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Machine Design

Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

0.5
0.2
0.25
0.6

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Machine Design
The velocity factor for very accurately cut and ground metallic gears operating at velocities upto __________ are equal to 6/(6 + v).

10 m/s
12.5 m/s
20 m/s
15 m/s

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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)

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

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Machine Design
The backlash for spur gears depends upon

Tooth profile
Both module and pitch line velocity
Pitch line velocity
Module

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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%
0.40 to 0.60%
0.20 to 0.40%

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Machine Design
The shear modulus of resilience is proportional to

(Shear stress)²
(Shear stress)3
Shear stress
(Shear stress)⁴

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