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Machine Design

Machine Design
The strength of the unriveted plate (P) per pitch length is equal to

p.t.σt
p.d.σt
(p - d) t.σt
(p - d) σt

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Machine Design
The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)

Gd⁴/ 8D²n
Gd⁴/ 4D3n
Gd⁴/ 8D3n
Gd3/ 8D3n

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Machine Design
In radial cams, the follower moves

Along the cam axis
In any direction irrespective of cam axis
In a direction parallel to the cam axis
In a direction perpendicular to the cam axis

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Machine Design
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon

None of these
0.35 to 0.45%
0.20 to 0.40%
0.40 to 0.60%

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Machine Design
Which of the following screw thread is used for power transmission in one direction only?

Square threads
Buttress threads
Multiple threads
Acme threads

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Machine Design
The product of the diametral pitch and circular pitch is equal to

π × number of teeth
1/π
π
1

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