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Machine Design

Machine Design
In a marine flange coupling, the thickness of flange is taken as

3d/4
d/3
d/4
d/2

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Machine Design
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

Brinell
None of these
Rockwell
Vickers

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Machine Design
Which of the following is not correct procedure to increase the fatigue limit?

Shot peening
Cold working
Surface decarburisation
Under stressing

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Machine Design
In block brakes, the ratio of shoe width to wheel diameter is taken between

0.1 and 0.25
0.25 and 0.50
0.75 and 1
0.50 and 0.75

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Machine Design
An alien bolt is

Used in high speed components
Same as stud
Self locking bolt
Provided with hexagonal depression in head

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Machine Design
If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension)

P1 + P2
[(√P1 + √P2)/2]²
[⅟₂ × (P1 + P2)] + Pc
⅟₂× (P1 + P2)

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