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Machine Design

Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Honed
Bent
Crimped
Flared

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Machine Design
If two springs are in parallel then their overall stiffness will be

Half
None of these
Double
Same

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Machine Design
Guest's theory of failure is applicable for following type of materials

Brittle
Elastic
Plastic
Ductile

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Machine Design
The smallest diameter of an external or internal screw thread is known as

Minor diameter
Major diameter
None of these
Pitch diameter

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Machine Design
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

(p - d) t.σt
p.t.σt
p.d.σt

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Machine Design
Screws used for power transmission should have

High efficiency
Strong teeth
Very fine threads
Low efficiency

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