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Machine Design

Machine Design
The efficiency of a riveted joint is equal to

Pc /P
Least of Pt, Ps and Pc/P
Pt /P
Ps /P

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Machine Design
Resistance to fatigue of a material is measured by

Endurance limit
Elastic limit
Young's modulus
Coefficient of elasticity

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Machine Design
The design of pin of a rocker arm of an I.C. engine is based on

All of these
Bearing failure
Bending failure
Shearing failure

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Machine Design
Belt slip may occur due to

Driving pulley too small
Loose belt
Heavy load
All of these

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Machine Design
In order to obtain bolt of uniform strength

Increase its length
Tighten die bolt properly
Drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
Increase shank diameter

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Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

2.8
2.5
3
3.5

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