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Machine Design

Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

2.5 d
1.6 d
2 d
1.2 d

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Machine Design
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?

Maximum principal stress theory
Maximum strain energy theory
Maximum distortion energy theory
Maximum shear stress theory

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Machine Design
Resilience of a material is important, when it is subjected to

Combined loading
Thermal stresses
Shock loading
Fatigue

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Machine Design
Rivets are generally specified by

Nominal diameter
Thickness of plates to be riveted
Length of rivet
Diameter of head

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Machine Design
The property of a material which enables it to resist fracture due to high impact loads is known as

Toughness
Elasticity
Endurance
Strength

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Machine Design
The shock resistance of steel is increased by adding

Nickel and chromium
Cobalt and molybdenum
Nickel
Chromium

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