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Machine Design

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

Plastic
Elastic
Brittle
Ductile

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Machine Design
According to Indian standard specifications, a Grey cast iron designated by 'FG 200' means that the

Maximum compressive strength is 200 N/mm²
Maximum shear strength is 200 N/mm²
Carbon content is 2%
Minimum tensile strength is 200 N/mm²

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Machine Design
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

Short bearing
Square bearing
Medium bearing
Long bearing

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Machine Design
When two helical springs of equal lengths are arranged to form a cluster spring, then

Only A is correct
Load taken by each spring will be half the total load
Both A and B is correct
Shear stress in each spring will be equal

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Machine Design
The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

1680 d
1420 d
2840 d
2080 d

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Machine Design
The belt slip occurs due to

Any one of the above
Loose belt
Driving pulley too small
Heavy load

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