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Machine Design

Machine Design
The centre to centre distance between two consecutive rivets in a row, is called

Margin
Pitch
Back pitch
Diagonal pitch

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Machine Design
Ball bearing type screws are found in following application

Crane
Steering mechanism
Screw jack
Aeroplane engines

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Machine Design
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

p = D sin (180°/T)
p = D sin (120°/T)
p = D sin (90°/T)
p = D sin (360°/T)

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Machine Design
Gear box is used

To obtain variable speeds
To produce torque
For speed reduction
To increase efficiency of system

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Machine Design
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called

Diametral pitch
Normal pitch
Axial pitch
Module

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Machine Design
In a turnbuckle, if one of the rods has left hand threads, then the other rod will have

Right hand threads
Left hand threads
Pointed threads
Multiple threads

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