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Machine Design

Machine Design
The product of the diametral pitch and circular pitch is equal to

1
π
π × number of teeth
1/π

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Machine Design
Two shafts will have equal strength, if

Material of both the shafts is same
Diameter 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 universal coupling is used to connect two shafts

Which are perfectly aligned
Whose axes intersect at a small angle
Have lateral misalignment
Which are not in exact alignment

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Machine Design
Guest's theory is used for

Plastic materials
Brittle materials
Elastic materials
Ductile materials

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Machine Design
A shaft coupling should

Hold the shafts in perfect alignment
Transmit full power of the shaft
All of these
Be easy to connect or disconnect

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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

None of these
Pitch lead angle
Pressure angle
Helix angle

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