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Machine Design

Machine Design
The material used for brake lining should have __________ coefficient of friction.

Low
Moderate
High
None of these

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Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

None of these
Both the shafts are equally good
Shaft B is better than shaft A
Shaft A is better than shaft B

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Machine Design
In designing a key, it is assumed that the distribution of forces along the length of key

Is uniform throughout
Varies exponentially, being more at the torque-input end
Varies linearly
Varies exponentially, being less at the torque-input end

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Machine Design
The shear plane in case of bolts should

Be normal to threaded portion of shank
Never be across the threaded portion
Be across threaded portion of shank
Be parallel to axis of bolt

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Machine Design
Factor of safety for fatigue loading is the ratio of

Elastic limit to the working stress
Elastic limit to the yield point
Young's modulus to the ultimate tensile strength
Endurance limit to the working stress

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Machine Design
A connecting rod is designed as a

Strut
Short column
Long column
All of these

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