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Machine Design

Machine Design
A column is known as a long column if the slenderness ratio is

40
70
100
50

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Machine Design
For general industrial machinery, the ratio of the length of journal to its diameter is taken as

5 to 10
1 to 2
0.5 to 1
3 to 5

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Machine Design
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

p.t.σt
(p - d) t.σt
p.d.σt

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Machine Design
In V-belt drive, belt touches

Both at bottom and sides
Could touch anywhere
At sides only
At bottom

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Machine Design
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to

(1/2) × √(M² + T²)
M + √(M² + T²)
(1/2) × [M + √(M² + T²)]
√(M² + T²)

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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

Compressive stress
Shear stress
Tensile stress
Bending stress

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