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Machine Design

Machine Design
Ball bearing type screws are found in following application

Aeroplane engines
Steering mechanism
Screw jack
Crane

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Machine Design
In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to

1.5 d
1.25 d
1 d
1.75 d

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Machine Design
Which of the following spring is used in mechanical wrist watch?

Belleville spring
Spiral spring
Torsion spring
Helical compression spring

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

Left hand threads
Multiple threads
Pointed threads
Right hand threads

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Machine Design
For a square key made of mild steel, the shear and crushing strength are related as

Shear strength is equal to crushing strength
Shear strength is less than crushing strength
Shear strength is greater than crushing strength
None of these

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Machine Design
Belt slip may occur due to

All of these
Driving pulley too small
Heavy load
Loose belt

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