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Machine Design

Machine Design
A steel containing _________ 0.8% carbon is known as hypo-eutectoid steel.

None of these
Greater than
Less than
Equal to

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Machine Design
The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given byWhere m = mass of belt per meter (kg/m)v = belt velocity (m/s)f = coefficient of frictiona = angle of wrap (radians)

(P1 - mv²)/ (P2 - mv²) = e–ᶠα
P1 / P2 = e–ᶠα
P1 / P2 = eᶠα
(P1 - mv²)/ (P2 - mv²) = eᶠα

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Machine Design
Three different weights fall from a certain height under vacuum. They will take

Times proportional to weight to reach earth
None of these
Times inversely proportional to weight to reach earth
Same time to reach earth

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Machine Design
Gears are casted by

Sand mould casting
Centrifugal casting
Slush casting
Permanent mould casting

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Machine Design
The distribution of the forces along the length of key fitted in a shaft

Varies exponentially, being less near the torque-input end
Is uniform throughout
Varies linearly
Varies exponentially, being more near the torque-input end

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Machine Design
Which is positive drive?

Timing belt
Flat belt drive
Crossed belt drive
V belt drive

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