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

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

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Machine Design
Slenderness ratio is the ratio of

Width of column to depth of column
Effective length of column to width of column
Maximum size of column to minimum size of column
Effective length of column to least radius of gyration of the column

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Machine Design
Stress concentration is caused due to

Variation in properties of material from point to point in a member
Abrupt change of section
Pitting at points or areas at which loads on a member are applied
All of these

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Machine Design
Machine screws are

Used to prevent relative motion between two parts
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Slotted for a screw driver and generally used with a nut
Similar to stud

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