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Machine Design

Machine Design
The number of slots in a 25 mm castle nut is

6
2
4
8

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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
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

2 × (π/4) d² × τ × n
(π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
3 × (π/4) d² × τ × n

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Machine Design
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

T₁ - T₂ + Tc
(T₁ + T₂ + Tc)/2
(T₁ - T₂ + Tc)/2
T₁ + T₂ + Tc

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Machine Design
The taper on key is given on

Any side
Bottom side only
Top side only
On both sides

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Machine Design
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

None of these
More
Same
Less

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