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Machine Design

Machine Design
A riveted joint is a __________ fastening.

Either A or B
Permanent
Temporary
None of these

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Machine Design
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

10
4
6
8

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

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
Joint may not open up

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Machine Design
In a partial journal bearing, the angle of contact of the bearing with the journal is

360°
120°
270°
180°

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Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

Half
Double
Same
None of these

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Machine Design
The acme threads are usually found on

Spindles of bench vices
Screw cutting lathes
Railway carriage couplings
Feed mechanism of machine tools

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