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Machine Design

Machine Design
The suitable material for belt used in flour mill is

Balata gum
Rubber
Leather
Canvas or cotton duck

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Machine Design
The included angle between the sides of V-belt is

38°
60°
45°
40°

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Machine Design
If a load W is applied instantaneously on a bar; Then the stress induced in bar will

Be independent of ratio of mass of load W to mass of bar (y)
Depend on other considerations
Decrease with decrease in y
Increase with increase in y

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Machine Design
Maximum principal stress theory is applicable for

Elastic materials
Ductile materials
Brittle materials
All of these

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Machine Design
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

Medium bearing
Square bearing
Long bearing
Short bearing

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Machine Design
The connecting rod bolts are tightened up with initial tension greater than the external load so that

Bolts are weakest elements
The resultant load on the bolt would not be affected by the external cyclic load
Joint may not open up
Bolts will not loosen during service

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