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Machine Design

Machine Design
In a flange coupling, the flanges are coupled together by means of

None of these
Bolts and nuts
Studs
Headless taper bolts

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Machine Design
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be

3 times more
4 times more
2 times more
Same in both cases

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Machine Design
The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to

6/(6 + v)
4.5/(4.5 + v)
0.75/(0.75 + √v)
3/(3 + v)

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Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

2 d
2.5 d
1.2 d
1.6 d

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Machine Design
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

6
4
10
8

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Machine Design
The included angle for the British Association thread is

29°
55°
60°
47.3°

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MORE MCQ ON Machine Design

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