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Machine Design

Machine Design
Ball bearing type screws are found in following application

Screw jack
Aeroplane engines
Steering mechanism
Crane

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Machine Design
The longitudinal stress is __________ of the circumferential stress.

Three-fourth
One-half
Double
Two-third

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Machine Design
When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be

8F/ πd²
6F/ πd²
4F/ πd²
16F/ 3πd²

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Machine Design
In second type of levers,

Load is in between the fulcrum and effort
None of these
Fulcrum is in between the load and effort
Effort is in between the fulcrum and load

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Machine Design
Which of the following pipe joints would be suitable for pipes carrying steam?

Expansion
Threaded
Bell and spigot
Flanged

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Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

0.8 d
1.2 d
d
0.5 d

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