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Machine Design

Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

None of these
Same
Half
Double

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Machine Design
Allen bolts are

Used in aircraft application
Self locking bolts
Provided with hexagonal depression in head
Designed for shock load

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Machine Design
Multiple threads are used to secure

High load lifting capacity
High efficiency
Low efficiency
High mechanical advantage

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Machine Design
The objective of caulking in a riveted joint is to make the joint

Stronger in tension
Leak-proof
Free from stress
Free from corrosion

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Machine Design
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

Hollow saddle key
Soft key
Hollow key
None of these

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Machine Design
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

1.25 × diameter of bolt
Diameter of bolt
0.75 × diameter of bolt
1.5 × diameter of bolt

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