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Machine Design

Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

2 d
5 d
3 d
4 d

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Machine Design
The size of a gear is usually specified by

Pressure angle
Circular pitch
Diametral pitch
Pitch circle diameter

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Machine Design
In designing a key, it is assumed that the distribution of forces along the length of key

Varies linearly
Is uniform throughout
Varies exponentially, being more at the torque-input end
Varies exponentially, being less at the torque-input end

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Machine Design
Which of the following bearing is preferred for oscillating conditions?

Needle roller bearing
Double row roller bearing
Taper roller bearing
Angular contact single row ball bearing

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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

0.8 times
0.7 times
0.4 times
0.6 times

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Machine Design
The shock absorbing capacity of a bolt may be increased by

Making the shank diameter equal to core diameter of thread
Decreasing its shank diameter
Increasing its shank diameter
Tightening the bolt properly

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