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Machine Design

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

1.6 d
2 d
1.2 d
2.5 d

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Machine Design
The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be

43869
43929
44047
44045

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Machine Design
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

Clearance
Backlash
Working depth
Face width

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Machine Design
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

(T₁ - T₂ + Tc)/2
T₁ + T₂ + Tc
(T₁ + T₂ + Tc)/2
T₁ - T₂ + Tc

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

Shot peening
Surface decarburisation
Cold working
Under stressing

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Machine Design
A self locking screw has

Coefficient of friction is greater than tangent of load angle
Hole for inserting split pin
Course threads
Fine threads

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