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Machine Design

Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

1
43832
4
2

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Machine Design
For tight leakage joints, following type of thread is best suited

NPT (national pipe threads).
Square
Buttress
Metric

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Machine Design
The design of shafts made of brittle materials is based on

St Venant's theory
Guest's theory
Von Mises theory
Rankine's theory

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Machine Design
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.

Half
Twice
Thrice
None of these

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Machine Design
The function of a washer is to

Provide cushioning effect
Provide smooth surface in place of rough surface
Absorb shocks and vibrations
Provide bearing area

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Machine Design
For circumferential joint in boilers, the type of joint used is

Lap joint with one ring overlapping the other
Butt joint with single cover plate
Butt joint with double cover plate
Any one of the above

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