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Machine Design

Machine Design
The railway carriage couplings have

Knuckle threads
Square threads
Acme threads
Buttress threads

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Machine Design
Yield point in fatigue loading as compared to static loading is

Depends on other factors
Same
Lower
Higher

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Machine Design
For tight leakage joints, following type of thread is best suited

Buttress
Metric
Square
NPT (national pipe threads).

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Machine Design
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

0.4 times
0.7 times
0.8 times
0.6 times

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Machine Design
A shaft coupling should

Transmit full power of the shaft
Hold the shafts in perfect alignment
All of these
Be easy to connect or disconnect

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Machine Design
The number of slots in a 25 mm castle nut is

4
2
8
6

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MORE MCQ ON Machine Design

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