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Machine Design

Machine Design
The suitable material for belt in agricultural machinery is

Cotton duck
Balata gum
Leather
Rubber

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Machine Design
The ratio of driving tensions in V-belt drives is __________ flat belt drives.

Equal to
sin α times more than
sin α times less than
cosec α times more than

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Machine Design
If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension)

P1 + P2
[⅟₂ × (P1 + P2)] + Pc
[(√P1 + √P2)/2]²
⅟₂× (P1 + P2)

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Machine Design
Two shafts will have equal strength, if

Diameter of both the shafts is same
Material of both the shafts is same
Angle of twist of both the shafts is same
Twisting moment of both the shafts is same

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Machine Design
A backing ring is used inside the pipe joint when making a

Sleeve weld
Butt weld
Socket weld
Fillet weld

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Machine Design
Crushing resistance required to crush the rivet per pitch length is

(p - d) t.σc
p.t.σc
p.d.σc
n.d.t.σc

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