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Machine Design

Machine Design
Ball bearing type screws are found in following application

Screw jack
Aeroplane engines
Steering mechanism
Crane

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Machine Design
The piston pin bearings in heavy duty diesel engines are

Tapered roller bearings
Cylindrical roller bearings
Needle roller bearings
Spherical roller bearings

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Machine Design
Fibrous fracture occurs in

Elastic material
Brittle material
Hard material
Ductile material

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

p.t.σc
(p - d) t.σc
n.d.t.σc
p.d.σc

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

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Machine Design
The algebraic difference between the maximum limit and the basic size is called

Actual deviation
Lower deviation
Mean deviation
Upper deviation

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MORE MCQ ON Machine Design

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