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Machine Design

Machine Design
In most machine members, the damping capacity of the material should be

High
Low
Zero
Could be anything

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Machine Design
According to I.B.R., the thickness of the boiler shell should not be less than

7 mm
6 mm
4 mm
5 mm

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Machine Design
The ratio of pitch circle diameter in millimeters to the number of teeth, is called

Module
Diametral pitch
Circular pitch
None of these

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Machine Design
Rankine's theory of failure is applicable for following type of materials

Ductile
Plastic
Elastic
Brittle

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Machine Design
The bending moment ‘M’ and a torque ‘T’ is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then ‘M’ is equal to

T/2
4 T
1 T
2 T

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Machine Design
A screw will be self locking, if

Friction angle is more than helix angle
Friction angle is equal to helix angle
Friction angle is less than helix angle
Efficiency of screw is 100%

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