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Machine Design

Machine Design
Which one of the following is a positive drive?

Rope drive
V-belt drive
Crossed flat belt drive
Chain drive

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Machine Design
The pipe joint mostly used for pipes carrying water at low pressures is

Union joint
Spigot and socket joint
Socket joint
Nipple joint

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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)

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

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Machine Design
Oldham coupling is used to connect two shafts

Which have lateral misalignment
Whose axes intersect at a small angle
Which are perfectly aligned
Which are not in exact alignment

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Machine Design
In case of pressure vessels having open ends, the fluid pressure induces

None of these
Longitudinal stress
Shear stress
Circumferential stress

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Machine Design
The objective of idler pulley in belt drive is to

Decrease the tendency of belt to slip
All the above objectives
Increase the wrap angle and belt tension
Increase the power transmission capacity

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