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Machine Design

Machine Design
Taper usually provided on cotter is

1 in 10
1 in 5
1 in 40
1 in 24

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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
Pitch lead angle
Pressure angle
None of these

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Machine Design
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of

0.75
0.65
0.45
0.55

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Machine Design
According to I.B.R., the thickness of the boiler shell should not be less than

7 mm
6 mm
4 mm
5 mm

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Machine Design
Gears are casted by

Permanent mould casting
Centrifugal casting
Slush casting
Sand mould casting

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Machine Design
In nitrated parts, the origins of the fatigue cracks will occur at

Within the core
Just below the surface
Surface
None of these

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