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Machine Design

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

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

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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
(T₁ - T₂ + Tc)/2
(T₁ + T₂ + Tc)/2

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Machine Design
The surface finish factor for a mirror polished material is

0.45
0.85
0.65
1

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Machine Design
The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called

Alternating stress
Repeated stress
Fluctuating stress
Yield stress

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Machine Design
When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be

W/2A
W/A
2W/A
3W/A

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Machine Design
An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

Tip of the gear and flank of pinion
Tip of both gear and pinion
Tip of the pinion and flank of gear
Flanks of both gear and pinion

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