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Machine Design

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

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

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Machine Design
While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as

One end fixed and the other end free
Both the ends fixed
One end fixed and the other end hinged
Both the ends hinged

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Machine Design
For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.

Greater than unity
None of these
Equal to 1
Less than unity

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is

Bending stress
Shear stress
Tensile stress
Compressive stress

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Machine Design
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

2εc + εl
εc + εl²
εc + 2εl
εc² + εl

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Machine Design
The resultant axial load on a bolt depends upon

External load applied
Relative elastic yielding of the bolt and the connected members
Initial tension due to tightening of the bolt
All of these

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