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Machine Design

Machine Design
For maximum power, the velocity of the belt will be

√(T/3m)
√(T/2m)
None of these
√(T/m)

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Machine Design
In a flange coupling, the bolts are subjected to

Compressive stress
Shear stress
Tensile stress
None of these

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Machine Design
The included angle for the V-belt is usually

40°-60°
60°-80°
10°-20°
30°-40°

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

Cold working
Surface decarburisation
Under stressing
Shot peening

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Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

τ
τ/2
2 τ
4 τ

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Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

20° stub system
None of these
14½° composite and full depth involute system
20° full depth involute system

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