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Machine Design

Machine Design
The railway carriage couplings have

Knuckle threads
Acme threads
Buttress threads
Square threads

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Machine Design
Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to

Completely reversed loading
Static loading
Combined static and dynamic loading
Dynamic loading

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Machine Design
The tension on the slack side of the belt is __________ the tension on the tight side of the belt.

Equal to
None of these
Less than
Greater than

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Machine Design
The centrifugal tension in the belt

Has no effect on the power transmitted
Is equal to maximum tension on the belt
Increases the power transmitted
Decreases the power transmitted

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Machine Design
For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is

1/tanθ
sinθ cosθ
1/sinθ
1/cosθ

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Machine Design
Surface endurance limit of gear material is dependent upon its

Yield strength
Elastic strength
Brinell hardness number
Toughness

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