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Machine Design

Machine Design
Crushing resistance required to crush the rivet per pitch length is

p.t.σc
p.d.σc
(p - d) t.σc
n.d.t.σc

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Machine Design
Stress concentration factor is defined as the ratio of

Maximum stress to the nominal stress
Maximum stress to the endurance limit
Nominal stress to the maximum stress
Nominal stress to the endurance limit

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Machine Design
For circumferential joint in boilers, the type of joint used is

Butt joint with double cover plate
Butt joint with single cover plate
Any one of the above
Lap joint with one ring overlapping the other

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Machine Design
The connecting rod bolts are tightened up with initial tension greater than the external load so that

Joint may not open up
The resultant load on the bolt would not be affected by the external cyclic load
Bolts are weakest elements
Bolts will not loosen during service

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Machine Design
The dedendum is the radial distance from the

Pitch circle to the top of a tooth
Addendum circle to the clearance circle
Pitch circle to the bottom of a tooth
Top of a tooth to the bottom of a tooth

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Machine Design
The taper on key is given on

Any side
Bottom side only
On both sides
Top side only

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