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Machine Design

Machine Design
Rankine Gordon formula for buckling is valid for

Short column
Short and long column
Long column
Very long column

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Machine Design
Stress concentration in static loading is more serious in

Brittle materials
Depends on other factors
Ductile materials
Equally serious in both cases

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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)

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

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Machine Design
For maximum power, the velocity of the belt will be

√(T/m)
√(T/3m)
None of these
√(T/2m)

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Machine Design
The spring mostly used in gramophones is

Helical spring
Conical spring
Flat spiral spring
Volute spring

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Machine Design
Which of the following is an anti-friction bearing?

Collar bearing
Journal bearing
Needle bearing
Pedestal bearing

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