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Machine Design

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

44047
43929
44045
43869

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Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

(Kf - 1)/ (Kt - 1)
(Kt - 1)/ (Kf - 1)
(Kt + 1)/ (Kf + 1)
(Kf + 1)/ (Kt + 1)

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Machine Design
Wahl's stress factor __________ very rapidly as the spring index decreases.

Increases
Remain same
Decreases
None of these

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Machine Design
In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be

0.98
0.97
0.96
0.99

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Machine Design
If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as

T sec²φ
T cosecφ
T sec³φ
T/sec³φ

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Machine Design
The power transmitted by belt drive depends upon

Belt velocity
Arc of contact
All of these
Initial belt tension

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