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Machine Design

Machine Design
The crest diameter of a screw thread is same as

Pitch diameter
Minor diameter
Core diameter
Major diameter

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Machine Design
The piston rod of a steam engine is usually connected to the cross-head by means of

Bolted joint
Knuckle joint
Universal joint
Cotter joint

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Machine Design
In a flange coupling, the flanges are coupled together by means of

Bolts and nuts
None of these
Studs
Headless taper bolts

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Machine Design
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

8
6
10
4

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Machine Design
When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)

π/4 × d² × tτu
π/4 × d².τu
πd.t.τu
t.τu

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Machine Design
The lower deviation is the algebraic difference between the

None of these
Minimum limit and the basic size
Maximum limit and the basic size
Actual size and the corresponding basic size

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