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Machine Design

Machine Design
In a transverse fillet welded joint, the size of weld is __________ the throat of weld.

2 times
0.5 times
Double
Equal to

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Machine Design
The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called

Yield stress
Repeated stress
Fluctuating stress
Alternating stress

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Machine Design
Creep in belt is due to

All of these
Material of the belt
Material of the pulley
Uneven extensions and contractions due to varying tension

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Machine Design
The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁, and T₂ = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)

T₁/T₂ = μθ
T₁/T₂ = log μθ
log (T₁/T₂) = μθ
T₁/T₂ =eμθ

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Machine Design
The shock absorbing capacity of a bolt can be increased by

Grinding the shank
Making shank diameter equal to core diameter of thread
Tightening it properly
Increasing shank diameter

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Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

Both the shafts are equally good
None of these
Shaft A is better than shaft B
Shaft B is better than shaft A

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