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Machine Design

Machine Design
If two springs are in parallel then their overall stiffness will be

Same
None of these
Double
Half

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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)/2
T₁ - T₂ + Tc
T₁ + T₂ + Tc

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Machine Design
A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called

Hydrostatic lubricated bearing
Hydrodynamic lubricated bearing
Boundary lubricated bearing
Zero film bearing

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Machine Design
In cyclic loading, stress concentration is more serious in

Elastic materials
Brittle materials
Ductile materials
Brittle as well as ductile materials

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Machine Design
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

Hollow key
None of these
Soft key
Hollow saddle key

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Machine Design
A bench vice has following type of threads

Buttress
Square
Metric
Acme

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