension and external load applied
Initial tension
Initial tension or external load, whichever is greater

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