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Machine Design

Machine Design
A locking device extensively used in marine type connecting rod ends is a

Castle nut
Jam nut
Ring nut
Sawn nut

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Machine Design
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be

Knuckle threads
Acme threads
Buttress threads
Square threads

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Machine Design
The width of the pulley should be __________ width of the belt.

Greater than
None of these
Less than
Equal to

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Machine Design
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

63 to 70%
80 to 90%
70 to 83%
45 to 60%

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

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Machine Design
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Helix angle
None of these
Pressure angle
Pitch lead angle

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