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Machine Design

Machine Design
Which one of the following is a positive drive?

Chain drive
Crossed flat belt drive
Rope drive
V-belt drive

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Machine Design
According to Indian standards, total numbers of tolerance grades are

18
8
12
20

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Machine Design
Resistance to fatigue of a material is measured by

Elastic limit
Young's modulus
Coefficient of elasticity
Endurance limit

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Machine Design
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

T₁ - T₂ + Tc
(T₁ - T₂ + Tc)/2
(T₁ + T₂ + Tc)/2
T₁ + T₂ + Tc

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Machine Design
The shock absorbing capacity of a bolt can be increased by

Making shank diameter equal to core diameter of thread
Grinding the shank
Tightening it properly
Increasing shank diameter

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Machine Design
Aircraft body is usually fabricated by

Riveting
Casting
Pre-casting
Welding

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